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/*
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* reserved comment block
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* DO NOT REMOVE OR ALTER!
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*/
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/*
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* Copyright 2001-2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: CopyOf.java,v 1.2.4.1 2005/09/01 12:16:22 pvedula Exp $
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*/
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package com.sun.org.apache.xalan.internal.xsltc.compiler;
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import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
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import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
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import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
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import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
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import com.sun.org.apache.bcel.internal.generic.InstructionList;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
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import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
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/**
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* @author Jacek Ambroziak
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* @author Santiago Pericas-Geertsen
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*/
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final class CopyOf extends Instruction {
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private Expression _select;
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public void display(int indent) {
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indent(indent);
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Util.println("CopyOf");
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indent(indent + IndentIncrement);
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Util.println("select " + _select.toString());
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}
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public void parseContents(Parser parser) {
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_select = parser.parseExpression(this, "select", null);
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// make sure required attribute(s) have been set
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if (_select.isDummy()) {
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reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "select");
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return;
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}
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}
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public Type typeCheck(SymbolTable stable) throws TypeCheckError {
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final Type tselect = _select.typeCheck(stable);
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if (tselect instanceof NodeType ||
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tselect instanceof NodeSetType ||
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tselect instanceof ReferenceType ||
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tselect instanceof ResultTreeType) {
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// falls through
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}
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else {
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_select = new CastExpr(_select, Type.String);
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}
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return Type.Void;
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}
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public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
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final ConstantPoolGen cpg = classGen.getConstantPool();
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final InstructionList il = methodGen.getInstructionList();
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final Type tselect = _select.getType();
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final String CPY1_SIG = "("+NODE_ITERATOR_SIG+TRANSLET_OUTPUT_SIG+")V";
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final int cpy1 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY1_SIG);
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final String CPY2_SIG = "("+NODE_SIG+TRANSLET_OUTPUT_SIG+")V";
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final int cpy2 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY2_SIG);
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final String getDoc_SIG = "()"+NODE_SIG;
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final int getDoc = cpg.addInterfaceMethodref(DOM_INTF, "getDocument", getDoc_SIG);
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if (tselect instanceof NodeSetType) {
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il.append(methodGen.loadDOM());
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// push NodeIterator
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_select.translate(classGen, methodGen);
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_select.startIterator(classGen, methodGen);
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// call copy from the DOM 'library'
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il.append(methodGen.loadHandler());
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il.append(new INVOKEINTERFACE(cpy1, 3));
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}
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else if (tselect instanceof NodeType) {
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il.append(methodGen.loadDOM());
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_select.translate(classGen, methodGen);
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il.append(methodGen.loadHandler());
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il.append(new INVOKEINTERFACE(cpy2, 3));
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}
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else if (tselect instanceof ResultTreeType) {
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_select.translate(classGen, methodGen);
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// We want the whole tree, so we start with the root node
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il.append(DUP); //need a pointer to the DOM ;
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il.append(new INVOKEINTERFACE(getDoc,1)); //ICONST_0);
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il.append(methodGen.loadHandler());
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il.append(new INVOKEINTERFACE(cpy2, 3));
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}
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else if (tselect instanceof ReferenceType) {
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_select.translate(classGen, methodGen);
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il.append(methodGen.loadHandler());
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il.append(methodGen.loadCurrentNode());
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il.append(methodGen.loadDOM());
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final int copy = cpg.addMethodref(BASIS_LIBRARY_CLASS, "copy",
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"("
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+ OBJECT_SIG
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+ TRANSLET_OUTPUT_SIG
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+ NODE_SIG
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+ DOM_INTF_SIG
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+ ")V");
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il.append(new INVOKESTATIC(copy));
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}
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else {
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il.append(classGen.loadTranslet());
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_select.translate(classGen, methodGen);
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il.append(methodGen.loadHandler());
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il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS,
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CHARACTERSW,
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CHARACTERSW_SIG)));
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}
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}
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}
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