Ant example source code file (DemuxInputStream.java)

This example Ant source code file (DemuxInputStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

demuxinputstream, demuxinputstream, inputstream, inputstream, io, ioexception, ioexception, project, project

The DemuxInputStream.java source code

/*
 *  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.tools.ant;

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

/**
 *
 * Passes input requests to the project object for demuxing into
 * individual tasks and threads.
 *
 * @since Ant 1.6
 */
public class DemuxInputStream extends InputStream {

    /**
     * The project to from which to get input.
     */
    private Project project;

    /**
     * Create a DemuxInputStream for the given project
     *
     * @param project the project instance
     */
    public DemuxInputStream(Project project) {
        this.project = project;
    }

    /**
     * Read a byte from the project's demuxed input.
     * @return the next byte
     * @throws IOException on error
     */
    public int read() throws IOException {
        byte[] buffer = new byte[1];
        if (project.demuxInput(buffer, 0, 1) == -1) {
            return -1;
        }
        return buffer[0];
    }


    /**
     * Read bytes from the project's demuxed input.
     * @param buffer an array of bytes to read into
     * @param offset the offset in the array of bytes
     * @param length the number of bytes in the array
     * @return the number of bytes read
     * @throws IOException on error
     */
    public int read(byte[] buffer, int offset, int length) throws IOException {
        return project.demuxInput(buffer, offset, length);
    }

}