architecture.common.util.ClassUtils.java Source code

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Here is the source code for architecture.common.util.ClassUtils.java

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/*
 * Copyright 2012 Donghyuck, Son
 *
 * Licensed 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 architecture.common.util;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ClassUtils extends org.apache.commons.lang3.ClassUtils {

    private static final Log log = LogFactory.getLog(ClassUtils.class);

    public static InputStream getResourceAsStream(String name) {
        return loadResource(name);
    }

    public static InputStream loadResource(String name) {
        InputStream in = ClassUtils.class.getResourceAsStream(name);
        if (in == null) {
            in = Thread.currentThread().getContextClassLoader().getResourceAsStream(name);
            if (in == null)
                in = ClassUtils.class.getClassLoader().getResourceAsStream(name);
        }
        if (in == null)
            try {

            } catch (Throwable e) {
                log.warn(L10NUtils.format("002202", name), e);
            }
        return in;
    }

    public static InputStream getResourceAsStream(String resourceName, Class callingClass) {
        URL url = getResource(resourceName, callingClass);
        try {
            return url == null ? null : url.openStream();
        } catch (IOException e) {
            return null;
        }
    }

    public static URL getResource(String resourceName, Class callingClass) {
        URL url = Thread.currentThread().getContextClassLoader().getResource(resourceName);
        if (url == null)
            url = ClassUtils.class.getClassLoader().getResource(resourceName);
        if (url == null)
            url = callingClass.getClassLoader().getResource(resourceName);
        return url;
    }

    /**
     * Finds all super classes and interfaces for a given class
     * 
     * @param cls
     *            The class to scan
     * @return The collected related classes found
     */
    public static Set<Class> findAllTypes(Class cls) {
        final Set<Class> types = new HashSet<Class>();
        findAllTypes(cls, types);
        return types;
    }

    /**
     * Finds all super classes and interfaces for a given class
     * 
     * @param cls
     *            The class to scan
     * @param types
     *            The collected related classes found
     */
    public static void findAllTypes(Class cls, Set<Class> types) {
        if (cls == null) {
            return;
        }

        // check to ensure it hasn't been scanned yet
        if (types.contains(cls)) {
            return;
        }

        types.add(cls);

        findAllTypes(cls.getSuperclass(), types);
        for (int x = 0; x < cls.getInterfaces().length; x++) {
            findAllTypes(cls.getInterfaces()[x], types);
        }
    }
}