1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * @LastModified: Oct 2017
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.xalan.internal.xsltc.compiler;
  23 
  24 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  25 import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
  26 import com.sun.org.apache.bcel.internal.generic.InstructionList;
  27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  29 import java.util.List;
  30 
  31 /**
  32  * @author Morten Jorgensen

  33  */
  34 final class NamespaceUriCall extends NameBase {
  35 
  36     /**
  37      * Handles calls with no parameter (current node is implicit parameter).
  38      */
  39     public NamespaceUriCall(QName fname) {
  40         super(fname);
  41     }
  42 
  43     /**
  44      * Handles calls with one parameter (either node or node-set).
  45      */
  46     public NamespaceUriCall(QName fname, List<Expression> arguments) {
  47         super(fname, arguments);
  48     }
  49 
  50     /**
  51      * Translate code that leaves a node's namespace URI (as a String)
  52      * on the stack
  53      */
  54     public void translate(ClassGenerator classGen,
  55                           MethodGenerator methodGen) {
  56         final ConstantPoolGen cpg = classGen.getConstantPool();
  57         final InstructionList il = methodGen.getInstructionList();
  58 
  59         // Returns the string value for a node in the DOM
  60         final int getNamespace = cpg.addInterfaceMethodref(DOM_INTF,
  61                                                            "getNamespaceName",
  62                                                            "(I)"+STRING_SIG);
  63         super.translate(classGen, methodGen);
  64         il.append(new INVOKEINTERFACE(getNamespace, 2));
  65     }
  66 }
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