001package votorola.a.diff; // Copyright 2012-2013, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.
002
003import votorola.g.lang.*;
004import votorola.g.web.gwt.*;
005
006
007/** A difference look implemented as a JavaScript overlay type.
008  */
009public class DiffLookJS extends JavaScriptObjectX implements DiffLook
010{
011
012
013    protected DiffLookJS() {} // "precisely one constructor... protected, empty, and no-argument"
014
015
016
017   // ------------------------------------------------------------------------------------
018
019
020    /** An equator that implements DiffLook.{@linkplain DiffLook#equals(Object) #equals}
021      * for use in GWT clients.
022      */
023    public static @ThreadSafe final Equator<DiffLook> EQUATOR = new Equator<DiffLook>()
024    {
025        public boolean equals( final DiffLook d1, final DiffLook d2 ) // cf. DiffLook1.equals
026        {
027            if( d1 == null ) return d2 == null;
028
029            if( d2 == null ) return false;
030
031            return d1.key().equals(d2.key()) && d1.selectand().equals(d2.selectand());
032        }
033    };
034
035
036
037   // - D i f f - L o o k ----------------------------------------------------------------
038
039
040    public final native String key() /*-{ return this.key; }-*/;
041
042
043
044    public final native String selectand() /*-{ return this.selectand? this.selectand: "a"; }-*/;
045
046
047
048    public final native boolean toPersist()
049    /*-{
050        return this.toPersist == null? true: this.toPersist;
051    }-*/;
052
053
054}