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App55 client library for the Java platform.
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/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.
 */

package org.apache.harmony.beans;

import java.lang.reflect.Method;
import java.util.Arrays;

public class BeansUtils
{

	public static final Object[]	EMPTY_OBJECT_ARRAY	= new Object[0];

	public static final String		NEW					= "new";			//$NON-NLS-1$

	public static final String		NEWINSTANCE			= "newInstance";	//$NON-NLS-1$

	public static final String		NEWARRAY			= "newArray";		//$NON-NLS-1$

	public static final String		FORNAME				= "forName";		//$NON-NLS-1$

	public static final String		GET					= "get";			//$NON-NLS-1$

	public static final String		IS					= "is";			//$NON-NLS-1$

	public static final String		SET					= "set";			//$NON-NLS-1$

	public static final String		ADD					= "add";			//$NON-NLS-1$

	public static final String		PUT					= "put";			//$NON-NLS-1$

	public static final String		NULL				= "null";			//$NON-NLS-1$

	public static final String		QUOTE				= "\"\"";			//$NON-NLS-1$

	public static final int getHashCode(Object obj)
	{
		return obj != null ? obj.hashCode() : 0;
	}

	public static final int getHashCode(boolean bool)
	{
		return bool ? 1 : 0;
	}

	public static String toASCIILowerCase(String string)
	{
		char[] charArray = string.toCharArray();
		StringBuilder sb = new StringBuilder(charArray.length);
		for (int index = 0; index < charArray.length; index++)
		{
			if ('A' <= charArray[index] && charArray[index] <= 'Z')
			{
				sb.append((char) (charArray[index] + ('a' - 'A')));
			}
			else
			{
				sb.append(charArray[index]);
			}
		}
		return sb.toString();
	}

	public static String toASCIIUpperCase(String string)
	{
		char[] charArray = string.toCharArray();
		StringBuilder sb = new StringBuilder(charArray.length);
		for (int index = 0; index < charArray.length; index++)
		{
			if ('a' <= charArray[index] && charArray[index] <= 'z')
			{
				sb.append((char) (charArray[index] - ('a' - 'A')));
			}
			else
			{
				sb.append(charArray[index]);
			}
		}
		return sb.toString();
	}

	public static boolean isPrimitiveWrapper(Class wrapper, Class base)
	{
		return (base == boolean.class) && (wrapper == Boolean.class) || (base == byte.class) && (wrapper == Byte.class) || (base == char.class)
				&& (wrapper == Character.class) || (base == short.class) && (wrapper == Short.class) || (base == int.class) && (wrapper == Integer.class)
				|| (base == long.class) && (wrapper == Long.class) || (base == float.class) && (wrapper == Float.class) || (base == double.class)
				&& (wrapper == Double.class);
	}

	private static final String		EQUALS_METHOD		= "equals";

	private static final Class[]	EQUALS_PARAMETERS	= new Class[] { Object.class };

	public static boolean declaredEquals(Class clazz)
	{
		for (Method declaredMethod : clazz.getDeclaredMethods())
		{
			if (EQUALS_METHOD.equals(declaredMethod.getName()) && Arrays.equals(declaredMethod.getParameterTypes(), EQUALS_PARAMETERS))
			{
				return true;
			}
		}
		return false;
	}

	public static String idOfClass(Class clazz)
	{
		Class theClass = clazz;
		StringBuilder sb = new StringBuilder();
		if (theClass.isArray())
		{
			do
			{
				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();
	}
}