/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with 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 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 468650 2006-10-28 07:03:30Z minchau $
*/
package org.apache.xalan.xsltc.compiler;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.INVOKEINTERFACE;
import org.apache.bcel.generic.INVOKESTATIC;
import org.apache.bcel.generic.INVOKEVIRTUAL;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.NodeSetType;
import org.apache.xalan.xsltc.compiler.util.NodeType;
import org.apache.xalan.xsltc.compiler.util.ReferenceType;
import org.apache.xalan.xsltc.compiler.util.ResultTreeType;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
import org.apache.xalan.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)));
}
}
}