org.javaan.bytecode.ReflectionClassContextBuilder.java Source code

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Here is the source code for org.javaan.bytecode.ReflectionClassContextBuilder.java

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package org.javaan.bytecode;

/*
 * #%L
 * Java Static Code Analysis
 * %%
 * Copyright (C) 2013 Andreas Behnke
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.lang.reflect.Constructor;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.lang3.ClassUtils;
import org.javaan.model.ClassContext;
import org.javaan.model.Clazz;
import org.javaan.model.Interface;
import org.javaan.model.Method;
import org.javaan.model.NamedObjectMap;
import org.javaan.model.NamedObjectRepository;
import org.javaan.model.Type;

/**
 * Provides methods for adding {@link Interface}s and {@link Clazz}es to {@link ClassContext}.
 * Tries to resolve references using the provided {@link NamedObjectMap} types. If a type
 * is not found in that repository, tries to resolve type using java reflection and type loading.
 */
class ReflectionClassContextBuilder {

    private static final String JAVA_LANG_OBJECT = "java.lang.Object";

    private final ClassContext context;

    private final NamedObjectRepository<Type> types;

    private final Set<String> missingTypes = new HashSet<String>();

    public ReflectionClassContextBuilder(ClassContext context, NamedObjectRepository<Type> types) {
        this.context = context;
        this.types = types;
    }

    public Set<String> getMissingTypes() {
        return missingTypes;
    }

    private void addMethods(Type type, Class<?> clazz) {
        clazz.getMethods();
        for (java.lang.reflect.Method method : clazz.getDeclaredMethods()) {
            context.addMethod(Method.create(type, method));
        }
        for (Constructor<?> constructor : clazz.getConstructors()) {
            context.addMethod(Method.create(type, constructor));
        }
    }

    private Type createTypeFromClass(String className) {
        Type type = null;
        try {
            Class<?> clazz = Class.forName(className);
            if (clazz.isInterface()) {
                type = new Interface(className);
                Class<?>[] superInterfaces = clazz.getInterfaces();
                addInterface((Interface) type,
                        ClassUtils.convertClassesToClassNames(Arrays.asList(superInterfaces)));
                addMethods(type, clazz);
            } else {
                type = new Clazz(className);
                Class<?> superClass = clazz.getSuperclass();
                String superClassName = (superClass == null) ? null : superClass.getName();
                Class<?>[] implementedInterfaces = clazz.getInterfaces();
                addClass((Clazz) type, superClassName,
                        ClassUtils.convertClassesToClassNames(Arrays.asList(implementedInterfaces)));
                addMethods(type, clazz);
            }
        } catch (ClassNotFoundException e) {
            missingTypes.add(className);
            return null;
        }
        return type;
    }

    public Type getType(String name) {
        if (missingTypes.contains(name)) {
            return null;
        }
        Type type = types.get(name);
        if (type == null) {
            type = context.get(name);
        }
        if (type == null) {
            type = createTypeFromClass(name);
        }
        return type;
    }

    public void addClass(Clazz clazz, String superClassName, List<String> interfaceNames) {
        if (superClassName == null) {
            superClassName = JAVA_LANG_OBJECT;
        }
        if (JAVA_LANG_OBJECT.equals(clazz.getName())) {
            context.addClass(clazz);
        } else {
            Clazz superClass = (Clazz) getType(superClassName);
            if (superClass == null) {
                context.addClass(clazz);
            } else {
                context.addSuperClass(clazz, superClass);
            }
        }
        if (interfaceNames != null) {
            for (String interfaceName : interfaceNames) {
                Interface interfaze = (Interface) getType(interfaceName);
                if (interfaze != null) {
                    context.addInterface(interfaze);
                    context.addInterfaceOfClass(clazz, interfaze);
                }
            }
        }
    }

    public void addInterface(Interface interfaze, List<String> superInterfaces) {
        context.addInterface(interfaze);
        for (String superInterfaceName : superInterfaces) {
            Interface superInterface = (Interface) getType(superInterfaceName);
            if (superInterface != null) {
                context.addSuperInterface(interfaze, superInterface);
            }
        }
    }
}