/*
* @(#)$Id: CopyOf.java,v 1.12 2003/01/30 18:45:59 mkwan Exp $
*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Sun
* Microsystems., http://www.sun.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
*
*/
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;
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);
if (tselect instanceof NodeSetType) {
il.append(methodGen.loadDOM());
// push NodeIterator
_select.translate(classGen, methodGen);
_select.startResetIterator(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(ICONST_1);
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)));
}
}
}