Example usage for java.lang Class getComponentType

Introduction

In this page you can find the example usage for java.lang Class getComponentType.

Prototype

public Class<?> getComponentType() 

Source Link

Document

Returns the Class representing the component type of an array.

Usage

From source file:com.jeeframework.util.classes.ClassUtils.java

/**
 * Check if the given class represents an array of primitives,
 * i.e. boolean, byte, char, short, int, long, float, or double.
 * @param clazz the class to check/*from  w w  w .  ja v a2  s.co m*/
 * @return whether the given class is a primitive array class
 */
public static boolean isPrimitiveArray(Class clazz) {
    Assert.notNull(clazz, "Class must not be null");
    return (clazz.isArray() && clazz.getComponentType().isPrimitive());
}

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From source file:ArrayUtils.java

@SuppressWarnings("unchecked")
private static <T, U> T[] copyOfRange(final U[] original, final int from, final int to,
        final Class<? extends T[]> newType) {
    final int newLength = to - from;
    if (newLength < 0) {
        throw new IllegalArgumentException(from + " > " + to);
    }// w w  w  . j ava2 s .  co  m
    final T[] copy = ((Object) newType == (Object) Object[].class) ? (T[]) new Object[newLength]
            : (T[]) Array.newInstance(newType.getComponentType(), newLength);
    System.arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength));
    return copy;
}

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From source file:com.jeeframework.util.classes.ClassUtils.java

/**
 * Check if the given class represents an array of primitive wrappers,
 * i.e. Boolean, Byte, Character, Short, Integer, Long, Float, or Double.
 * @param clazz the class to check/*from  w  ww  .  j a  v a2s. c  om*/
 * @return whether the given class is a primitive wrapper array class
 */
public static boolean isPrimitiveWrapperArray(Class clazz) {
    Assert.notNull(clazz, "Class must not be null");
    return (clazz.isArray() && isPrimitiveWrapper(clazz.getComponentType()));
}

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From source file:com.swingtech.commons.testing.JavaBeanTester.java

private static Object buildValue(Class<?> clazz) throws InstantiationException, IllegalAccessException,
        IllegalArgumentException, SecurityException, InvocationTargetException {
    // If we are using a Mocking framework try that first...
    final Object mockedObject = buildMockValue(clazz);
    if (mockedObject != null) {
        return mockedObject;
    }//from  ww w .  j  av a  2 s  .com

    // Next check for a no-arg constructor
    final Constructor<?>[] ctrs = clazz.getConstructors();
    for (Constructor<?> ctr : ctrs) {
        if (ctr.getParameterTypes().length == 0) {
            // The class has a no-arg constructor, so just call it
            return ctr.newInstance();
        }
    }

    // Specific rules for common classes
    if (clazz == String.class) {
        return "testvalue";

    } else if (clazz.isArray()) {
        return Array.newInstance(clazz.getComponentType(), 1);

    } else if (clazz == boolean.class || clazz == Boolean.class) {
        return true;

    } else if (clazz == int.class || clazz == Integer.class) {
        return 1;

    } else if (clazz == long.class || clazz == Long.class) {
        return 1L;

    } else if (clazz == double.class || clazz == Double.class) {
        return 1.0D;

    } else if (clazz == float.class || clazz == Float.class) {
        return 1.0F;

    } else if (clazz == char.class || clazz == Character.class) {
        return 'Y';

        // Add your own rules here

    } else {
        fail("Unable to build an instance of class " + clazz.getName() + ", please add some code to the "
                + JavaBeanTester.class.getName() + " class to do this.");
        return null; // for the compiler
    }
}

---

From source file:com.gzj.tulip.jade.rowmapper.ArrayRowMapper.java

public ArrayRowMapper(Class<?> returnType) {
    this.componentType = returnType.getComponentType();
}

---

From source file:com.bstek.dorado.data.entity.EntityUtils.java

/**
 * ???/*from ww  w .  j ava  2 s. co  m*/
 */
public static boolean isSimpleType(Class<?> cl) {
    boolean b = (String.class.equals(cl) || cl.isPrimitive() || Boolean.class.equals(cl)
            || Number.class.isAssignableFrom(cl) || cl.isEnum() || Date.class.isAssignableFrom(cl)
            || Character.class.isAssignableFrom(cl));
    if (!b && cl.isArray()) {
        b = isSimpleType(cl.getComponentType());
    }
    return b;
}

---

From source file:org.apache.hadoop.hive.metastore.VerifyingObjectStore.java

private static void dumpObject(StringBuilder errorStr, String name, Object p, Class<?> c, int level)
        throws IllegalAccessException {
    String offsetStr = repeat("  ", level);
    if (p == null || c == String.class || c.isPrimitive() || ClassUtils.wrapperToPrimitive(c) != null) {
        errorStr.append(offsetStr).append(name + ": [" + p + "]\n");
    } else if (ClassUtils.isAssignable(c, Iterable.class)) {
        errorStr.append(offsetStr).append(name + " is an iterable\n");
        Iterator<?> i1 = ((Iterable<?>) p).iterator();
        int i = 0;
        while (i1.hasNext()) {
            Object o1 = i1.next();
            Class<?> t = o1 == null ? Object.class : o1.getClass(); // ...
            dumpObject(errorStr, name + "[" + (i++) + "]", o1, t, level + 1);
        }/*from ww w . ja  v a2 s  . c  o m*/
    } else if (c.isArray()) {
        int len = Array.getLength(p);
        Class<?> t = c.getComponentType();
        errorStr.append(offsetStr).append(name + " is an array\n");
        for (int i = 0; i < len; ++i) {
            dumpObject(errorStr, name + "[" + i + "]", Array.get(p, i), t, level + 1);
        }
    } else if (ClassUtils.isAssignable(c, Map.class)) {
        Map<?, ?> c1 = (Map<?, ?>) p;
        errorStr.append(offsetStr).append(name + " is a map\n");
        dumpObject(errorStr, name + ".keys", c1.keySet(), Set.class, level + 1);
        dumpObject(errorStr, name + ".vals", c1.values(), Collection.class, level + 1);
    } else {
        errorStr.append(offsetStr).append(name + " is of type " + c.getCanonicalName() + "\n");
        // TODO: this doesn't include superclass.
        Field[] fields = c.getDeclaredFields();
        AccessibleObject.setAccessible(fields, true);
        for (int i = 0; i < fields.length; i++) {
            Field f = fields[i];
            if (f.getName().indexOf('$') != -1 || Modifier.isStatic(f.getModifiers()))
                continue;
            dumpObject(errorStr, name + "." + f.getName(), f.get(p), f.getType(), level + 1);
        }
    }
}

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From source file:com.feilong.commons.core.lang.ClassUtil.java

/**
 *  class info map for log./*from  w  w w  . j  a  v  a  2s . c o m*/
 *
 * @param klass
 *            the clz
 * @return the map for log
 */
public static Map<String, Object> getClassInfoMapForLog(Class<?> klass) {

    Map<String, Object> map = new LinkedHashMap<String, Object>();

    //"clz.getCanonicalName()": "com.feilong.commons.core.date.DatePattern",
    //"clz.getName()": "com.feilong.commons.core.date.DatePattern",
    //"clz.getSimpleName()": "DatePattern",

    // getCanonicalName ( Java Language Specification ??) && getName
    //??class?array?
    // getName[[Ljava.lang.String?getCanonicalName?
    map.put("clz.getCanonicalName()", klass.getCanonicalName());
    map.put("clz.getName()", klass.getName());
    map.put("clz.getSimpleName()", klass.getSimpleName());

    map.put("clz.getComponentType()", klass.getComponentType());
    // ?? voidboolean?byte?char?short?int?long?float  double?
    map.put("clz.isPrimitive()", klass.isPrimitive());

    // ??,
    map.put("clz.isLocalClass()", klass.isLocalClass());
    // ????,??????
    map.put("clz.isMemberClass()", klass.isMemberClass());

    //isSynthetic()?Class????java??false?trueJVM???java??????
    map.put("clz.isSynthetic()", klass.isSynthetic());
    map.put("clz.isArray()", klass.isArray());
    map.put("clz.isAnnotation()", klass.isAnnotation());

    //??true
    map.put("clz.isAnonymousClass()", klass.isAnonymousClass());
    map.put("clz.isEnum()", klass.isEnum());

    return map;
    //      Class<?> klass = this.getClass();
    //
    //      TypeVariable<?>[] typeParameters = klass.getTypeParameters();
    //      TypeVariable<?> typeVariable = typeParameters[0];
    //
    //      Type[] bounds = typeVariable.getBounds();
    //
    //      Type bound = bounds[0];
    //
    //      if (log.isDebugEnabled()){
    //         log.debug("" + (bound instanceof ParameterizedType));
    //      }
    //
    //      Class<T> modelClass = ReflectUtil.getGenericModelClass(klass);
    //      return modelClass;
}

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From source file:info.novatec.testit.livingdoc.converter.ArrayConverter.java

protected boolean isArray(Class<?> type) {
    return type.getComponentType() != null;
}

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From source file:com.laxser.blitz.web.paramresolver.ResolverFactoryImpl.java

private static boolean addIndexAliasParamNameIfNeccessary(ParamMetaData metaData) {
    Class<?>[] paramTypes = metaData.getMethod().getParameterTypes();
    int index = metaData.getIndex(); // index0
    int uriParamIndex = 0; // uriParamIndex**1**
    int breakIndex = 0;// breakIndex0
    for (; breakIndex < paramTypes.length && breakIndex <= index; breakIndex++) {
        Class<?> type = paramTypes[breakIndex];
        if (type.isArray()) {
            type = type.getComponentType();
        } else if (Collection.class.isAssignableFrom(type)) {
            Class<?>[] generics = compileGenericParameterTypesDetail(metaData.getMethod(), breakIndex);
            if (generics == null) {
                return false;
            }/*from   w w w.  ja  v  a  2 s .c o m*/
            Assert.isTrue(generics.length > 0);
            type = generics[0];
        }
        if (ClassUtils.isPrimitiveOrWrapper(type) || type == String.class
                || Date.class.isAssignableFrom(type)) {
            uriParamIndex++;
        }
    }
    if ((breakIndex - 1) == index && uriParamIndex > 0) {
        String alias = "$" + uriParamIndex;
        metaData.addAliasParamName(alias);
        if (logger.isDebugEnabled()) {
            logger.debug("add index alias paramName: '" + alias + "' for "
                    + metaData.getControllerClass().getName() + "." + metaData.getMethod().getName() + "(..."
                    + metaData.getParamType() + "[index=" + breakIndex + "] ...)");
        }
        return true;
    }
    return false;
}

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