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:Main.java

public static Class<?> inferFromArrayType(final Class<?> type) {
    if (!isArrayType(type)) {
        return null;
    }/*from   w ww  .  j a v a2  s.  c  om*/
    if (type.isArray()) {
        final Class<?> componentType = type.getComponentType();
        return componentType;
    }
    return null;
}

From source file:org.apache.sling.nosql.generic.resource.impl.NoSqlValueMap.java

static boolean isValidType(Class clazz) {
    if (clazz.isArray()) {
        if (clazz.getComponentType() == byte.class) {
            // byte only supported as array
            return true;
        }/*from  w  w w . j  a  v a 2  s.  c  om*/
        return isValidType(clazz.getComponentType());
    } else {
        return clazz == String.class || clazz == Integer.class || clazz == Long.class || clazz == Double.class
                || clazz == Boolean.class || Calendar.class.isAssignableFrom(clazz);
    }
}

From source file:ShowClass.java

/** Return the name of an interface or primitive type, handling arrays. */
public static String typename(Class t) {
    String brackets = "";
    while (t.isArray()) {
        brackets += "[]";
        t = t.getComponentType();
    }//from w ww.  j a  v a2s . com
    String name = t.getName();
    int pos = name.lastIndexOf('.');
    if (pos != -1)
        name = name.substring(pos + 1);
    return name + brackets;
}

From source file:Main.java

/**
 * Extracts the package name from the given class object
 *//*  w w  w .  jav  a 2s.  c  o m*/
public static String getPackage(Class<?> cls) {
    // cls.getPackage() sometimes returns null, in which case fall back to string massaging.
    java.lang.Package pkg = cls.isArray() ? cls.getComponentType().getPackage() : cls.getPackage();
    if (pkg == null) {
        int dotPos;
        int dolPos = cls.getName().indexOf('$');
        if (dolPos > 0) {
            // we have nested classes, so adjust dotpos to before first $
            dotPos = cls.getName().substring(0, dolPos).lastIndexOf('.');
        } else {
            dotPos = cls.getName().lastIndexOf('.');
        }

        if (dotPos > 0) {
            return cls.getName().substring(0, dotPos);
        } else {
            // must be default package.
            return "";
        }
    } else {
        return pkg.getName();
    }
}

From source file:org.apache.sling.contextaware.config.spi.metadata.PropertyMetadata.java

private static boolean isSupportedType(Class<?> paramType) {
    if (paramType.isArray()) {
        return isSupportedType(paramType.getComponentType());
    }//from w  w w  .j ava2 s  .  c  om
    for (Class<?> type : SUPPORTED_TYPES) {
        if (type.equals(paramType)) {
            return true;
        }
    }
    if (paramType == ConfigurationMetadata.class) {
        return true;
    }
    return false;
}

From source file:Main.java

public static Object copyArray(final Object input) {
    final Class type = input.getClass();
    if (!type.isArray()) {
        throw new IllegalArgumentException();
    }//from w w w . ja v a 2 s  . c om
    final int length = Array.getLength(input);
    final Class componentType = type.getComponentType();

    final Object result = Array.newInstance(componentType, length);
    for (int idx = 0; idx < length; idx++) {
        Array.set(result, idx, Array.get(input, idx));
    }
    return result;
}

From source file:Main.java

public static <T, U> T[] copyOf(U[] original, int newLength, Class<? extends T[]> newType) {
    T[] copy = (Object) newType == (Object) Object[].class ? (T[]) new Object[newLength]
            : (T[]) Array.newInstance(newType.getComponentType(), newLength);
    System.arraycopy(original, 0, copy, 0, Math.min(original.length, newLength));
    return copy;/*from w  w w.jav  a  2 s.com*/
}

From source file:Main.java

private static boolean isSimpleObjectClass(Class<?> objectClass) {
    if (objectClass.isArray()) {
        return isSimpleObjectClass(objectClass.getComponentType());
    } else {/*from w w  w  . j av a2  s.c  o m*/
        return objectClass.isPrimitive() || CharSequence.class.isAssignableFrom(objectClass)
                || Character.class.isAssignableFrom(objectClass) || Boolean.class.isAssignableFrom(objectClass)
                || Number.class.isAssignableFrom(objectClass);
    }
}

From source file:Main.java

/**
 * @return an Object array for the given object.
 *
 * @param obj  Object to convert to an array.  Converts primitive
 *             arrays to Object arrays consisting of their wrapper
 *             classes.  If the object is not an array (object or primitve)
 *             then a new array of the given type is created and the
 *             object is set as the sole element.
 *//*from  ww  w.j a va  2  s .  c o  m*/
public static Object[] toArray(final Object obj) {
    // if the object is an array, the cast and return it.
    if (obj instanceof Object[]) {
        return (Object[]) obj;
    }

    // if the object is an array of primitives then wrap the array
    Class type = obj.getClass();
    Object array;
    if (type.isArray()) {
        int length = Array.getLength(obj);
        Class componentType = type.getComponentType();
        array = Array.newInstance(componentType, length);
        for (int i = 0; i < length; i++) {
            Array.set(array, i, Array.get(obj, i));
        }
    } else {
        array = Array.newInstance(type, 1);
        Array.set(array, 0, obj);
    }

    return (Object[]) array;
}

From source file:Main.java

public static String idOfClass(Class<?> clazz) {
    Class<?> theClass = clazz;
    StringBuilder sb = new StringBuilder();
    if (theClass.isArray()) {
        do {//from  w w  w .ja va  2s .c  om
            sb.append("Array"); //$NON-NLS-1$
            theClass = theClass.getComponentType();
        } while (theClass.isArray());
    }
    String clazzName = theClass.getName();
    clazzName = clazzName.substring(clazzName.lastIndexOf('.') + 1);
    return clazzName + sb.toString();
}