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	/*
	* Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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 General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package com.sun.beans.finder;

	import static sun.reflect.misc.ReflectUtil.checkPackageAccess;

	/**
	* This is utility class that provides {@code static} methods
	* to find a class with the specified name using the specified class loader.
	*
	* @since 1.7
	*
	* @author Sergey A. Malenkov
	*/
	public final class ClassFinder {

	/**
	* Returns the {@code Class} object associated
	* with the class or interface with the given string name,
	* using the default class loader.
	* <p>
	* The {@code name} can denote an array class
	* (see {@link Class#getName} for details).
	*
	* @param name fully qualified name of the desired class
	* @return class object representing the desired class
	*
	* @throws ClassNotFoundException if the class cannot be located
	* by the specified class loader
	*
	* @see Class#forName(String)
	* @see Class#forName(String,boolean,ClassLoader)
	* @see ClassLoader#getSystemClassLoader()
	* @see Thread#getContextClassLoader()
	*/
	public static Class<?> findClass(String name) throws ClassNotFoundException {
	checkPackageAccess(name);
	try {
	ClassLoader loader = Thread.currentThread().getContextClassLoader();
	if (loader == null) {
	// can be null in IE (see 6204697)
	loader = ClassLoader.getSystemClassLoader();
	}
	if (loader != null) {
	return Class.forName(name, false, loader);
	}

	} catch (ClassNotFoundException exception) {
	// use current class loader instead
	} catch (SecurityException exception) {
	// use current class loader instead
	}
	return Class.forName(name);
	}

	/**
	* Returns the {@code Class} object associated with
	* the class or interface with the given string name,
	* using the given class loader.
	* <p>
	* The {@code name} can denote an array class
	* (see {@link Class#getName} for details).
	* <p>
	* If the parameter {@code loader} is null,
	* the class is loaded through the default class loader.
	*
	* @param name fully qualified name of the desired class
	* @param loader class loader from which the class must be loaded
	* @return class object representing the desired class
	*
	* @throws ClassNotFoundException if the class cannot be located
	* by the specified class loader
	*
	* @see #findClass(String,ClassLoader)
	* @see Class#forName(String,boolean,ClassLoader)
	*/
	public static Class<?> findClass(String name, ClassLoader loader) throws ClassNotFoundException {
	checkPackageAccess(name);
	if (loader != null) {
	try {
	return Class.forName(name, false, loader);
	} catch (ClassNotFoundException exception) {
	// use default class loader instead
	} catch (SecurityException exception) {
	// use default class loader instead
	}
	}
	return findClass(name);
	}

	/**
	* Returns the {@code Class} object associated
	* with the class or interface with the given string name,
	* using the default class loader.
	* <p>
	* The {@code name} can denote an array class
	* (see {@link Class#getName} for details).
	* <p>
	* This method can be used to obtain
	* any of the {@code Class} objects
	* representing {@code void} or primitive Java types:
	* {@code char}, {@code byte}, {@code short},
	* {@code int}, {@code long}, {@code float},
	* {@code double} and {@code boolean}.
	*
	* @param name fully qualified name of the desired class
	* @return class object representing the desired class
	*
	* @throws ClassNotFoundException if the class cannot be located
	* by the specified class loader
	*
	* @see #resolveClass(String,ClassLoader)
	*/
	public static Class<?> resolveClass(String name) throws ClassNotFoundException {
	return resolveClass(name, null);
	}

	/**
	* Returns the {@code Class} object associated with
	* the class or interface with the given string name,
	* using the given class loader.
	* <p>
	* The {@code name} can denote an array class
	* (see {@link Class#getName} for details).
	* <p>
	* If the parameter {@code loader} is null,
	* the class is loaded through the default class loader.
	* <p>
	* This method can be used to obtain
	* any of the {@code Class} objects
	* representing {@code void} or primitive Java types:
	* {@code char}, {@code byte}, {@code short},
	* {@code int}, {@code long}, {@code float},
	* {@code double} and {@code boolean}.
	*
	* @param name fully qualified name of the desired class
	* @param loader class loader from which the class must be loaded
	* @return class object representing the desired class
	*
	* @throws ClassNotFoundException if the class cannot be located
	* by the specified class loader
	*
	* @see #findClass(String,ClassLoader)
	* @see PrimitiveTypeMap#getType(String)
	*/
	public static Class<?> resolveClass(String name, ClassLoader loader) throws ClassNotFoundException {
	Class<?> type = PrimitiveTypeMap.getType(name);
	return (type == null)
	? findClass(name, loader)
	: type;
	}

	/**
	* Disable instantiation.
	*/
	private ClassFinder() {
	}
	}

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