/*
* @(#)$Id: NameBase.java,v 1.9 2003/01/30 18:46:01 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 Morten Jorgensen
* @author Erwin Bolwidt <ejb@klomp.org>
*
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.INVOKESTATIC;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
class NameBase extends FunctionCall {
private Expression _param = null;
private Type _paramType = Type.Node;
/**
* Handles calls with no parameter (current node is implicit parameter).
*/
public NameBase(QName fname) {
super(fname);
}
/**
* Handles calls with one parameter (either node or node-set).
*/
public NameBase(QName fname, Vector arguments) {
super(fname, arguments);
_param = argument(0);
}
/**
* Check that we either have no parameters or one parameter that is
* either a node or a node-set.
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
// Check the argument type (if any)
switch(argumentCount()) {
case 0:
_paramType = Type.Node;
break;
case 1:
_paramType = _param.typeCheck(stable);
break;
default:
throw new TypeCheckError(this);
}
// The argument has to be a node, a node-set or a node reference
if ((_paramType != Type.NodeSet) &&
(_paramType != Type.Node) &&
(_paramType != Type.Reference)) {
throw new TypeCheckError(this);
}
return (_type = Type.String);
}
public Type getType() {
return _type;
}
/**
* Translate the code required for getting the node for which the
* QName, local-name or namespace URI should be extracted.
*/
public void translate(ClassGenerator classGen,
MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
il.append(methodGen.loadDOM());
// Function was called with no parameters
if (argumentCount() == 0) {
il.append(methodGen.loadContextNode());
}
// Function was called with node parameter
else if (_paramType == Type.Node) {
_param.translate(classGen, methodGen);
}
else if (_paramType == Type.Reference) {
_param.translate(classGen, methodGen);
il.append(new INVOKESTATIC(cpg.addMethodref
(BASIS_LIBRARY_CLASS,
"referenceToNodeSet",
"(Ljava/lang/Object;)" +
"Lorg/apache/xalan/xsltc/" +
"NodeIterator;")));
il.append(methodGen.nextNode());
}
// Function was called with node-set parameter
else {
_param.translate(classGen, methodGen);
_param.startResetIterator(classGen, methodGen);
il.append(methodGen.nextNode());
}
}
}