diff -r 1d7e6da6adc8 -r c348e06f0e82 jaxp/src/com/sun/org/apache/xalan/internal/xsltc/compiler/ConcatCall.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/com/sun/org/apache/xalan/internal/xsltc/compiler/ConcatCall.java	Thu Apr 12 08:38:26 2012 -0700
@@ -0,0 +1,97 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright 2001-2004 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * $Id: ConcatCall.java,v 1.2.4.1 2005/09/01 12:07:31 pvedula Exp $
+ */
+
+package com.sun.org.apache.xalan.internal.xsltc.compiler;
+
+import java.util.Vector;
+
+import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
+import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
+import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
+import com.sun.org.apache.bcel.internal.generic.Instruction;
+import com.sun.org.apache.bcel.internal.generic.InstructionList;
+import com.sun.org.apache.bcel.internal.generic.NEW;
+import com.sun.org.apache.bcel.internal.generic.PUSH;
+import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
+import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
+import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
+import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
+
+/**
+ * @author Jacek Ambroziak
+ * @author Santiago Pericas-Geertsen
+ */
+final class ConcatCall extends FunctionCall {
+    public ConcatCall(QName fname, Vector arguments) {
+        super(fname, arguments);
+    }
+
+    public Type typeCheck(SymbolTable stable) throws TypeCheckError {
+        for (int i = 0; i < argumentCount(); i++) {
+            final Expression exp = argument(i);
+            if (!exp.typeCheck(stable).identicalTo(Type.String)) {
+                setArgument(i, new CastExpr(exp, Type.String));
+            }
+        }
+        return _type = Type.String;
+    }
+
+    /** translate leaves a String on the stack */
+    public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
+        final ConstantPoolGen cpg = classGen.getConstantPool();
+        final InstructionList il = methodGen.getInstructionList();
+        final int nArgs = argumentCount();
+
+        switch (nArgs) {
+        case 0:
+            il.append(new PUSH(cpg, EMPTYSTRING));
+            break;
+
+        case 1:
+            argument().translate(classGen, methodGen);
+            break;
+
+        default:
+            final int initBuffer = cpg.addMethodref(STRING_BUFFER_CLASS,
+                                                    "<init>", "()V");
+            final Instruction append =
+                new INVOKEVIRTUAL(cpg.addMethodref(STRING_BUFFER_CLASS,
+                                                   "append",
+                                                   "("+STRING_SIG+")"
+                                                   +STRING_BUFFER_SIG));
+
+            final int toString = cpg.addMethodref(STRING_BUFFER_CLASS,
+                                                  "toString",
+                                                  "()"+STRING_SIG);
+
+            il.append(new NEW(cpg.addClass(STRING_BUFFER_CLASS)));
+            il.append(DUP);
+            il.append(new INVOKESPECIAL(initBuffer));
+            for (int i = 0; i < nArgs; i++) {
+                argument(i).translate(classGen, methodGen);
+                il.append(append);
+            }
+            il.append(new INVOKEVIRTUAL(toString));
+        }
+    }
+}