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changeset 16335:524f5cf6cb95

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Truffle/Source: add a singleton null instance of SourceCallback
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Mon, 30 Jun 2014 19:34:05 -0700
parents 0e36e8377c99
children c88a9e432faf 0ffff2c5e44e
files graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/SourceCallback.java
diffstat 1 files changed, 13 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/SourceCallback.java	Mon Jun 30 21:22:39 2014 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/SourceCallback.java	Mon Jun 30 19:34:05 2014 -0700
@@ -34,4 +34,17 @@
     public void startLoading(Source source);
 
     public void endLoading(Source source);
+
+    /**
+     * Inert (singleton) implementation of {@link SourceCallback}.
+     */
+    SourceCallback NULL = new SourceCallback() {
+
+        public void startLoading(Source source) {
+        }
+
+        public void endLoading(Source source) {
+        }
+
+    };
 }