/*
* @(#)$Id$
*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001 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
* @author Morten Jorgensen
*
*/
package org.apache.xalan.xsltc.compiler;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Enumeration;
import java.util.StringTokenizer;
import org.apache.xalan.xsltc.compiler.util.Type;
import de.fub.bytecode.generic.*;
import org.apache.xalan.xsltc.compiler.util.*;
final class UseAttributeSets extends Instruction {
// Only error that can occur:
private final static String ATTR_SET_NOT_FOUND =
"Attempting to use non-existing attribute set: ";
// Contains the names of all references attribute sets
private final HashSet _sets = new HashSet(3);
/**
* 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().getQName(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();
// Get the QNames of the attribut sets we want to use
final Iterator sets = _sets.iterator();
// Go through each attribute set and generate a method call
while (sets.hasNext()) {
// Get the attribute set name
final QName name = (QName)sets.next();
// 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.loadHandler());
il.append(methodGen.loadIterator());
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 ErrorMsg msg = new ErrorMsg(ATTR_SET_NOT_FOUND+name,
getLineNumber());
getParser().reportError(Constants.ERROR, msg);
}
}
}
}