yanchor.java

GEo 地理操作源代码

/**************************************************************************************************
 **
 ** $Id: YAnchor.java,v 1.5 2004/05/06 22:05:52 desruisseaux Exp $
 **
 ** $Source: /cvsroot/geoapi/src/org/opengis/go/display/style/YAnchor.java,v $
 **
 ** Copyright (C) 2003 Open GIS Consortium, Inc. All Rights Reserved. http://www.opengis.org/Legal/
 **
 *************************************************************************************************/
package org.opengis.go.display.style;

// J2SE direct dependencies
import java.util.ArrayList;
import java.util.List;

import org.opengis.util.CodeList;
import org.opengis.util.SimpleEnumerationType;


/**
 * Defines the various YAnchor types.
 * 
 * @version $Revision: 1.5 $, $Date: 2004/05/06 22:05:52 $
 * @author <A HREF="http://www.opengis.org">OpenGIS&reg; consortium</A>
 */
public class YAnchor extends SimpleEnumerationType {
    
    //*************************************************************************
    //  Static Fields
    //*************************************************************************
    /**
     * The list of enumeration available in this virtual machine.
     * <strong>Must be declared first!</strong>.
     */
    private static final List VALUES = new ArrayList(4);
    
    /**
      * Align to the top of the field.
      */
    public static final YAnchor TOP = new YAnchor("Top", "");
    
    /**
      * Align the middle of the field.
      */
    public static final YAnchor MIDDLE = new YAnchor("Middle", "");
    
    /**
      * Align to the baseline of the field.
      */
    public static final YAnchor BASELINE = new YAnchor("Baseline", "");
    
    /**
      * Align to the bottom of the field.
      */
    public static final YAnchor BOTTOM = new YAnchor("Bottom", "");
    
    /**
     * The next value to be assigned and the count of number of styles
     * actually given out.
     */
    private static int next_value = 0;
    
    //*************************************************************************
    //  Static Methods
    //*************************************************************************
    
    /**
     * Give out the next value.
     */
    private static synchronized int nextValue() {
        return next_value++;
    }
    
    /**
     * Gets the number of <code>YAnchor</code>s that have been
     * created.
     * @return the number of styles.
     */
    public static int getNumberOfStyles() {
        return next_value;
    }
    
    //*************************************************************************
    //  Constructor
    //*************************************************************************
    
    /**
     * Construct a new YAnchor with the given name and description.
     * This constructor should only be used to make the static
     * constants in this class or by a provider subclasses to create
     * implementation specific styles that can be accessed by
     * <code>DisplayCapabilities.getSupportedYAnchors()</code>.
     *
     * @param name a String defining the name of the Arrow pattern.
     * @param description a String describing the pattern.
     */
    protected YAnchor(String name, String description) {
        super(VALUES, name, description);
    }

    //*************************************************************************
    //  Methods
    //*************************************************************************

    /**
     * Returns the list of <code>YAnchor</code>s.
     */
    public static YAnchor[] values() {
        synchronized (VALUES) {
            return (YAnchor[]) VALUES.toArray(new YAnchor[VALUES.size()]);
        }
    }

    /**
     * Returns the list of enumerations of the same kind than this enum.
     */
    public CodeList[] family() {
        return values();
    }
}