org.apache.maven.shared.release.exec.TeeConsumer Maven / Gradle / Ivy

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/*
 * 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.maven.shared.release.exec;

import java.io.PrintStream;

import org.codehaus.plexus.util.cli.StreamConsumer;

/**
 * Consumer that both funnels to System.out/err, and stores in an internal buffer.
 *
 * @author Brett Porter
 */
public class TeeConsumer implements StreamConsumer {
    private final PrintStream stream;

    /**
     * @noinspection StringBufferField
     */
    private final StringBuffer content = new StringBuffer();

    private static final String LS = System.getProperty("line.separator");

    private final String indent;

    /**
     * Constructor for TeeConsumer.
     *
     * @param stream a {@link java.io.PrintStream} object
     */
    public TeeConsumer(PrintStream stream) {
        this(stream, "    ");
    }

    /**
     * Constructor for TeeConsumer.
     *
     * @param stream a {@link java.io.PrintStream} object
     * @param indent a {@link java.lang.String} object
     */
    public TeeConsumer(PrintStream stream, String indent) {
        this.stream = stream;
        this.indent = indent;
    }

    @Override
    public void consumeLine(String line) {
        stream.println(indent + line);

        content.append(line);
        content.append(LS);
    }

    /**
     * Getter for the field content.
     *
     * @return a {@link java.lang.String} object
     */
    public String getContent() {
        return content.toString();
    }

    @Override
    public String toString() {
        return getContent();
    }
}