sundar@1524: /*
sundar@1524:  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
sundar@1524:  *
sundar@1524:  * Redistribution and use in source and binary forms, with or without
sundar@1524:  * modification, are permitted provided that the following conditions
sundar@1524:  * are met:
sundar@1524:  *
sundar@1524:  *   - Redistributions of source code must retain the above copyright
sundar@1524:  *     notice, this list of conditions and the following disclaimer.
sundar@1524:  *
sundar@1524:  *   - Redistributions in binary form must reproduce the above copyright
sundar@1524:  *     notice, this list of conditions and the following disclaimer in the
sundar@1524:  *     documentation and/or other materials provided with the distribution.
sundar@1524:  *
sundar@1524:  *   - Neither the name of Oracle nor the names of its
sundar@1524:  *     contributors may be used to endorse or promote products derived
sundar@1524:  *     from this software without specific prior written permission.
sundar@1524:  *
sundar@1524:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
sundar@1524:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
sundar@1524:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sundar@1524:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
sundar@1524:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sundar@1524:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
sundar@1524:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
sundar@1524:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
sundar@1524:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
sundar@1524:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
sundar@1524:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sundar@1524:  */
sundar@1524: 
sundar@1524: // Simple sorting with Java8 APIs
sundar@1524: 
sundar@1524: // Separation key-extraction from key ordering
sundar@1524: 
sundar@1524: // Simple demo for Comparator.comparing
sundar@1524: // http://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html#comparing-java.util.function.Function-
sundar@1524: 
sundar@1524: // data to be sorted
sundar@1524: var cards = [
sundar@1524:    { name: "hello", email: "foo@hello.com" },
sundar@1524:    { name: "world", email: "bar@world.com" },
sundar@1524:    { name: "see", email: "see@dontsee.com" },
sundar@1524: ];
sundar@1524: 
sundar@1524: var Collections = java.util.Collections;
sundar@1524: var Comparator = java.util.Comparator;
sundar@1524: 
sundar@1524: // sort records name in reverse order of names
sundar@1524: Collections.sort(cards,
sundar@1524:   Comparator.comparing(function(a) a.name).reversed());
sundar@1524: 
sundar@1524: print(JSON.stringify(cards))
sundar@1524: 
sundar@1524: // sort records by email
sundar@1524: Collections.sort(cards,
sundar@1524:   Comparator.comparing(function(a) a.email));
sundar@1524: 
sundar@1524: print(JSON.stringify(cards))