- /*
- * Copyright 2001-2004 The Apache Software Foundation.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- /*
- * $Id: CopyOf.java,v 1.15 2004/02/16 22:24:29 minchau Exp $
- */
-
- 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
- * @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)));
- }
-
- }
- }