1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Copyright 2001-2004 The Apache Software Foundation. 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * 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 * $Id: CopyOf.java,v 1.2.4.1 2005/09/01 12:16:22 pvedula Exp $ 22 */ 23 24 package com.sun.org.apache.xalan.internal.xsltc.compiler; 25 26 import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; 27 import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE; 28 import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC; 29 import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; 30 import com.sun.org.apache.bcel.internal.generic.InstructionList; 31 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; 32 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; 33 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; 34 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType; 35 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType; 36 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType; 37 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType; 38 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; 39 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; 40 import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util; 41 42 /** 43 * @author Jacek Ambroziak 44 * @author Santiago Pericas-Geertsen 45 */ 46 final class CopyOf extends Instruction { 47 private Expression _select; 48 display(int indent)49 public void display(int indent) { 50 indent(indent); 51 Util.println("CopyOf"); 52 indent(indent + IndentIncrement); 53 Util.println("select " + _select.toString()); 54 } 55 parseContents(Parser parser)56 public void parseContents(Parser parser) { 57 _select = parser.parseExpression(this, "select", null); 58 // make sure required attribute(s) have been set 59 if (_select.isDummy()) { 60 reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "select"); 61 return; 62 } 63 } 64 typeCheck(SymbolTable stable)65 public Type typeCheck(SymbolTable stable) throws TypeCheckError { 66 final Type tselect = _select.typeCheck(stable); 67 if (tselect instanceof NodeType || 68 tselect instanceof NodeSetType || 69 tselect instanceof ReferenceType || 70 tselect instanceof ResultTreeType) { 71 // falls through 72 } 73 else { 74 _select = new CastExpr(_select, Type.String); 75 } 76 return Type.Void; 77 } 78 translate(ClassGenerator classGen, MethodGenerator methodGen)79 public void translate(ClassGenerator classGen, MethodGenerator methodGen) { 80 final ConstantPoolGen cpg = classGen.getConstantPool(); 81 final InstructionList il = methodGen.getInstructionList(); 82 final Type tselect = _select.getType(); 83 84 final String CPY1_SIG = "("+NODE_ITERATOR_SIG+TRANSLET_OUTPUT_SIG+")V"; 85 final int cpy1 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY1_SIG); 86 87 final String CPY2_SIG = "("+NODE_SIG+TRANSLET_OUTPUT_SIG+")V"; 88 final int cpy2 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY2_SIG); 89 90 final String getDoc_SIG = "()"+NODE_SIG; 91 final int getDoc = cpg.addInterfaceMethodref(DOM_INTF, "getDocument", getDoc_SIG); 92 93 94 if (tselect instanceof NodeSetType) { 95 il.append(methodGen.loadDOM()); 96 97 // push NodeIterator 98 _select.translate(classGen, methodGen); 99 _select.startIterator(classGen, methodGen); 100 101 // call copy from the DOM 'library' 102 il.append(methodGen.loadHandler()); 103 il.append(new INVOKEINTERFACE(cpy1, 3)); 104 } 105 else if (tselect instanceof NodeType) { 106 il.append(methodGen.loadDOM()); 107 _select.translate(classGen, methodGen); 108 il.append(methodGen.loadHandler()); 109 il.append(new INVOKEINTERFACE(cpy2, 3)); 110 } 111 else if (tselect instanceof ResultTreeType) { 112 _select.translate(classGen, methodGen); 113 // We want the whole tree, so we start with the root node 114 il.append(DUP); //need a pointer to the DOM ; 115 il.append(new INVOKEINTERFACE(getDoc,1)); //ICONST_0); 116 il.append(methodGen.loadHandler()); 117 il.append(new INVOKEINTERFACE(cpy2, 3)); 118 } 119 else if (tselect instanceof ReferenceType) { 120 _select.translate(classGen, methodGen); 121 il.append(methodGen.loadHandler()); 122 il.append(methodGen.loadCurrentNode()); 123 il.append(methodGen.loadDOM()); 124 final int copy = cpg.addMethodref(BASIS_LIBRARY_CLASS, "copy", 125 "(" 126 + OBJECT_SIG 127 + TRANSLET_OUTPUT_SIG 128 + NODE_SIG 129 + DOM_INTF_SIG 130 + ")V"); 131 il.append(new INVOKESTATIC(copy)); 132 } 133 else { 134 il.append(classGen.loadTranslet()); 135 _select.translate(classGen, methodGen); 136 il.append(methodGen.loadHandler()); 137 il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS, 138 CHARACTERSW, 139 CHARACTERSW_SIG))); 140 } 141 142 } 143 } 144