Java tutorial
/** * Copyright (C) 2010-2016 Gordon Fraser, Andrea Arcuri and EvoSuite * contributors * * This file is part of EvoSuite. * * EvoSuite is free software: you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation, either version 3.0 of the License, or * (at your option) any later version. * * EvoSuite is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>. */ package org.evosuite.utils.generic; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; import java.lang.reflect.Array; import java.lang.reflect.GenericArrayType; import java.lang.reflect.Modifier; import java.lang.reflect.ParameterizedType; import java.lang.reflect.Type; import java.lang.reflect.TypeVariable; import java.lang.reflect.WildcardType; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.HashMap; import java.util.LinkedHashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.lang3.ClassUtils; import org.apache.commons.lang3.reflect.TypeUtils; import org.evosuite.Properties; import org.evosuite.TestGenerationContext; import org.evosuite.ga.ConstructionFailedException; import org.evosuite.seeding.CastClassManager; import org.evosuite.utils.LoggingUtils; import org.evosuite.utils.ParameterizedTypeImpl; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.googlecode.gentyref.CaptureType; import com.googlecode.gentyref.GenericTypeReflector; public class GenericClass implements Serializable { private static final Logger logger = LoggerFactory.getLogger(GenericClass.class); private static List<String> primitiveClasses = Arrays.asList("char", "int", "short", "long", "boolean", "float", "double", "byte"); private static final long serialVersionUID = -3307107227790458308L; /** * Set of wrapper classes */ private static final Set<Class<?>> WRAPPER_TYPES = new LinkedHashSet<Class<?>>( Arrays.asList(Boolean.class, Character.class, Byte.class, Short.class, Integer.class, Long.class, Float.class, Double.class, Void.class)); protected static Type addTypeParameters(Class<?> clazz) { if (clazz.isArray()) { return GenericArrayTypeImpl.createArrayType(addTypeParameters(clazz.getComponentType())); } else if (isMissingTypeParameters(clazz)) { TypeVariable<?>[] vars = clazz.getTypeParameters(); // Type[] arguments = new Type[vars.length]; // Arrays.fill(arguments, UNBOUND_WILDCARD); Type owner = clazz.getDeclaringClass() == null ? null : addTypeParameters(clazz.getDeclaringClass()); return new ParameterizedTypeImpl(clazz, vars, owner); } else { return clazz; } } /** * Returns the erasure of the given type. */ private static Class<?> erase(Type type) { if (type instanceof Class) { return (Class<?>) type; } else if (type instanceof ParameterizedType) { return (Class<?>) ((ParameterizedType) type).getRawType(); } else if (type instanceof TypeVariable) { TypeVariable<?> tv = (TypeVariable<?>) type; if (tv.getBounds().length == 0) return Object.class; else return erase(tv.getBounds()[0]); } else if (type instanceof GenericArrayType) { GenericArrayType aType = (GenericArrayType) type; return GenericArrayTypeImpl.createArrayType(erase(aType.getGenericComponentType())); } else if (type instanceof CaptureType) { CaptureType captureType = (CaptureType) type; if (captureType.getUpperBounds().length == 0) return Object.class; else return erase(captureType.getUpperBounds()[0]); } else { // TODO at least support CaptureType here throw new RuntimeException("not supported: " + type.getClass()); } } private static Class<?> getClass(String name) throws ClassNotFoundException { return getClass(name, TestGenerationContext.getInstance().getClassLoaderForSUT()); } private static Class<?> getClass(String name, ClassLoader loader) throws ClassNotFoundException { if (name.equals("void")) return void.class; else if (name.equals("int") || name.equals("I")) return int.class; else if (name.equals("short") || name.equals("S")) return short.class; else if (name.equals("long") || name.equals("J")) return long.class; else if (name.equals("float") || name.equals("F")) return float.class; else if (name.equals("double") || name.equals("D")) return double.class; else if (name.equals("boolean") || name.equals("Z")) return boolean.class; else if (name.equals("byte") || name.equals("B")) return byte.class; else if (name.equals("char") || name.equals("C")) return char.class; else if (name.startsWith("[")) { Class<?> componentType = getClass(name.substring(1, name.length()), loader); Object array = Array.newInstance(componentType, 0); return array.getClass(); } else if (name.startsWith("L") && name.endsWith(";")) { return getClass(name.substring(1, name.length() - 1), loader); } else if (name.endsWith(";")) { return getClass(name.substring(0, name.length() - 1), loader); } else if (name.endsWith(".class")) { return getClass(name.replace(".class", ""), loader); } else return loader.loadClass(name); } /** * <p> * isAssignable * </p> * * @param lhsType * a {@link java.lang.reflect.Type} object. * @param rhsType * a {@link java.lang.reflect.Type} object. * @return a boolean. */ public static boolean isAssignable(Type lhsType, Type rhsType) { if (rhsType == null || lhsType == null) return false; try { return TypeUtils.isAssignable(rhsType, lhsType); } catch (Throwable e) { logger.debug("Found unassignable type: " + e); return false; } } private static boolean isMissingTypeParameters(Type type) { if (type instanceof Class) { for (Class<?> clazz = (Class<?>) type; clazz != null; clazz = clazz.getEnclosingClass()) { if (clazz.getTypeParameters().length != 0) return true; } return false; } else if (type instanceof ParameterizedType) { return false; } else { throw new AssertionError("Unexpected type " + type.getClass()); } } /** * <p> * isSubclass * </p> * * @param superclass * a {@link java.lang.reflect.Type} object. * @param subclass * a {@link java.lang.reflect.Type} object. * @return a boolean. */ public static boolean isSubclass(Type superclass, Type subclass) { List<Class<?>> superclasses = ClassUtils.getAllSuperclasses((Class<?>) subclass); List<Class<?>> interfaces = ClassUtils.getAllInterfaces((Class<?>) subclass); if (superclasses.contains(superclass) || interfaces.contains(superclass)) { return true; } return false; } transient Class<?> rawClass = null; transient Type type = null; /** * Generate a generic class by setting all generic parameters to their * parameter types * * @param clazz * a {@link java.lang.Class} object. */ public GenericClass(Class<?> clazz) { this.type = addTypeParameters(clazz); //GenericTypeReflector.addWildcardParameters(clazz); this.rawClass = clazz; } public GenericClass(GenericClass copy) { this.type = copy.type; this.rawClass = copy.rawClass; } /** * Generate a generic class by from a type * * @param type * a {@link java.lang.reflect.Type} object. */ public GenericClass(Type type) { if (type instanceof Class<?>) { this.type = addTypeParameters((Class<?>) type); //GenericTypeReflector.addWildcardParameters((Class<?>) type); this.rawClass = (Class<?>) type; } else { if (!handleGenericArraySpecialCase(type)) { this.type = type; try { this.rawClass = erase(type); } catch (RuntimeException e) { // If there is an unresolved capture type in here // we delete it and replace with a wildcard this.rawClass = Object.class; } } } } /** * Generate a GenericClass with this exact generic type and raw class * * @param type * @param clazz */ public GenericClass(Type type, Class<?> clazz) { this.type = type; this.rawClass = clazz; handleGenericArraySpecialCase(type); } /** * Determine if there exists an instantiation of the type variables such * that the class matches otherType * * @param otherType * is the class we want to generate * @return */ public boolean canBeInstantiatedTo(GenericClass otherType) { if (isPrimitive() && otherType.isWrapperType()) return false; if (isAssignableTo(otherType)) return true; if (!isTypeVariable() && !otherType.isTypeVariable() && otherType.isGenericSuperTypeOf(this)) return true; Class<?> otherRawClass = otherType.getRawClass(); if (otherRawClass.isAssignableFrom(rawClass)) { //logger.debug("Raw classes are assignable: " + otherType + ", have: " // + toString()); Map<TypeVariable<?>, Type> typeMap = otherType.getTypeVariableMap(); if (otherType.isParameterizedType()) { typeMap.putAll(TypeUtils.determineTypeArguments(rawClass, (ParameterizedType) otherType.getType())); } //logger.debug(typeMap.toString()); try { GenericClass instantiation = getGenericInstantiation(typeMap); if (equals(instantiation)) { //logger.debug("Instantiation is equal to original, so I think we can't assign: " // + instantiation); if (hasWildcardOrTypeVariables()) return false; else return true; } //logger.debug("Checking instantiation: " + instantiation); return instantiation.canBeInstantiatedTo(otherType); } catch (ConstructionFailedException e) { logger.debug("Failed to instantiate " + toString()); return false; } } // TODO logger.debug("Not assignable? Want: {}, have {}", otherType, toString()); return false; } /** * <p> * changeClassLoader * </p> * * @param loader * a {@link java.lang.ClassLoader} object. */ public void changeClassLoader(ClassLoader loader) { try { if (rawClass != null) rawClass = getClass(rawClass.getName(), loader); if (type instanceof ParameterizedType) { ParameterizedType pt = (ParameterizedType) type; // GenericClass rawType = new GenericClass(pt.getRawType()); // rawType.changeClassLoader(loader); GenericClass ownerType = null; if (pt.getOwnerType() != null) { ownerType = new GenericClass(pt.getOwnerType()); // ownerType.type = pt.getOwnerType(); ownerType.changeClassLoader(loader); } List<GenericClass> parameterClasses = new ArrayList<GenericClass>(); for (Type parameterType : pt.getActualTypeArguments()) { GenericClass parameter = new GenericClass(parameterType); // parameter.type = parameterType; parameter.changeClassLoader(loader); parameterClasses.add(parameter); } Type[] parameterTypes = new Type[parameterClasses.size()]; for (int i = 0; i < parameterClasses.size(); i++) parameterTypes[i] = parameterClasses.get(i).getType(); this.type = new ParameterizedTypeImpl(rawClass, parameterTypes, ownerType != null ? ownerType.getType() : null); } else if (type instanceof GenericArrayType) { GenericClass componentClass = getComponentClass(); componentClass.changeClassLoader(loader); this.type = GenericArrayTypeImpl.createArrayType(componentClass.getType()); } else if (type instanceof WildcardType) { Type[] oldUpperBounds = ((WildcardType) type).getUpperBounds(); Type[] oldLowerBounds = ((WildcardType) type).getLowerBounds(); Type[] upperBounds = new Type[oldUpperBounds.length]; Type[] lowerBounds = new Type[oldLowerBounds.length]; for (int i = 0; i < oldUpperBounds.length; i++) { GenericClass bound = new GenericClass(oldUpperBounds[i]); // bound.type = oldUpperBounds[i]; bound.changeClassLoader(loader); upperBounds[i] = bound.getType(); } for (int i = 0; i < oldLowerBounds.length; i++) { GenericClass bound = new GenericClass(oldLowerBounds[i]); // bound.type = oldLowerBounds[i]; bound.changeClassLoader(loader); lowerBounds[i] = bound.getType(); } this.type = new WildcardTypeImpl(upperBounds, lowerBounds); } else if (type instanceof TypeVariable<?>) { for (TypeVariable<?> newVar : rawClass.getTypeParameters()) { if (newVar.getName().equals(((TypeVariable<?>) type).getName())) { this.type = newVar; break; } } } else { this.type = addTypeParameters(rawClass); //GenericTypeReflector.addWildcardParameters(raw_class); } } catch (ClassNotFoundException e) { logger.warn("Class not found: " + rawClass + " - keeping old class loader ", e); } catch (SecurityException e) { logger.warn("Class not found: " + rawClass + " - keeping old class loader ", e); } } /* (non-Javadoc) * @see java.lang.Object#equals(java.lang.Object) */ @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; GenericClass other = (GenericClass) obj; //return type.equals(other.type); return getTypeName().equals(other.getTypeName()); /* if (raw_class == null) { if (other.raw_class != null) return false; } else if (!raw_class.equals(other.raw_class)) return false; */ /* if (type == null) { if (other.type != null) return false; } else if (!type.equals(other.type)) return false; */ // return true; } public Class<?> getBoxedType() { if (isPrimitive()) { if (rawClass.equals(int.class)) return Integer.class; else if (rawClass.equals(byte.class)) return Byte.class; else if (rawClass.equals(short.class)) return Short.class; else if (rawClass.equals(long.class)) return Long.class; else if (rawClass.equals(float.class)) return Float.class; else if (rawClass.equals(double.class)) return Double.class; else if (rawClass.equals(char.class)) return Character.class; else if (rawClass.equals(boolean.class)) return Boolean.class; else if (rawClass.equals(void.class)) return Void.class; else throw new RuntimeException("Unknown unboxed type: " + rawClass); } return rawClass; } /** * <p> * getClassName * </p> * * @return a {@link java.lang.String} object. */ public String getClassName() { return rawClass.getName(); } public GenericClass getComponentClass() { if (type instanceof GenericArrayType) { GenericArrayType arrayType = (GenericArrayType) type; Type componentType = arrayType.getGenericComponentType(); Class<?> rawComponentType = rawClass.getComponentType(); return new GenericClass(componentType, rawComponentType); } else { return new GenericClass(rawClass.getComponentType()); } } /** * <p> * getComponentName * </p> * * @return a {@link java.lang.String} object. */ public String getComponentName() { return rawClass.getComponentType().getSimpleName(); } /** * <p> * getComponentType * </p> * * @return a {@link java.lang.reflect.Type} object. */ public Type getComponentType() { return GenericTypeReflector.getArrayComponentType(type); } public Collection<GenericClass> getGenericBounds() { Set<GenericClass> bounds = new LinkedHashSet<GenericClass>(); if (isRawClass() || !hasWildcardOrTypeVariables()) { return bounds; } if (isWildcardType()) { getGenericWildcardBounds(bounds); } else if (isArray()) { bounds.addAll(getComponentClass().getGenericBounds()); } else if (isTypeVariable()) { getGenericTypeVarBounds(bounds); } else if (isParameterizedType()) { getGenericParameterizedTypeBounds(bounds); } return bounds; } private void getGenericWildcardBounds(Collection<GenericClass> bounds) { for (Type t : ((WildcardType) type).getUpperBounds()) { bounds.add(new GenericClass(t)); } for (Type t : ((WildcardType) type).getLowerBounds()) { bounds.add(new GenericClass(t)); } } private void getGenericTypeVarBounds(Collection<GenericClass> bounds) { for (Type t : ((TypeVariable<?>) type).getBounds()) { bounds.add(new GenericClass(t)); } } private void getGenericParameterizedTypeBounds(Collection<GenericClass> bounds) { for (TypeVariable<?> typeVar : getTypeVariables()) { for (Type t : typeVar.getBounds()) { bounds.add(new GenericClass(t)); } } } /** * Instantiate all type variables randomly, but adhering to type boundaries * * @return * @throws ConstructionFailedException */ public GenericClass getGenericInstantiation() throws ConstructionFailedException { return getGenericInstantiation(new HashMap<TypeVariable<?>, Type>()); } /** * Instantiate type variables using map, and anything not contained in the * map randomly * * @param typeMap * @return * @throws ConstructionFailedException */ public GenericClass getGenericInstantiation(Map<TypeVariable<?>, Type> typeMap) throws ConstructionFailedException { return getGenericInstantiation(typeMap, 0); } private GenericClass getGenericInstantiation(Map<TypeVariable<?>, Type> typeMap, int recursionLevel) throws ConstructionFailedException { logger.debug("Instantiation " + toString() + " with type map " + typeMap); // If there are no type variables, create copy if (isRawClass() || !hasWildcardOrTypeVariables() || recursionLevel > Properties.MAX_GENERIC_DEPTH) { logger.debug("Nothing to replace: " + toString() + ", " + isRawClass() + ", " + hasWildcardOrTypeVariables()); return new GenericClass(this); } if (isWildcardType()) { logger.debug("Is wildcard type."); return getGenericWildcardInstantiation(typeMap, recursionLevel); } else if (isArray()) { return getGenericArrayInstantiation(typeMap, recursionLevel); } else if (isTypeVariable()) { logger.debug("Is type variable "); return getGenericTypeVariableInstantiation(typeMap, recursionLevel); } else if (isParameterizedType()) { logger.debug("Is parameterized type"); return getGenericParameterizedTypeInstantiation(typeMap, recursionLevel); } // TODO return null; } /** * Instantiate generic component type * * @param typeMap * @param recursionL * @throws ConstructionFailedException * evel * @return */ private GenericClass getGenericArrayInstantiation(Map<TypeVariable<?>, Type> typeMap, int recursionLevel) throws ConstructionFailedException { GenericClass componentClass = getComponentClass().getGenericInstantiation(); return getWithComponentClass(componentClass); } /** * Instantiate type variable * * @param typeMap * @param recursionLevel * @return * @throws ConstructionFailedException */ private GenericClass getGenericTypeVariableInstantiation(Map<TypeVariable<?>, Type> typeMap, int recursionLevel) throws ConstructionFailedException { if (typeMap.containsKey(type)) { if (typeMap.get(type) == type) { throw new ConstructionFailedException("Type points to itself"); } logger.debug("Type contains " + toString() + ": " + typeMap); GenericClass selectedClass = new GenericClass(typeMap.get(type)).getGenericInstantiation(typeMap, recursionLevel + 1); if (!selectedClass.satisfiesBoundaries((TypeVariable<?>) type)) { logger.debug("Cannot be instantiated to: " + selectedClass); throw new ConstructionFailedException("Unable to instantiate " + toString()); } else { logger.debug("Can be instantiated to: " + selectedClass); } return selectedClass; } else { logger.debug("Type map does not contain " + toString() + ": " + typeMap); GenericClass selectedClass = CastClassManager.getInstance().selectCastClass((TypeVariable<?>) type, recursionLevel < Properties.MAX_GENERIC_DEPTH, typeMap); if (selectedClass == null) { throw new ConstructionFailedException("Unable to instantiate " + toString()); } logger.debug("Getting instantiation of type variable " + toString() + ": " + selectedClass); Map<TypeVariable<?>, Type> extendedMap = new HashMap<TypeVariable<?>, Type>(typeMap); extendedMap.putAll(getTypeVariableMap()); for (Type bound : ((TypeVariable<?>) type).getBounds()) { GenericClass boundClass = new GenericClass(bound); extendedMap.putAll(boundClass.getTypeVariableMap()); if (boundClass.isParameterizedType()) { Class<?> boundRawClass = boundClass.getRawClass(); if (boundRawClass.isAssignableFrom(selectedClass.getRawClass())) { Map<TypeVariable<?>, Type> xmap = TypeUtils.determineTypeArguments( selectedClass.getRawClass(), (ParameterizedType) boundClass.getType()); extendedMap.putAll(xmap); } } } logger.debug("Updated type variable map to " + extendedMap); GenericClass instantiation = selectedClass.getGenericInstantiation(extendedMap, recursionLevel + 1); typeMap.put((TypeVariable<?>) type, instantiation.getType()); return instantiation; } } /** * Instantiate wildcard type * * @param typeMap * @param recursionLevel * @return * @throws ConstructionFailedException */ private GenericClass getGenericWildcardInstantiation(Map<TypeVariable<?>, Type> typeMap, int recursionLevel) throws ConstructionFailedException { GenericClass selectedClass = CastClassManager.getInstance().selectCastClass((WildcardType) type, recursionLevel < Properties.MAX_GENERIC_DEPTH, typeMap); return selectedClass.getGenericInstantiation(typeMap, recursionLevel + 1); } public List<GenericClass> getInterfaces() { List<GenericClass> ret = new ArrayList<GenericClass>(); for (Class<?> intf : rawClass.getInterfaces()) { ret.add(new GenericClass(intf)); } return ret; } /** * Instantiate all type parameters of a parameterized type * * @param typeMap * @param recursionLevel * @return * @throws ConstructionFailedException */ private GenericClass getGenericParameterizedTypeInstantiation(Map<TypeVariable<?>, Type> typeMap, int recursionLevel) throws ConstructionFailedException { List<TypeVariable<?>> typeParameters = getTypeVariables(); Type[] parameterTypes = new Type[typeParameters.size()]; Type ownerType = null; int numParam = 0; for (GenericClass parameterClass : getParameterClasses()) { logger.debug("Current parameter to instantiate: " + parameterClass); /* * If the parameter is a parameterized type variable such as T extends Map<String, K extends Number> * then the boundaries of the parameters of the type variable need to be respected */ if (!parameterClass.hasWildcardOrTypeVariables()) { logger.debug("Parameter has no wildcard or type variable"); parameterTypes[numParam++] = parameterClass.getType(); } else { logger.debug("Current parameter has type variables: " + parameterClass); Map<TypeVariable<?>, Type> extendedMap = new HashMap<TypeVariable<?>, Type>(typeMap); extendedMap.putAll(parameterClass.getTypeVariableMap()); if (!extendedMap.containsKey(typeParameters.get(numParam)) && !parameterClass.isTypeVariable()) extendedMap.put(typeParameters.get(numParam), parameterClass.getType()); logger.debug("New type map: " + extendedMap); if (parameterClass.isWildcardType()) { logger.debug("Is wildcard type, here we should value the wildcard boundaries"); logger.debug("Wildcard boundaries: " + parameterClass.getGenericBounds()); logger.debug("Boundaries of underlying var: " + Arrays.asList(typeParameters.get(numParam).getBounds())); GenericClass parameterInstance = parameterClass.getGenericWildcardInstantiation(extendedMap, recursionLevel + 1); //GenericClass parameterTypeClass = new GenericClass(typeParameters.get(numParam)); // if(!parameterTypeClass.isAssignableFrom(parameterInstance)) { if (!parameterInstance.satisfiesBoundaries(typeParameters.get(numParam))) { throw new ConstructionFailedException("Invalid generic instance"); } //GenericClass parameterInstance = new GenericClass( // typeParameters.get(numParam)).getGenericInstantiation(extendedMap, // recursionLevel + 1); parameterTypes[numParam++] = parameterInstance.getType(); } else { logger.debug("Is not wildcard but type variable? " + parameterClass.isTypeVariable()); GenericClass parameterInstance = parameterClass.getGenericInstantiation(extendedMap, recursionLevel + 1); parameterTypes[numParam++] = parameterInstance.getType(); } } } if (hasOwnerType()) { GenericClass ownerClass = getOwnerType().getGenericInstantiation(typeMap, recursionLevel); ownerType = ownerClass.getType(); } return new GenericClass(new ParameterizedTypeImpl(rawClass, parameterTypes, ownerType)); } /** * Retrieve number of generic type parameters * * @return */ public int getNumParameters() { if (type instanceof ParameterizedType) { return Arrays.asList(((ParameterizedType) type).getActualTypeArguments()).size(); } return 0; } /** * Retrieve the generic owner * * @return */ public GenericClass getOwnerType() { return new GenericClass(((ParameterizedType) type).getOwnerType()); } /** * Retrieve list of actual parameters * * @return */ public List<Type> getParameterTypes() { if (type instanceof ParameterizedType) { return Arrays.asList(((ParameterizedType) type).getActualTypeArguments()); } return new ArrayList<Type>(); } /** * Retrieve list of parameter classes * * @return */ public List<GenericClass> getParameterClasses() { if (type instanceof ParameterizedType) { List<GenericClass> parameters = new ArrayList<GenericClass>(); for (Type parameterType : ((ParameterizedType) type).getActualTypeArguments()) { parameters.add(new GenericClass(parameterType)); } return parameters; } return new ArrayList<GenericClass>(); } /** * <p> * getRawClass * </p> * * @return a {@link java.lang.Class} object. */ public Class<?> getRawClass() { return rawClass; } /** * <p> * getComponentClass * </p> * * @return a {@link java.lang.reflect.Type} object. */ public Type getRawComponentClass() { return GenericTypeReflector.erase(rawClass.getComponentType()); } public GenericClass getRawGenericClass() { return new GenericClass(rawClass); } /** * <p> * getSimpleName * </p> * * @return a {@link java.lang.String} object. */ public String getSimpleName() { // return raw_class.getSimpleName(); String name = ClassUtils.getShortClassName(rawClass).replace(";", "[]"); if (!isPrimitive() && primitiveClasses.contains(name)) return rawClass.getSimpleName().replace(";", "[]"); return name; } public GenericClass getSuperClass() { return new GenericClass(GenericTypeReflector.getExactSuperType(type, rawClass.getSuperclass())); } /** * <p> * Getter for the field <code>type</code>. * </p> * * @return a {@link java.lang.reflect.Type} object. */ public Type getType() { return type; } /** * <p> * getTypeName * </p> * * @return a {@link java.lang.String} object. */ public String getTypeName() { return GenericTypeReflector.getTypeName(type); } private Map<TypeVariable<?>, Type> typeVariableMap = null; public Map<TypeVariable<?>, Type> getTypeVariableMap() { if (typeVariableMap != null) return typeVariableMap; //logger.debug("Getting type variable map for " + type); List<TypeVariable<?>> typeVariables = getTypeVariables(); List<Type> types = getParameterTypes(); Map<TypeVariable<?>, Type> typeMap = new HashMap<TypeVariable<?>, Type>(); try { if (rawClass.getSuperclass() != null && !rawClass.isAnonymousClass() && !rawClass.getSuperclass().isAnonymousClass() && !(hasOwnerType() && getOwnerType().getRawClass().isAnonymousClass())) { GenericClass superClass = getSuperClass(); //logger.debug("Superclass of " + type + ": " + superClass); Map<TypeVariable<?>, Type> superMap = superClass.getTypeVariableMap(); //logger.debug("Super map after " + superClass + ": " + superMap); typeMap.putAll(superMap); } for (Class<?> interFace : rawClass.getInterfaces()) { GenericClass interFaceClass = new GenericClass(interFace); //logger.debug("Interface of " + type + ": " + interFaceClass); Map<TypeVariable<?>, Type> superMap = interFaceClass.getTypeVariableMap(); //logger.debug("Super map after " + superClass + ": " + superMap); typeMap.putAll(superMap); } if (isTypeVariable()) { for (Type boundType : ((TypeVariable<?>) type).getBounds()) { GenericClass boundClass = new GenericClass(boundType); typeMap.putAll(boundClass.getTypeVariableMap()); } } } catch (Exception e) { logger.debug("Exception while getting type map: " + e); } for (int i = 0; i < typeVariables.size(); i++) { if (types.get(i) != typeVariables.get(i)) { typeMap.put(typeVariables.get(i), types.get(i)); } } //logger.debug("Type map: " + typeMap); typeVariableMap = typeMap; return typeMap; } /** * Return a list of type variables of this type, or an empty list if this is * not a parameterized type * * @return */ public List<TypeVariable<?>> getTypeVariables() { List<TypeVariable<?>> typeVariables = new ArrayList<TypeVariable<?>>(); if (type instanceof ParameterizedType) { //logger.debug("Type variables of "+rawClass+": "); //for(TypeVariable<?> var : rawClass.getTypeParameters()) { // logger.debug("Var "+var+" of "+var.getGenericDeclaration()); //} typeVariables.addAll(Arrays.asList(rawClass.getTypeParameters())); } return typeVariables; } public Class<?> getUnboxedType() { if (isWrapperType()) { if (rawClass.equals(Integer.class)) return int.class; else if (rawClass.equals(Byte.class)) return byte.class; else if (rawClass.equals(Short.class)) return short.class; else if (rawClass.equals(Long.class)) return long.class; else if (rawClass.equals(Float.class)) return float.class; else if (rawClass.equals(Double.class)) return double.class; else if (rawClass.equals(Character.class)) return char.class; else if (rawClass.equals(Boolean.class)) return boolean.class; else if (rawClass.equals(Void.class)) return void.class; else throw new RuntimeException("Unknown boxed type: " + rawClass); } return rawClass; } public GenericClass getWithComponentClass(GenericClass componentClass) { if (type instanceof GenericArrayType) { return new GenericClass(GenericArrayTypeImpl.createArrayType(componentClass.getType()), rawClass); } else { return new GenericClass(type, rawClass); } } public GenericClass getWithGenericParameterTypes(List<GenericClass> parameters) { Type[] typeArray = new Type[parameters.size()]; for (int i = 0; i < parameters.size(); i++) { typeArray[i] = parameters.get(i).getType(); } Type ownerType = null; if (type instanceof ParameterizedType) { ownerType = ((ParameterizedType) type).getOwnerType(); } return new GenericClass(new ParameterizedTypeImpl(rawClass, typeArray, ownerType)); } public GenericClass getWithOwnerType(GenericClass ownerClass) { if (type instanceof ParameterizedType) { ParameterizedType currentType = (ParameterizedType) type; return new GenericClass(new ParameterizedTypeImpl(rawClass, currentType.getActualTypeArguments(), ownerClass.getType())); } return new GenericClass(type); } /** * If this is a LinkedList<?> and the super class is a List<Integer> then * this returns a LinkedList<Integer> * * @param superClass * @return * @throws ConstructionFailedException */ public GenericClass getWithParametersFromSuperclass(GenericClass superClass) throws ConstructionFailedException { GenericClass exactClass = new GenericClass(type); if (!(type instanceof ParameterizedType)) { exactClass.type = type; return exactClass; } ParameterizedType pType = (ParameterizedType) type; if (superClass.isParameterizedType()) { Map<TypeVariable<?>, Type> typeMap = TypeUtils.determineTypeArguments(rawClass, (ParameterizedType) superClass.getType()); return getGenericInstantiation(typeMap); } Class<?> targetClass = superClass.getRawClass(); Class<?> currentClass = rawClass; Type[] parameterTypes = new Type[superClass.getNumParameters()]; superClass.getParameterTypes().toArray(parameterTypes); if (targetClass.equals(currentClass)) { logger.info("Raw classes match, setting parameters to: " + superClass.getParameterTypes()); exactClass.type = new ParameterizedTypeImpl(currentClass, parameterTypes, pType.getOwnerType()); } else { Type ownerType = pType.getOwnerType(); Map<TypeVariable<?>, Type> superTypeMap = superClass.getTypeVariableMap(); Type[] origArguments = pType.getActualTypeArguments(); Type[] arguments = new Type[origArguments.length]; // For some reason, doing this would lead to arguments being // of component type TypeVariable, which would lead to // ArrayStoreException if we try to assign a WildcardType //Type[] arguments = Arrays.copyOf(origArguments, origArguments.length); for (int i = 0; i < origArguments.length; i++) arguments[i] = origArguments[i]; List<TypeVariable<?>> variables = getTypeVariables(); for (int i = 0; i < arguments.length; i++) { TypeVariable<?> var = variables.get(i); if (superTypeMap.containsKey(var)) { arguments[i] = superTypeMap.get(var); logger.info("Setting type variable " + var + " to " + superTypeMap.get(var)); } else if (arguments[i] instanceof WildcardType && i < parameterTypes.length) { logger.info("Replacing wildcard with " + parameterTypes[i]); logger.info("Lower Bounds: " + Arrays.asList(TypeUtils.getImplicitLowerBounds((WildcardType) arguments[i]))); logger.info("Upper Bounds: " + Arrays.asList(TypeUtils.getImplicitUpperBounds((WildcardType) arguments[i]))); logger.info("Type variable: " + variables.get(i)); if (!TypeUtils.isAssignable(parameterTypes[i], arguments[i])) { logger.info("Not assignable to bounds!"); return null; } else { boolean assignable = false; for (Type bound : variables.get(i).getBounds()) { if (TypeUtils.isAssignable(parameterTypes[i], bound)) { assignable = true; break; } } if (!assignable) { logger.info("Not assignable to type variable!"); return null; } } arguments[i] = parameterTypes[i]; } } GenericClass ownerClass = new GenericClass(ownerType).getWithParametersFromSuperclass(superClass); if (ownerClass == null) return null; exactClass.type = new ParameterizedTypeImpl(currentClass, arguments, ownerClass.getType()); } return exactClass; } public GenericClass getWithParameterTypes(List<Type> parameters) { Type[] typeArray = new Type[parameters.size()]; for (int i = 0; i < parameters.size(); i++) { typeArray[i] = parameters.get(i); } Type ownerType = null; if (type instanceof ParameterizedType) { ownerType = ((ParameterizedType) type).getOwnerType(); } return new GenericClass(new ParameterizedTypeImpl(rawClass, typeArray, ownerType)); } public GenericClass getWithParameterTypes(Type[] parameters) { Type ownerType = null; if (type instanceof ParameterizedType) { ownerType = ((ParameterizedType) type).getOwnerType(); } return new GenericClass(new ParameterizedTypeImpl(rawClass, parameters, ownerType)); } public GenericClass getWithWildcardTypes() { Type ownerType = GenericTypeReflector.addWildcardParameters(rawClass); return new GenericClass(ownerType); } private boolean handleGenericArraySpecialCase(Type type) { if (type instanceof GenericArrayType) { // There is some weird problem with generic methods and the component type can be null Type componentType = ((GenericArrayType) type).getGenericComponentType(); if (componentType == null) { this.rawClass = Object[].class; this.type = this.rawClass; return true; } } return false; } /** * Determine if this class is a subclass of superType * * @param superType * @return */ public boolean hasGenericSuperType(GenericClass superType) { return GenericTypeReflector.isSuperType(superType.getType(), type); } /** * Determine if this class is a subclass of superType * * @param superType * @return */ public boolean hasGenericSuperType(Type superType) { return GenericTypeReflector.isSuperType(superType, type); } /* (non-Javadoc) * @see java.lang.Object#hashCode() */ @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + getTypeName().hashCode(); //result = prime * result + ((raw_class == null) ? 0 : raw_class.hashCode()); //result = prime * result + ((type == null) ? 0 : type.hashCode()); return result; } public boolean hasOwnerType() { if (type instanceof ParameterizedType) return ((ParameterizedType) type).getOwnerType() != null; else return false; } public boolean hasTypeVariables() { if (isParameterizedType()) { return hasTypeVariables((ParameterizedType) type); } if (isTypeVariable()) return true; return false; } private boolean hasTypeVariables(ParameterizedType parameterType) { for (Type t : parameterType.getActualTypeArguments()) { if (t instanceof TypeVariable) return true; else if (t instanceof ParameterizedType) { if (hasTypeVariables((ParameterizedType) t)) return true; } } return false; } public boolean hasWildcardOrTypeVariables() { if (isTypeVariable() || isWildcardType()) return true; if (hasWildcardTypes()) return true; if (hasTypeVariables()) return true; if (hasOwnerType()) { if (getOwnerType().hasWildcardOrTypeVariables()) return true; } if (type instanceof GenericArrayType) { if (getComponentClass().hasWildcardOrTypeVariables()) return true; } return false; } private boolean hasWildcardType(ParameterizedType parameterType) { for (Type t : parameterType.getActualTypeArguments()) { if (t instanceof WildcardType) return true; else if (t instanceof ParameterizedType) { if (hasWildcardType((ParameterizedType) t)) return true; } } return false; } public boolean hasWildcardTypes() { if (isParameterizedType()) { return hasWildcardType((ParameterizedType) type); } if (isWildcardType()) return true; return false; } /** * True if this represents an abstract class * * @return */ public boolean isAbstract() { return Modifier.isAbstract(rawClass.getModifiers()); } /** * True if this is an anonymous class * * @return */ public boolean isAnonymous() { return rawClass.isAnonymousClass(); } /** * Return true if variable is an array * * @return a boolean. */ public boolean isArray() { return rawClass.isArray(); } /** * <p> * isAssignableFrom * </p> * * @param rhsType * a {@link GenericClass} object. * @return a boolean. */ public boolean isAssignableFrom(GenericClass rhsType) { return isAssignable(type, rhsType.type); } /** * <p> * isAssignableFrom * </p> * * @param rhsType * a {@link java.lang.reflect.Type} object. * @return a boolean. */ public boolean isAssignableFrom(Type rhsType) { return isAssignable(type, rhsType); } /** * <p> * isAssignableTo * </p> * * @param lhsType * a {@link GenericClass} object. * @return a boolean. */ public boolean isAssignableTo(GenericClass lhsType) { return isAssignable(lhsType.type, type); } /** * <p> * isAssignableTo * </p> * * @param lhsType * a {@link java.lang.reflect.Type} object. * @return a boolean. */ public boolean isAssignableTo(Type lhsType) { return isAssignable(lhsType, type); } /** * True if this represents java.lang.Class * * @return */ public boolean isClass() { return rawClass.equals(Class.class); } /** * Return true if variable is an enumeration * * @return a boolean. */ public boolean isEnum() { return rawClass.isEnum(); } public boolean isGenericArray() { GenericClass componentClass = new GenericClass(rawClass.getComponentType()); return componentClass.hasWildcardOrTypeVariables(); } /** * Determine if subType is a generic subclass * * @param subType * @return */ public boolean isGenericSuperTypeOf(GenericClass subType) { return GenericTypeReflector.isSuperType(type, subType.getType()); } /** * Determine if subType is a generic subclass * * @param subType * @return */ public boolean isGenericSuperTypeOf(Type subType) { return GenericTypeReflector.isSuperType(type, subType); } /** * True is this represents java.lang.Object * * @return */ public boolean isObject() { return rawClass.equals(Object.class); } /** * True if this represents a parameterized generic type * * @return */ public boolean isParameterizedType() { return type instanceof ParameterizedType; } /** * Return true if variable is a primitive type * * @return a boolean. */ public boolean isPrimitive() { return rawClass.isPrimitive(); } /** * True if this is a non-generic type * * @return */ public boolean isRawClass() { return type instanceof Class<?>; } /** * True if this is a type variable * * @return */ public boolean isTypeVariable() { return type instanceof TypeVariable<?>; } /** * True if this is a wildcard type * * @return */ public boolean isWildcardType() { return type instanceof WildcardType; } /** * True if this represents java.lang.String * * @return a boolean. */ public boolean isString() { return rawClass.equals(String.class); } /** * Return true if variable is void * * @return a boolean. */ public boolean isVoid() { return rawClass.equals(Void.class) || rawClass.equals(void.class); } /** * Return true if type of variable is a primitive wrapper * * @return a boolean. */ public boolean isWrapperType() { return WRAPPER_TYPES.contains(rawClass); } public boolean satisfiesBoundaries(TypeVariable<?> typeVariable) { return satisfiesBoundaries(typeVariable, getTypeVariableMap()); } /** * Determine whether the boundaries of the type variable are satisfied by * this class * * @param typeVariable * @return */ public boolean satisfiesBoundaries(TypeVariable<?> typeVariable, Map<TypeVariable<?>, Type> typeMap) { boolean isAssignable = true; // logger.debug("Checking class: " + type + " against type variable " + typeVariable+" with map "+typeMap); Map<TypeVariable<?>, Type> ownerVariableMap = getTypeVariableMap(); for (Type bound : typeVariable.getBounds()) { if (bound instanceof ParameterizedType) { Class<?> boundClass = GenericTypeReflector.erase(bound); if (boundClass.isAssignableFrom(rawClass)) { Map<TypeVariable<?>, Type> xmap = TypeUtils.determineTypeArguments(rawClass, (ParameterizedType) bound); ownerVariableMap.putAll(xmap); } } } ownerVariableMap.putAll(typeMap); boolean changed = true; while (changed) { changed = false; for (TypeVariable<?> var : ownerVariableMap.keySet()) { //logger.debug("Type var: "+var+" of "+var.getGenericDeclaration()); if (ownerVariableMap.get(var) instanceof TypeVariable<?>) { //logger.debug("Is set to type var: "+ownerVariableMap.get(var)+" of "+((TypeVariable<?>)ownerVariableMap.get(var)).getGenericDeclaration()); TypeVariable<?> value = (TypeVariable<?>) ownerVariableMap.get(var); if (ownerVariableMap.containsKey(value)) { Type other = ownerVariableMap.get(value); if (var != other && value != other) { //logger.debug("Replacing "+var+" with "+other); ownerVariableMap.put(var, other); changed = true; } } else { //logger.debug("Not in map: "+value); } } else { //logger.debug("Is set to concrete type: "+ownerVariableMap.get(var)); } } //logger.debug("Current iteration of map: " + ownerVariableMap); } GenericClass concreteClass = new GenericClass(GenericUtils.replaceTypeVariables(type, ownerVariableMap)); //logger.debug("Concrete class after variable replacement: " + concreteClass); for (Type theType : typeVariable.getBounds()) { //logger.debug("Current boundary of " + typeVariable + ": " + theType); // Special case: Enum is defined as Enum<T extends Enum> if (GenericTypeReflector.erase(theType).equals(Enum.class)) { //logger.debug("Is ENUM case"); // if this is an enum then it's ok. if (isEnum()) { //logger.debug("Class " + toString() + " is an enum!"); continue; } else { // If it's not an enum, it cannot be assignable to enum! //logger.debug("Class " + toString() + " is not an enum."); isAssignable = false; break; } } Type boundType = GenericUtils.replaceTypeVariables(theType, ownerVariableMap); boundType = GenericUtils.replaceTypeVariable(boundType, typeVariable, getType()); boundType = GenericUtils.replaceTypeVariablesWithWildcards(boundType); //logger.debug("Bound after variable replacement: " + boundType); if (!concreteClass.isAssignableTo(boundType) && !(boundType instanceof WildcardType)) { //logger.debug("Not assignable: " + type + " and " + boundType); // If the boundary is not assignable it may still be possible // to instantiate the generic to an assignable type if (GenericTypeReflector.erase(boundType).isAssignableFrom(getRawClass())) { //logger.debug("Raw classes are assignable: " + boundType + ", " // + getRawClass()); Type instanceType = GenericTypeReflector.getExactSuperType(boundType, getRawClass()); if (instanceType == null) { // This happens when the raw class is not a supertype // of the boundary //logger.debug("Instance type is null"); isAssignable = false; break; } // GenericClass instanceClass = new GenericClass(instanceType, // getRawClass()); // logger.debug("Instance type is " + instanceType); // if (instanceClass.hasTypeVariables()) // logger.debug("Instance type has type variables"); // if (instanceClass.hasWildcardTypes()) // logger.debug("Instance type has wildcard variables"); boundType = GenericUtils.replaceTypeVariable(theType, typeVariable, instanceType); // logger.debug("Instance type after replacement is " + boundType); if (GenericClass.isAssignable(boundType, instanceType)) { //logger.debug("Found assignable generic exact type: " // + instanceType); continue; } else { //logger.debug("Is not assignable: " + boundType + " and " // + instanceType); } } isAssignable = false; break; } } //logger.debug("Result: is assignable " + isAssignable); return isAssignable; } public boolean satisfiesBoundaries(WildcardType wildcardType) { return satisfiesBoundaries(wildcardType, getTypeVariableMap()); } /** * Determine whether the upper and lower boundaries are satisfied by this * class * * @param wildcardType * @return */ public boolean satisfiesBoundaries(WildcardType wildcardType, Map<TypeVariable<?>, Type> typeMap) { boolean isAssignable = true; Map<TypeVariable<?>, Type> ownerVariableMap = getTypeVariableMap(); ownerVariableMap.putAll(typeMap); // ? extends X for (Type theType : wildcardType.getUpperBounds()) { logger.debug("Checking upper bound " + theType); // Special case: Enum is defined as Enum<T extends Enum> if (GenericTypeReflector.erase(theType).equals(Enum.class)) { // if this is an enum then it's ok. if (isEnum()) continue; else { // If it's not an enum, it cannot be assignable to enum! isAssignable = false; break; } } Type type = GenericUtils.replaceTypeVariables(theType, ownerVariableMap); //logger.debug("Bound after variable replacement: " + type); if (!isAssignableTo(type)) { // If the boundary is not assignable it may still be possible // to instantiate the generic to an assignable type if (GenericTypeReflector.erase(type).isAssignableFrom(getRawClass())) { Type instanceType = GenericTypeReflector.getExactSuperType(type, getRawClass()); if (instanceType == null) { // This happens when the raw class is not a supertype // of the boundary isAssignable = false; break; } if (GenericClass.isAssignable(type, instanceType)) { logger.debug("Found assignable generic exact type: " + instanceType); continue; } } isAssignable = false; break; } } // ? super X Type[] lowerBounds = wildcardType.getLowerBounds(); if (lowerBounds != null && lowerBounds.length > 0) { for (Type theType : wildcardType.getLowerBounds()) { logger.debug("Checking lower bound " + theType); Type type = GenericUtils.replaceTypeVariables(theType, ownerVariableMap); logger.debug("Bound after variable replacement: " + type); logger.debug("Is assignable from " + toString() + "?"); if (!isAssignableFrom(type)) { logger.debug("Not assignable from " + toString()); // If the boundary is not assignable it may still be possible // to instantiate the generic to an assignable type if (type instanceof WildcardType) continue; if (GenericTypeReflector.erase(type).isAssignableFrom(getRawClass())) { Type instanceType = GenericTypeReflector.getExactSuperType(type, getRawClass()); if (instanceType == null) { // This happens when the raw class is not a supertype // of the boundary isAssignable = false; break; } if (GenericClass.isAssignable(type, instanceType)) { logger.debug("Found assignable generic exact type: " + instanceType); continue; } } isAssignable = false; break; } else { logger.debug("Is assignable from " + toString()); } } } return isAssignable; } /** {@inheritDoc} */ @Override public String toString() { if (type == null) { LoggingUtils.getEvoLogger().info("Type is null for raw class " + rawClass); for (StackTraceElement elem : Thread.currentThread().getStackTrace()) { LoggingUtils.getEvoLogger().info(elem.toString()); } assert (false); } return type.toString(); } /** * De-serialize. Need to use current classloader. * * @param ois * @throws ClassNotFoundException * @throws IOException */ private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException { String name = (String) ois.readObject(); if (name == null) { this.rawClass = null; this.type = null; return; } this.rawClass = getClass(name); Boolean isParameterized = (Boolean) ois.readObject(); if (isParameterized) { // GenericClass rawType = (GenericClass) ois.readObject(); GenericClass ownerType = (GenericClass) ois.readObject(); @SuppressWarnings("unchecked") List<GenericClass> parameterClasses = (List<GenericClass>) ois.readObject(); Type[] parameterTypes = new Type[parameterClasses.size()]; for (int i = 0; i < parameterClasses.size(); i++) parameterTypes[i] = parameterClasses.get(i).getType(); this.type = new ParameterizedTypeImpl(rawClass, parameterTypes, ownerType.getType()); } else { this.type = addTypeParameters(rawClass); //GenericTypeReflector.addWildcardParameters(raw_class); } } /** * Serialize, but need to abstract classloader away * * @param oos * @throws IOException */ private void writeObject(ObjectOutputStream oos) throws IOException { if (rawClass == null) { oos.writeObject(null); } else { oos.writeObject(rawClass.getName()); if (type instanceof ParameterizedType) { oos.writeObject(Boolean.TRUE); ParameterizedType pt = (ParameterizedType) type; // oos.writeObject(new GenericClass(pt.getRawType())); oos.writeObject(new GenericClass(pt.getOwnerType())); List<GenericClass> parameterClasses = new ArrayList<GenericClass>(); for (Type parameterType : pt.getActualTypeArguments()) { parameterClasses.add(new GenericClass(parameterType)); } oos.writeObject(parameterClasses); } else { oos.writeObject(Boolean.FALSE); } } } }