org.apache.maven.plugin.surefire.report.Utf8RecodingDeferredFileOutputStream.java Source code

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Here is the source code for org.apache.maven.plugin.surefire.report.Utf8RecodingDeferredFileOutputStream.java

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package org.apache.maven.plugin.surefire.report;

/*
 * 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.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;

import org.apache.commons.io.output.DeferredFileOutputStream;

/**
 * A deferred file output stream decorator that recodes the bytes written into the stream from the VM default encoding
 * to UTF-8.
 *
 * @author Andreas Gudian
 */
class Utf8RecodingDeferredFileOutputStream {
    private DeferredFileOutputStream deferredFileOutputStream;

    private boolean closed = false;

    private static final Charset UTF8 = Charset.forName("UTF-8");

    @SuppressWarnings("checkstyle:magicnumber")
    public Utf8RecodingDeferredFileOutputStream(String channel) {
        this.deferredFileOutputStream = new DeferredFileOutputStream(1000000, channel, "deferred", null);
    }

    public synchronized void write(byte[] buf, int off, int len) throws IOException {
        if (closed) {
            return;
        }

        if (!Charset.defaultCharset().equals(UTF8)) {
            CharBuffer decodedFromDefaultCharset = Charset.defaultCharset().decode(ByteBuffer.wrap(buf, off, len));
            ByteBuffer utf8Encoded = UTF8.encode(decodedFromDefaultCharset);

            if (utf8Encoded.hasArray()) {
                byte[] convertedBytes = utf8Encoded.array();

                deferredFileOutputStream.write(convertedBytes, utf8Encoded.position(), utf8Encoded.remaining());
            } else {
                byte[] convertedBytes = new byte[utf8Encoded.remaining()];
                utf8Encoded.get(convertedBytes, 0, utf8Encoded.remaining());

                deferredFileOutputStream.write(convertedBytes, 0, convertedBytes.length);
            }
        } else {
            deferredFileOutputStream.write(buf, off, len);
        }
    }

    public long getByteCount() {
        return deferredFileOutputStream.getByteCount();
    }

    public synchronized void close() throws IOException {
        closed = true;
        deferredFileOutputStream.close();
    }

    public synchronized void writeTo(OutputStream out) throws IOException {
        if (closed) {
            deferredFileOutputStream.writeTo(out);
        }
    }

    public synchronized void free() {
        if (null != deferredFileOutputStream && null != deferredFileOutputStream.getFile()) {
            try {
                closed = true;
                deferredFileOutputStream.close();
                if (!deferredFileOutputStream.getFile().delete()) {
                    deferredFileOutputStream.getFile().deleteOnExit();
                }
            } catch (IOException ioe) {
                deferredFileOutputStream.getFile().deleteOnExit();

            }
        }
    }
}