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Xalan-Java is an XSLT processor for transforming XML documents into HTML, text, or other XML document types. It implements XSL Transformations (XSLT) Version 1.0 and XML Path Language (XPath) Version 1.0 and can be used from the command line, in an applet or a servlet, or as a module in other program.

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/*
 * 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: AttributeSet.java 468650 2006-10-28 07:03:30Z minchau $
 */

package org.apache.xalan.xsltc.compiler;

import java.util.Enumeration;
import java.util.Vector;

import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.INVOKESPECIAL;
import org.apache.bcel.generic.InstructionList;
import org.apache.xalan.xsltc.compiler.util.AttributeSetMethodGenerator;
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.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
import org.apache.xalan.xsltc.compiler.util.Util;
import org.apache.xml.utils.XML11Char;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 * @author Morten Jorgensen
 */
final class AttributeSet extends TopLevelElement {

    // This prefix is used for the method name of attribute set methods
    private static final String AttributeSetPrefix = "$as$";
    
    // Element contents
    private QName            _name;
    private UseAttributeSets _useSets;
    private AttributeSet     _mergeSet;
    private String           _method;
    private boolean          _ignore = false;
    
    /**
     * Returns the QName of this attribute set
     */
    public QName getName() {
	return _name;
    }

    /**
     * Returns the method name of this attribute set. This method name is
     * generated by the compiler (XSLTC)
     */
    public String getMethodName() {
	return _method;
    }

    /**
     * Call this method to prevent a method for being compiled for this set.
     * This is used in case several  elements constitute
     * a single set (with one name). The last element will merge itself with
     * any previous set(s) with the same name and disable the other set(s).
     */
    public void ignore() {
	_ignore = true;
    }

    /**
     * Parse the contents of this attribute set. Recognised attributes are
     * "name" (required) and "use-attribute-sets" (optional).
     */
    public void parseContents(Parser parser) {
	
	// Get this attribute set's name
        final String name = getAttribute("name");
        
        if (!XML11Char.isXML11ValidQName(name)) {
            ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, name, this);
            parser.reportError(Constants.ERROR, err);           
        }        
        _name = parser.getQNameIgnoreDefaultNs(name);
	if ((_name == null) || (_name.equals(EMPTYSTRING))) {
	    ErrorMsg msg = new ErrorMsg(ErrorMsg.UNNAMED_ATTRIBSET_ERR, this);
	    parser.reportError(Constants.ERROR, msg);
	}

	// Get any included attribute sets (similar to inheritance...)
	final String useSets = getAttribute("use-attribute-sets");
	if (useSets.length() > 0) {
            if (!Util.isValidQNames(useSets)) {
                ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_QNAME_ERR, useSets, this);
                parser.reportError(Constants.ERROR, err);	
            }		
	    _useSets = new UseAttributeSets(useSets, parser);
	}

	// Parse the contents of this node. All child elements must be
	//  elements. Other elements cause an error.
	final Vector contents = getContents();
	final int count = contents.size();
	for (int i=0; i