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- /* *******************************************************************
- * Copyright (c) 2010 Contributors
- * All rights reserved.
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Public License v 2.0
- * which accompanies this distribution and is available at
- * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
- *
- * Contributors:
- * Andy Clement (SpringSource)
- * ******************************************************************/
- package org.aspectj.weaver;
-
- import java.io.ByteArrayOutputStream;
- import java.io.DataOutputStream;
- import java.io.FileOutputStream;
- import java.io.IOException;
-
- /**
- * A variation of a DataOutputStream that is linked to a constant pool writer. The linked constant pool can be used to compress
- * objects into to simple index references into the constant pool. The corresponding decompression is done in the
- * VersionedDataInputStream.
- *
- * @author Andy Clement
- */
- public class CompressingDataOutputStream extends DataOutputStream {
-
- private ConstantPoolWriter constantPoolWriter;
- public boolean compressionEnabled = true;
-
- public CompressingDataOutputStream(ByteArrayOutputStream baos, ConstantPoolWriter constantPoolWriter) {
- super(baos);
- this.constantPoolWriter = constantPoolWriter;
- }
-
- public CompressingDataOutputStream(FileOutputStream fos) {
- super(fos);
- }
-
- public boolean canCompress() {
- return constantPoolWriter != null && compressionEnabled;
- }
-
- /**
- * @param signature of the form 'La/b/c/d;'
- * @return the constant pool index
- */
- public int compressSignature(String signature) {
- if (constantPoolWriter == null) {
- throw new IllegalStateException();
- }
- return constantPoolWriter.writeUtf8(signature);
- }
-
- /**
- * @param filepath a file system path 'c:\a\b\c.txt' or '/a/b/c.txt'
- * @return the constant pool index
- */
- public int compressFilepath(String filepath) {
- if (constantPoolWriter == null) {
- throw new IllegalStateException();
- }
- return constantPoolWriter.writeUtf8(filepath);
- }
-
- /**
- * @param name a simple name (for example a method or field name)
- * @return the constant pool index
- */
- public int compressName(String name) {
- if (constantPoolWriter == null) {
- throw new IllegalStateException();
- }
- return constantPoolWriter.writeUtf8(name);
- }
-
- /**
- * @param name a simple name (for example a method or field name)
- */
- public void writeCompressedName(String name) throws IOException {
- writeShort(compressName(name));
- }
-
- /**
- * @param signature of the form 'La/b/c/d;'
- */
- public void writeCompressedSignature(String signature) throws IOException {
- writeShort(compressSignature(signature));
- }
-
- /**
- * @param path a file system path 'c:\a\b\c.txt' or '/a/b/c.txt'
- */
- public void writeCompressedPath(String path) throws IOException {
- writeShort(compressFilepath(path));
- }
-
- }
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