1 files changed, 148 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/IndentingPrintWriter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/IndentingPrintWriter.java
new file mode 100644
index 0000000000..c510c86ebb
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/IndentingPrintWriter.java
@@ -0,0 +1,148 @@
+/*******************************************************************************
+ * Copyright (c) 2005, 2007 Oracle. 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:
+ *     Oracle - initial API and implementation
+ ******************************************************************************/
+package org.eclipse.jpt.utility.internal;
+
+import java.io.PrintWriter;
+import java.io.Writer;
+
+/**
+ * Extend PrintWriter to automatically indent new lines.
+ */
+public class IndentingPrintWriter extends PrintWriter {
+
+	private final String indent;
+	private int indentLevel;
+	private boolean needsIndent;
+
+	public static String DEFAULT_INDENT = "\t";
+
+
+	/**
+	 * Construct a writer that indents with tabs.
+	 */
+	public IndentingPrintWriter(Writer out) {
+		this(out, DEFAULT_INDENT);
+	}
+	
+	/**
+	 * Construct a writer that indents with the specified string.
+	 */
+	public IndentingPrintWriter(Writer out, String indent) {
+		super(out);
+		this.indent = indent;
+		this.indentLevel = 0;
+		this.needsIndent = true;
+	}
+	
+	/**
+	 * Set flag so following line is indented.
+	 */
+	@Override
+	public void println() {
+		synchronized (this.lock) {
+			super.println();
+			this.needsIndent = true;
+		}
+	}
+	
+	/**
+	 * Print the appropriate indent.
+	 */
+	private void printIndent() {
+		if (this.needsIndent) {
+			this.needsIndent = false;
+			for (int i = this.indentLevel; i-- > 0; ) {
+				this.print(this.indent);
+			}
+		}
+	}
+	
+	/**
+	 * Write a portion of an array of characters.
+	 */
+	@Override
+	public void write(char buf[], int off, int len) {
+		synchronized (this.lock) {
+			this.printIndent();
+			super.write(buf, off, len);
+		}
+	}
+	
+	/**
+	 * Write a single character.
+	 */
+	@Override
+	public void write(int c) {
+		synchronized (this.lock) {
+			this.printIndent();
+			super.write(c);
+		}
+	}
+	
+	/**
+	 * Write a portion of a string.
+	 */
+	@Override
+	public void write(String s, int off, int len) {
+		synchronized (this.lock) {
+			this.printIndent();
+			super.write(s, off, len);
+		}
+	}
+	
+	/**
+	 * Bump the indent level.
+	 */
+	public void indent() {
+		this.incrementIndentLevel();
+	}
+	
+	/**
+	 * Decrement the indent level.
+	 */
+	public void undent() {
+		this.decrementIndentLevel();
+	}
+	
+	/**
+	 * Bump the indent level.
+	 */
+	public void incrementIndentLevel() {
+		synchronized (this.lock) {
+			this.indentLevel++;
+		}
+	}
+	
+	/**
+	 * Decrement the indent level.
+	 */
+	public void decrementIndentLevel() {
+		synchronized (this.lock) {
+			this.indentLevel--;
+		}
+	}
+	
+	/**
+	 * Return the current indent level.
+	 */
+	public int getIndentLevel() {
+		return this.indentLevel;
+	}
+	
+	/**
+	 * Allow the indent level to be set directly.
+	 */
+	public void setIndentLevel(int indentLevel) {
+		synchronized (this.lock) {
+			this.indentLevel = indentLevel;
+		}
+	}
+
+}