org.modeldriven.fuml.xmi.XmiReferenceAttribute.java Source code

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Here is the source code for org.modeldriven.fuml.xmi.XmiReferenceAttribute.java

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/*
 * Copyright 2008 Lockheed Martin Corporation, except as stated in the file 
 * entitled Licensing-Information. All modifications copyright 2009 Data Access Technologies, Inc. Licensed under the Academic Free License 
 * version 3.0 (http://www.opensource.org/licenses/afl-3.0.php), except as stated 
 * in the file entitled Licensing-Information. 
 *
 * Contributors:
 *   MDS - initial API and implementation
 *
 */

package org.modeldriven.fuml.xmi;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.StringTokenizer;

import javax.xml.stream.events.Attribute;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.modeldriven.fuml.repository.Classifier;

/**
 * This class is an XmiReference implementation holding reference data and 
 * related information found within XML attributes. An attribute may hold any 
 * number of references to entities within a mode, separated by space (' ') character 
 * delimiters. Only "internal" references are found in XML attributes within an XMI 
 * formatted source. Internal references target model entities found in the same source 
 * XMI as the reference. For more information on XMI references, see the XmiReference 
 * interface documentation.
 * 
 * @author Scott Cinnamond
 */
public class XmiReferenceAttribute implements XmiReference {

    private static Log log = LogFactory.getLog(XmiReferenceElement.class);
    private XmiNode node;
    private Attribute attribute;
    private List<String> ids = new ArrayList<String>();
    protected Classifier classifier;

    @SuppressWarnings("unused")
    private XmiReferenceAttribute() {
    }

    public XmiReferenceAttribute(XmiNode node, Attribute attribute, Classifier classifier) {
        this.node = node;
        this.attribute = attribute;
        this.classifier = classifier;
        construct();
    }

    public Classifier getClassifier() {
        return this.classifier;
    }

    public XmiNode getXmiNode() {
        return this.node;
    }

    private void construct() {
        String data = this.attribute.getValue();
        if (data != null) {
            StringTokenizer st = new StringTokenizer(data);
            if (!st.hasMoreElements())
                throw new XmiException("one or more id's expected");
            while (st.hasMoreElements()) {
                String ref = st.nextToken();
                ids.add(ref);
            }
        } else
            log.warn("expected value for attribute, " + this.attribute.getName().getLocalPart());
    }

    public String getLocalName() {
        return this.attribute.getName().getLocalPart();
    }

    public int getLineNumber() {
        return node.getLineNumber();
    }

    public int getColumnNumber() {
        return node.getColumnNumber();
    }

    public int getReferenceCount() {
        return ids.size();
    }

    public Iterator<String> getXmiIds() {
        return ids.iterator();
    }

}