1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.xalan.internal.xsltc.compiler; 22 23 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; 24 import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC; 25 import com.sun.org.apache.bcel.internal.generic.InstructionList; 26 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; 27 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; 28 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; 29 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; 30 import java.util.List; 31 32 /** 33 * @author Morten Jorgensen 34 * @author Erwin Bolwidt <ejb@klomp.org> 35 * @LastModified: Oct 2017 36 */ 37 class NameBase extends FunctionCall { 38 39 private Expression _param = null; 40 private Type _paramType = Type.Node; 41 42 /** 43 * Handles calls with no parameter (current node is implicit parameter). 44 */ NameBase(QName fname)45 public NameBase(QName fname) { 46 super(fname); 47 } 48 49 /** 50 * Handles calls with one parameter (either node or node-set). 51 */ NameBase(QName fname, List<Expression> arguments)52 public NameBase(QName fname, List<Expression> arguments) { 53 super(fname, arguments); 54 _param = argument(0); 55 } 56 57 58 /** 59 * Check that we either have no parameters or one parameter that is 60 * either a node or a node-set. 61 */ typeCheck(SymbolTable stable)62 public Type typeCheck(SymbolTable stable) throws TypeCheckError { 63 64 // Check the argument type (if any) 65 switch(argumentCount()) { 66 case 0: 67 _paramType = Type.Node; 68 break; 69 case 1: 70 _paramType = _param.typeCheck(stable); 71 break; 72 default: 73 throw new TypeCheckError(this); 74 } 75 76 // The argument has to be a node, a node-set or a node reference 77 if ((_paramType != Type.NodeSet) && 78 (_paramType != Type.Node) && 79 (_paramType != Type.Reference)) { 80 throw new TypeCheckError(this); 81 } 82 83 return (_type = Type.String); 84 } 85 getType()86 public Type getType() { 87 return _type; 88 } 89 90 /** 91 * Translate the code required for getting the node for which the 92 * QName, local-name or namespace URI should be extracted. 93 */ translate(ClassGenerator classGen, MethodGenerator methodGen)94 public void translate(ClassGenerator classGen, 95 MethodGenerator methodGen) { 96 final ConstantPoolGen cpg = classGen.getConstantPool(); 97 final InstructionList il = methodGen.getInstructionList(); 98 99 il.append(methodGen.loadDOM()); 100 101 // Function was called with no parameters 102 if (argumentCount() == 0) { 103 il.append(methodGen.loadContextNode()); 104 } 105 // Function was called with node parameter 106 else if (_paramType == Type.Node) { 107 _param.translate(classGen, methodGen); 108 } 109 else if (_paramType == Type.Reference) { 110 _param.translate(classGen, methodGen); 111 il.append(new INVOKESTATIC(cpg.addMethodref 112 (BASIS_LIBRARY_CLASS, 113 "referenceToNodeSet", 114 "(" 115 + OBJECT_SIG 116 + ")" 117 + NODE_ITERATOR_SIG))); 118 il.append(methodGen.nextNode()); 119 } 120 // Function was called with node-set parameter 121 else { 122 _param.translate(classGen, methodGen); 123 _param.startIterator(classGen, methodGen); 124 il.append(methodGen.nextNode()); 125 } 126 } 127 } 128