From e54c3f36e3122dfe34a119178cfcca2dcdbad998 Mon Sep 17 00:00:00 2001
From: Roel Spilker <r.spilker@gmail.com>
Date: Fri, 27 Nov 2009 03:10:03 +0100
Subject: Added change tracking so that 1 AST instance can tell you if any
 processor changed anything.

---
 src/core/lombok/core/AST.java           | 13 +++++++++++++
 src/core/lombok/core/LombokNode.java    |  6 ++++++
 src/core/lombok/eclipse/EclipseAST.java |  3 +++
 src/core/lombok/javac/JavacAST.java     |  1 +
 4 files changed, 23 insertions(+)

diff --git a/src/core/lombok/core/AST.java b/src/core/lombok/core/AST.java
index 6d786d1e..e769ce34 100644
--- a/src/core/lombok/core/AST.java
+++ b/src/core/lombok/core/AST.java
@@ -54,11 +54,24 @@ public abstract class AST<A extends AST<A, L, N>, L extends LombokNode<A, L, N>,
 	private final String fileName;
 	Map<N, Void> identityDetector = new IdentityHashMap<N, Void>();
 	private Map<N, L> nodeMap = new IdentityHashMap<N, L>();
+	private boolean changed = false;
 	
 	protected AST(String fileName) {
 		this.fileName = fileName == null ? "(unknown).java" : fileName;
 	}
 	
+	protected void setChanged() {
+		this.changed = true;
+	}
+	
+	protected void clearChanged() {
+		this.changed = false;
+	}
+	
+	public boolean isChanged() {
+		return changed;
+	}
+	
 	/** Set the node object that wraps the internal Compilation Unit node. */
 	protected void setTop(L top) {
 		this.top = top;
diff --git a/src/core/lombok/core/LombokNode.java b/src/core/lombok/core/LombokNode.java
index c8ee4c00..95c5a0cb 100644
--- a/src/core/lombok/core/LombokNode.java
+++ b/src/core/lombok/core/LombokNode.java
@@ -126,6 +126,7 @@ public abstract class LombokNode<A extends AST<A, L, N>, L extends LombokNode<A,
 	 */
 	@SuppressWarnings("unchecked")
 	public L replaceWith(N newN, Kind newNodeKind) {
+		ast.setChanged();
 		L newNode = ast.buildTree(newN, newNodeKind);
 		newNode.parent = parent;
 		for (int i = 0; i < parent.children.size(); i++) {
@@ -142,6 +143,7 @@ public abstract class LombokNode<A extends AST<A, L, N>, L extends LombokNode<A,
 	 * Also affects the underlying (Eclipse/javac) AST.
 	 */
 	public void replaceChildNode(N oldN, N newN) {
+		ast.setChanged();
 		ast.replaceStatementInNode(get(), oldN, newN);
 	}
 	
@@ -228,6 +230,7 @@ public abstract class LombokNode<A extends AST<A, L, N>, L extends LombokNode<A,
 	 */
 	@SuppressWarnings("unchecked")
 	public L add(N newChild, Kind newChildKind) {
+		ast.setChanged();
 		L n = ast.buildTree(newChild, newChildKind);
 		if (n == null) return null;
 		n.parent = (L) this;
@@ -247,6 +250,8 @@ public abstract class LombokNode<A extends AST<A, L, N>, L extends LombokNode<A,
 		
 		L newNode = ast.buildTree(get(), kind);
 		
+		ast.setChanged();
+		
 		ast.replaceNewWithExistingOld(oldNodes, newNode);
 	}
 	
@@ -265,6 +270,7 @@ public abstract class LombokNode<A extends AST<A, L, N>, L extends LombokNode<A,
 	 * Does not change the underlying (javac/Eclipse) AST, only the wrapped view.
 	 */
 	public void removeChild(L child) {
+		ast.setChanged();
 		children.remove(child);
 	}
 	
diff --git a/src/core/lombok/eclipse/EclipseAST.java b/src/core/lombok/eclipse/EclipseAST.java
index e42e5de2..7f436ddf 100644
--- a/src/core/lombok/eclipse/EclipseAST.java
+++ b/src/core/lombok/eclipse/EclipseAST.java
@@ -60,6 +60,7 @@ public class EclipseAST extends AST<EclipseAST, EclipseNode, ASTNode> {
 		this.compilationUnitDeclaration = ast;
 		setTop(buildCompilationUnit(ast));
 		this.completeParse = isComplete(ast);
+		clearChanged();
 	}
 	
 	/** {@inheritDoc} */
@@ -201,12 +202,14 @@ public class EclipseAST extends AST<EclipseAST, EclipseNode, ASTNode> {
 	public void reparse() {
 		propagateProblems();
 		if (completeParse) return;
+		boolean changed = isChanged();
 		boolean newCompleteParse = isComplete(compilationUnitDeclaration);
 		if (!newCompleteParse) return;
 		
 		top().rebuild();
 		
 		this.completeParse = true;
+		if (!changed) clearChanged();
 	}
 	
 	private static boolean isComplete(CompilationUnitDeclaration unit) {
diff --git a/src/core/lombok/javac/JavacAST.java b/src/core/lombok/javac/JavacAST.java
index 77c63cfe..93e3f3dc 100644
--- a/src/core/lombok/javac/JavacAST.java
+++ b/src/core/lombok/javac/JavacAST.java
@@ -78,6 +78,7 @@ public class JavacAST extends AST<JavacAST, JavacNode, JCTree> {
 		this.nameTable = Name.Table.instance(context);
 		this.treeMaker = TreeMaker.instance(context);
 		this.symtab = Symtab.instance(context);
+		clearChanged();
 	}
 	
 	public Context getContext() {
-- 
cgit