get Classes Iterator from Package - Java Reflection

Java examples for Reflection:Class

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Description

get Classes Iterator from Package

Demo Code

/*/*from  ww w.j a  v a2 s .  c om*/
 * 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.
 */
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.annotation.Annotation;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;

public class Main{

    /**
     * @param packageName Package through which to iterate
     * @return Iterator through the classes of this jar file (if executed from
     *         jar) or through the classes of org package (if .class file is
     *         executed)
     */
    public static Iterator<Class<?>> getClassesIterator(String packageName) {
        if (isExecutedFromJar()) {
            try {
                return new JarClassesIterator(packageName);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        } else {
            return new GeneralClassesIterator(packageName);
        }
    }
    /**
     * @return Whether or not the code is executed from jar file
     */
    private static boolean isExecutedFromJar() {
        return AnnotationUtils.class.getResource("AnnotationUtils.class")
                .getProtocol().equals("jar");
    }
}

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