--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/make/tools/crules/AssertCheckAnalyzer.java	Fri Aug 01 11:09:40 2014 -0700
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package crules;
+
+import com.sun.source.util.JavacTask;
+import com.sun.source.util.TaskEvent.Kind;
+import com.sun.tools.javac.code.Symbol;
+import com.sun.tools.javac.tree.JCTree.JCExpression;
+import com.sun.tools.javac.tree.JCTree.JCMethodInvocation;
+import com.sun.tools.javac.tree.JCTree.Tag;
+import com.sun.tools.javac.tree.TreeInfo;
+import com.sun.tools.javac.tree.TreeScanner;
+import com.sun.tools.javac.util.Assert;
+
+public class AssertCheckAnalyzer extends AbstractCodingRulesAnalyzer {
+
+    public AssertCheckAnalyzer(JavacTask task) {
+        super(task);
+        treeVisitor = new AssertCheckVisitor();
+        eventKind = Kind.ANALYZE;
+    }
+
+    class AssertCheckVisitor extends TreeScanner {
+
+        @Override
+        public void visitApply(JCMethodInvocation tree) {
+            Symbol method = TreeInfo.symbolFor(tree);
+            if (method != null &&
+                method.owner.getQualifiedName().contentEquals(Assert.class.getName()) &&
+                !method.name.contentEquals("error")) {
+                JCExpression lastParam = tree.args.last();
+                if (lastParam != null &&
+                    lastParam.type.tsym == syms.stringType.tsym &&
+                    lastParam.hasTag(Tag.PLUS)) {
+                    messages.error(tree, "crules.should.not.use.string.concatenation");
+                }
+            }
+
+            super.visitApply(tree);
+        }
+
+    }
+}