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/* ClassFileIterator.java
 *
 * Created: 2011-10-10 (Year-Month-Day)
 * Character encoding: UTF-8
 *
 ****************************************** LICENSE *******************************************
 *
 * Copyright (c) 2011 - 2013 XIAM Solutions B.V. (http://www.xiam.nl)
 *
 * 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.
 *
 * Modified 2014, dorkbox, llc
 */
package dorkbox.annotation;

import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;

/**
 * {@code ClassFileIterator} is used to iterate over all Java ClassFile files available within
 * a specific context.
 * 
 * For every Java ClassFile ({@code .class}) an {@link InputStream} is returned.
 *
 * @author Ronald K. Muller
 * @since annotation-detector 3.0.0
 */
public
interface ClassIterator {

    /**
     * Return the name of the Java ClassFile returned from the last call to {@link #next(FilenameFilter)}.
     * The name is either the path name of a file or the name of an ZIP/JAR file entry.
     */
    String getName();

    /**
     * Return {@code true} if the current {@link InputStream} is reading from a plain
     * {@link File}.
     * Return {@code false} if the current {@link InputStream} is reading from a
     * ZIP File Entry.
     */
    boolean isFile();

    /**
     * Return the next Java ClassFile as an {@code InputStream}.
     * 
     * NOTICE: Client code MUST close the returned {@code InputStream}!
     */
    InputStream next(final FilenameFilter filter) throws IOException;
}