1 files changed, 50 insertions, 0 deletions
diff --git a/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/backend/expr/RegisterAdviceExpression.java b/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/backend/expr/RegisterAdviceExpression.java
new file mode 100644
index 00000000..d2eece1f
--- /dev/null
+++ b/plugins/org.eclipse.xtend.backend/src/org/eclipse/xtend/backend/expr/RegisterAdviceExpression.java
@@ -0,0 +1,50 @@
+/*
+Copyright (c) 2008 Arno Haase.
+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:
+    Arno Haase - initial API and implementation
+ */
+package org.eclipse.xtend.backend.expr;
+
+import org.eclipse.xtend.backend.aop.AroundAdvice;
+import org.eclipse.xtend.backend.common.AdviceContext;
+import org.eclipse.xtend.backend.common.ExecutionContext;
+import org.eclipse.xtend.backend.common.ExpressionBase;
+import org.eclipse.xtend.backend.common.SourcePos;
+
+
+//TODO test this
+
+/**
+ * This class dynamically registers advice for the scope of the execution of a contained expression.
+ * 
+ * @author Arno Haase (http://www.haase-consulting.com)
+ */
+public final class RegisterAdviceExpression extends ExpressionBase {
+    private final AroundAdvice _advice;
+    private final ExpressionBase _inner;
+
+    public RegisterAdviceExpression (ExpressionBase inner, AroundAdvice advice, SourcePos sourcePos) {
+        super(sourcePos);
+        
+        _advice = advice;
+        _inner = inner;
+    }
+
+    @Override
+    protected Object evaluateInternal (ExecutionContext ctx) {
+        final AdviceContext oldContext = ctx.getAdviceContext();
+        
+        ctx.setAdviceContext (ctx.getAdviceContext ().copyWithAdvice (_advice));
+        try {
+            return _inner.evaluate (ctx);
+        }
+        finally {
+            ctx.setAdviceContext (oldContext);
+        }
+    }
+}