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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
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package com.sun.org.apache.xalan.internal.xsltc.compiler;

import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
import com.sun.org.apache.bcel.internal.generic.INVOKESTATIC;
import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ResultTreeType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;

Author:Jacek Ambroziak, Santiago Pericas-Geertsen
/** * @author Jacek Ambroziak * @author Santiago Pericas-Geertsen */
final class CopyOf extends Instruction { private Expression _select; public void display(int indent) { indent(indent); Util.println("CopyOf"); indent(indent + IndentIncrement); Util.println("select " + _select.toString()); } public void parseContents(Parser parser) { _select = parser.parseExpression(this, "select", null); // make sure required attribute(s) have been set if (_select.isDummy()) { reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR, "select"); return; } } public Type typeCheck(SymbolTable stable) throws TypeCheckError { final Type tselect = _select.typeCheck(stable); if (tselect instanceof NodeType || tselect instanceof NodeSetType || tselect instanceof ReferenceType || tselect instanceof ResultTreeType) { // falls through } else { _select = new CastExpr(_select, Type.String); } return Type.Void; } public void translate(ClassGenerator classGen, MethodGenerator methodGen) { final ConstantPoolGen cpg = classGen.getConstantPool(); final InstructionList il = methodGen.getInstructionList(); final Type tselect = _select.getType(); final String CPY1_SIG = "("+NODE_ITERATOR_SIG+TRANSLET_OUTPUT_SIG+")V"; final int cpy1 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY1_SIG); final String CPY2_SIG = "("+NODE_SIG+TRANSLET_OUTPUT_SIG+")V"; final int cpy2 = cpg.addInterfaceMethodref(DOM_INTF, "copy", CPY2_SIG); final String getDoc_SIG = "()"+NODE_SIG; final int getDoc = cpg.addInterfaceMethodref(DOM_INTF, "getDocument", getDoc_SIG); if (tselect instanceof NodeSetType) { il.append(methodGen.loadDOM()); // push NodeIterator _select.translate(classGen, methodGen); _select.startIterator(classGen, methodGen); // call copy from the DOM 'library' il.append(methodGen.loadHandler()); il.append(new INVOKEINTERFACE(cpy1, 3)); } else if (tselect instanceof NodeType) { il.append(methodGen.loadDOM()); _select.translate(classGen, methodGen); il.append(methodGen.loadHandler()); il.append(new INVOKEINTERFACE(cpy2, 3)); } else if (tselect instanceof ResultTreeType) { _select.translate(classGen, methodGen); // We want the whole tree, so we start with the root node il.append(DUP); //need a pointer to the DOM ; il.append(new INVOKEINTERFACE(getDoc,1)); //ICONST_0); il.append(methodGen.loadHandler()); il.append(new INVOKEINTERFACE(cpy2, 3)); } else if (tselect instanceof ReferenceType) { _select.translate(classGen, methodGen); il.append(methodGen.loadHandler()); il.append(methodGen.loadCurrentNode()); il.append(methodGen.loadDOM()); final int copy = cpg.addMethodref(BASIS_LIBRARY_CLASS, "copy", "(" + OBJECT_SIG + TRANSLET_OUTPUT_SIG + NODE_SIG + DOM_INTF_SIG + ")V"); il.append(new INVOKESTATIC(copy)); } else { il.append(classGen.loadTranslet()); _select.translate(classGen, methodGen); il.append(methodGen.loadHandler()); il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS, CHARACTERSW, CHARACTERSW_SIG))); } } }