312839: smaller class files

1 files changed, 101 insertions, 0 deletions

diff --git a/org.aspectj.matcher/src/org/aspectj/weaver/CompressingDataOutputStream.java b/org.aspectj.matcher/src/org/aspectj/weaver/CompressingDataOutputStream.java
new file mode 100644
index 000000000..1e2f31c35
--- /dev/null
+++ b/org.aspectj.matcher/src/org/aspectj/weaver/CompressingDataOutputStream.java
@@ -0,0 +1,101 @@
+/* *******************************************************************
+ * Copyright (c) 2010 Contributors
+ * All rights reserved. 
+ * This program and the accompanying materials are made available 
+ * under the terms of the Eclipse Public License v1.0 
+ * which accompanies this distribution and is available at 
+ * http://www.eclipse.org/legal/epl-v10.html 
+ * 
+ * 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 CompressingDataOutputStream(ByteArrayOutputStream baos, ConstantPoolWriter constantPoolWriter) {
+		super(baos);
+		this.constantPoolWriter = constantPoolWriter;
+	}
+
+	public CompressingDataOutputStream(ByteArrayOutputStream baos) {
+		super(baos);
+	}
+
+	public CompressingDataOutputStream(FileOutputStream fos) {
+		super(fos);
+	}
+
+	public boolean canCompress() {
+		return constantPoolWriter != null;
+	}
+
+	/**
+	 * @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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