org.apache.wicket.util.lang.Classes.java Source code

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Here is the source code for org.apache.wicket.util.lang.Classes.java

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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.wicket.util.lang;

/**
 * Utilities for dealing with classes.
 * 
 * @author Jonathan Locke
 */
public final class Classes {

    /**
     * Gets the name of the given class or null if the class is null.
     * 
     * @param c
     *            The class
     * @return The class name
     */
    public static String name(Class<?> c) {
        String name = null;
        if (c != null) {
            while (c.isAnonymousClass()) {
                c = c.getSuperclass();
            }
            name = c.getName();
        }

        return name;
    }

    /**
     * Gets the simple name (without the package) of the given class or null if the class is null.
     *
     * @param c
     *            The class
     * @return The class simple name
     */
    public static String simpleName(Class<?> c) {
        String simpleName = null;
        if (c != null) {
            while (c.isAnonymousClass()) {
                c = c.getSuperclass();
            }
            simpleName = c.getSimpleName();
        }

        return simpleName;
    }

    /**
     * Takes a Class and a relative path to a class and returns any class at that relative path. For
     * example, if the given Class was java.lang.System and the relative path was "../util/List",
     * then the java.util.List class would be returned.
     * 
     * @param scope
     *            The package to start at
     * @param path
     *            The relative path to the class
     * @return The class
     * @throws ClassNotFoundException
     */
    public static Class<?> relativeClass(final Class<?> scope, final String path) throws ClassNotFoundException {
        return Class.forName(Packages.absolutePath(scope, path).replace('/', '.'));
    }

    /**
     * Instantiation not allowed
     */
    private Classes() {
    }
}