org.apache.batik.svggen.SVGAttribute Maven / Gradle / Ivy

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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.

 */
package org.apache.batik.svggen;

import java.util.HashSet;
import java.util.Set;

/**
 * Represents an SVG attribute and provides convenience
 * methods to determine whether or not the attribute applies
 * to a given element type.
 *
 * @author Vincent Hardy
 * @version $Id: SVGAttribute.java 475477 2006-11-15 22:44:28Z cam $
 */
public class SVGAttribute {
    /**
     * SVG syntax for the attribute
     */
    private String name;

    /**
     * Set of Element tags to which the attribute does or
     * does not apply.
     */
    private Set applicabilitySet;

    /**
     * Controls the semantic of applicabilitySet. If
     * true, then the applicabilitySet contains the elments
     * to which the attribute applies. If false, the
     * Set contains the elements to which the attribute
     * does not apply.
     */
    private boolean isSetInclusive;

    /**
     * @param applicabilitySet Set of Element tags (Strings) to which
     *        the attribute applies
     * @param isSetInclusive defines whether elements in applicabilitySet
     *        define the list of elements to which the attribute
     *        applies or to which it does not apply
     */
    public SVGAttribute(Set applicabilitySet, boolean isSetInclusive){
        if(applicabilitySet == null)
            applicabilitySet = new HashSet();

        this.applicabilitySet = applicabilitySet;
        this.isSetInclusive = isSetInclusive;
    }

    /**
     * @param tag the tag of the Element to which the attribute
     *        could apply.
     * @return true if the attribute applies to the given Element
     */
    public boolean appliesTo(String tag){
        boolean tagInMap = applicabilitySet.contains(tag);
        if(isSetInclusive)
            return tagInMap;
        else
            return !tagInMap;
    }
}