src/main/org/apache/tools/ant/taskdefs/TaskOutputStream.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000,2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.Task;
import java.io.OutputStream;
import java.io.IOException;

/**
 * Redirects text written to a stream thru the standard
 * ant logging mechanism. This class is useful for integrating
 * with tools that write to System.out and System.err. For example,
 * the following will cause all text written to System.out to be
 * logged with "info" priority:
 * <pre>System.setOut(new PrintStream(new TaskOutputStream(project, Project.MSG_INFO)));</pre>
 *
 * <p><strong>As of Ant 1.2, this class is considered to be dead code
 * by the Ant developers and is unmaintained.  Don't use
 * it.</strong></p>
 *
 * @author James Duncan Davidson (duncan@x180.com)
 * @deprecated use LogOutputStream instead.
 */

public class TaskOutputStream extends OutputStream {

    private Task task;
    private StringBuffer line;
    private int msgOutputLevel;

    /**
     * Constructs a new JavacOutputStream with the given project
     * as the output source for messages.
     */

    TaskOutputStream(Task task, int msgOutputLevel) {
        System.err.println("As of Ant 1.2 released in October 2000, the TaskOutputStream class");
        System.err.println("is considered to be dead code by the Ant developers and is unmaintained.");
        System.err.println("Don\'t use it!");

        this.task = task;
        this.msgOutputLevel = msgOutputLevel;

        line = new StringBuffer();
    }

    /**
     * Write a character to the output stream. This method looks
     * to make sure that there isn't an error being reported and
     * will flush each line of input out to the project's log stream.
     */

    public void write(int c) throws IOException {
        char cc = (char) c;
        if (cc == '\r' || cc == '\n') {
            // line feed
            if (line.length() > 0) {
                processLine();
            }
        } else {
            line.append(cc);
        }
    }

    /**
     * Processes a line of input and determines if an error occured.
     */

    private void processLine() {
        String s = line.toString();
        task.log(s, msgOutputLevel);
        line = new StringBuffer();
    }
}