diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/DemuxOutputStream.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/DemuxOutputStream.java | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/DemuxOutputStream.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/DemuxOutputStream.java deleted file mode 100644 index bd399132..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/DemuxOutputStream.java +++ /dev/null @@ -1,249 +0,0 @@ -/* - * 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.ByteArrayOutputStream; -import java.io.IOException; -import java.io.OutputStream; -import java.util.WeakHashMap; - - -/** - * Logs content written by a thread and forwards the buffers onto the - * project object which will forward the content to the appropriate - * task. - * - * @since 1.4 - */ -public class DemuxOutputStream extends OutputStream { - - /** - * A data class to store information about a buffer. Such information - * is stored on a per-thread basis. - */ - private static class BufferInfo { - /** - * The per-thread output stream. - */ - private ByteArrayOutputStream buffer; - - /** - * Indicates we have just seen a carriage return. It may be part of - * a crlf pair or a single cr invoking processBuffer twice. - */ - private boolean crSeen = false; - } - - /** Maximum buffer size. */ - private static final int MAX_SIZE = 1024; - - /** Initial buffer size. */ - private static final int INITIAL_SIZE = 132; - - /** Carriage return */ - private static final int CR = 0x0d; - - /** Linefeed */ - private static final int LF = 0x0a; - - /** Mapping from thread to buffer (Thread to BufferInfo). */ - private WeakHashMap<Thread, BufferInfo> buffers = new WeakHashMap<Thread, BufferInfo>(); - - /** - * The project to send output to. - */ - private Project project; - - /** - * Whether or not this stream represents an error stream. - */ - private boolean isErrorStream; - - /** - * Creates a new instance of this class. - * - * @param project The project instance for which output is being - * demultiplexed. Must not be <code>null</code>. - * @param isErrorStream <code>true</code> if this is the error string, - * otherwise a normal output stream. This is - * passed to the project so it knows - * which stream it is receiving. - */ - public DemuxOutputStream(Project project, boolean isErrorStream) { - this.project = project; - this.isErrorStream = isErrorStream; - } - - /** - * Returns the buffer associated with the current thread. - * - * @return a BufferInfo for the current thread to write data to - */ - private BufferInfo getBufferInfo() { - Thread current = Thread.currentThread(); - BufferInfo bufferInfo = (BufferInfo) buffers.get(current); - if (bufferInfo == null) { - bufferInfo = new BufferInfo(); - bufferInfo.buffer = new ByteArrayOutputStream(INITIAL_SIZE); - bufferInfo.crSeen = false; - buffers.put(current, bufferInfo); - } - return bufferInfo; - } - - /** - * Resets the buffer for the current thread. - */ - private void resetBufferInfo() { - Thread current = Thread.currentThread(); - BufferInfo bufferInfo = (BufferInfo) buffers.get(current); - try { - bufferInfo.buffer.close(); - } catch (IOException e) { - // Shouldn't happen - } - bufferInfo.buffer = new ByteArrayOutputStream(); - bufferInfo.crSeen = false; - } - - /** - * Removes the buffer for the current thread. - */ - private void removeBuffer() { - Thread current = Thread.currentThread(); - buffers.remove (current); - } - - /** - * Writes the data to the buffer and flushes the buffer if a line - * separator is detected or if the buffer has reached its maximum size. - * - * @param cc data to log (byte). - * @exception IOException if the data cannot be written to the stream - */ - public void write(int cc) throws IOException { - final byte c = (byte) cc; - - BufferInfo bufferInfo = getBufferInfo(); - - if (c == '\n') { - // LF is always end of line (i.e. CRLF or single LF) - bufferInfo.buffer.write(cc); - processBuffer(bufferInfo.buffer); - } else { - if (bufferInfo.crSeen) { - // CR without LF - send buffer then add char - processBuffer(bufferInfo.buffer); - } - // add into buffer - bufferInfo.buffer.write(cc); - } - bufferInfo.crSeen = (c == '\r'); - if (!bufferInfo.crSeen && bufferInfo.buffer.size() > MAX_SIZE) { - processBuffer(bufferInfo.buffer); - } - } - - /** - * Converts the buffer to a string and sends it to the project. - * - * @param buffer the ByteArrayOutputStream used to collect the output - * until a line separator is seen. - * - * @see Project#demuxOutput(String,boolean) - */ - protected void processBuffer(ByteArrayOutputStream buffer) { - String output = buffer.toString(); - project.demuxOutput(output, isErrorStream); - resetBufferInfo(); - } - - /** - * Converts the buffer to a string and sends it to the project. - * - * @param buffer the ByteArrayOutputStream used to collect the output - * until a line separator is seen. - * - * @see Project#demuxOutput(String,boolean) - */ - protected void processFlush(ByteArrayOutputStream buffer) { - String output = buffer.toString(); - project.demuxFlush(output, isErrorStream); - resetBufferInfo(); - } - - /** - * Equivalent to flushing the stream. - * - * @exception IOException if there is a problem closing the stream. - * - * @see #flush - */ - public void close() throws IOException { - flush(); - removeBuffer(); - } - - /** - * Writes all remaining data in the buffer associated - * with the current thread to the project. - * - * @exception IOException if there is a problem flushing the stream. - */ - public void flush() throws IOException { - BufferInfo bufferInfo = getBufferInfo(); - if (bufferInfo.buffer.size() > 0) { - processFlush(bufferInfo.buffer); - } - } - - /** - * Write a block of characters to the output stream - * - * @param b the array containing the data - * @param off the offset into the array where data starts - * @param len the length of block - * - * @throws IOException if the data cannot be written into the stream. - */ - public void write(byte[] b, int off, int len) throws IOException { - // find the line breaks and pass other chars through in blocks - int offset = off; - int blockStartOffset = offset; - int remaining = len; - BufferInfo bufferInfo = getBufferInfo(); - while (remaining > 0) { - while (remaining > 0 && b[offset] != LF && b[offset] != CR) { - offset++; - remaining--; - } - // either end of buffer or a line separator char - int blockLength = offset - blockStartOffset; - if (blockLength > 0) { - bufferInfo.buffer.write(b, blockStartOffset, blockLength); - } - while (remaining > 0 && (b[offset] == LF || b[offset] == CR)) { - write(b[offset]); - offset++; - remaining--; - } - blockStartOffset = offset; - } - } -} |