/*
* Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*
* 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: UseAttributeSets.java,v 1.5 2005/09/28 13:48:17 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.compiler;
import java.util.StringTokenizer;
import java.util.Vector;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
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.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
/**
* @author Jacek Ambroziak
* @author Santiago Pericas-Geertsen
* @author Morten Jorgensen
*/
final class UseAttributeSets extends Instruction {
// Only error that can occur:
private final static String ATTR_SET_NOT_FOUND =
"";
// Contains the names of all references attribute sets
private final Vector _sets = new Vector(2);
/**
* Constructur - define initial attribute sets to use
*/
public UseAttributeSets(String setNames, Parser parser) {
setParser(parser);
addAttributeSets(setNames);
}
/**
* This method is made public to enable an AttributeSet object to merge
* itself with another AttributeSet (including any other AttributeSets
* the two may inherit from).
*/
public void addAttributeSets(String setNames) {
if ((setNames != null) && (!setNames.equals(Constants.EMPTYSTRING))) {
final StringTokenizer tokens = new StringTokenizer(setNames);
while (tokens.hasMoreTokens()) {
final QName qname =
getParser().getQNameIgnoreDefaultNs(tokens.nextToken());
_sets.add(qname);
}
}
}
/**
* Do nada.
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
return Type.Void;
}
/**
* Generate a call to the method compiled for this attribute set
*/
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final SymbolTable symbolTable = getParser().getSymbolTable();
// Go through each attribute set and generate a method call
for (int i=0; i<_sets.size(); i++) {
// Get the attribute set name
final QName name = (QName)_sets.elementAt(i);
// Get the AttributeSet reference from the symbol table
final AttributeSet attrs = symbolTable.lookupAttributeSet(name);
// Compile the call to the set's method if the set exists
if (attrs != null) {
final String methodName = attrs.getMethodName();
il.append(classGen.loadTranslet());
il.append(methodGen.loadDOM());
il.append(methodGen.loadIterator());
il.append(methodGen.loadHandler());
il.append(methodGen.loadCurrentNode());
final int method = cpg.addMethodref(classGen.getClassName(),
methodName, ATTR_SET_SIG);
il.append(new INVOKESPECIAL(method));
}
// Generate an error if the attribute set does not exist
else {
final Parser parser = getParser();
final String atrs = name.toString();
reportError(this, parser, ErrorMsg.ATTRIBSET_UNDEF_ERR, atrs);
}
}
}
}