001    /*
002     * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
003     *
004     * Project and contact information: http://www.cascading.org/
005     *
006     * This file is part of the Cascading project.
007     *
008     * Licensed under the Apache License, Version 2.0 (the "License");
009     * you may not use this file except in compliance with the License.
010     * You may obtain a copy of the License at
011     *
012     *     http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing, software
015     * distributed under the License is distributed on an "AS IS" BASIS,
016     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017     * See the License for the specific language governing permissions and
018     * limitations under the License.
019     */
020    
021    package cascading.tuple.util;
022    
023    import cascading.tuple.Fields;
024    import cascading.tuple.Tuple;
025    import cascading.tuple.Tuples;
026    
027    /** This class is experimental and for internal use only. */
028    public class TupleViews
029      {
030      public static Tuple createComposite( Tuple... tuples )
031        {
032        return Tuples.create( new CompositeTupleList( tuples ) );
033        }
034    
035      public static Tuple createComposite( Fields... fields )
036        {
037        return Tuples.create( new CompositeTupleList( fields ) );
038        }
039    
040      public static Tuple createComposite( Fields[] fields, Tuple[] tuples )
041        {
042        return Tuples.create( new CompositeTupleList( fields, tuples ) );
043        }
044    
045      public static Tuple createNarrow( int[] basePos )
046        {
047        return Tuples.create( new NarrowTupleList( basePos ) );
048        }
049    
050      public static Tuple createNarrow( int[] basePos, Tuple tuple )
051        {
052        return Tuples.create( new NarrowTupleList( basePos, tuple ) );
053        }
054    
055      public static Tuple createOverride( Fields base, Fields override )
056        {
057        return Tuples.create( new OverrideTupleList( base, override ) );
058        }
059    
060      public static Tuple createOverride( Fields base, Tuple baseTuple, Fields override, Tuple overrideTuple )
061        {
062        return Tuples.create( new OverrideTupleList( base, baseTuple, override, overrideTuple ) );
063        }
064    
065      public static Tuple createOverride( int[] basePos, Tuple baseTuple, int[] overridePos, Tuple overrideTuple )
066        {
067        return Tuples.create( new OverrideTupleList( basePos, baseTuple, overridePos, overrideTuple ) );
068        }
069    
070      public static Tuple createObjectArray()
071        {
072        return Tuples.create( new ObjectArrayList() );
073        }
074    
075      public static Tuple createObjectArray( Object... values )
076        {
077        return Tuples.create( new ObjectArrayList( values ) );
078        }
079    
080      public static <V> Tuple reset( Tuple tuple, V... values )
081        {
082        ( (Resettable<V>) Tuple.elements( tuple ) ).reset( values );
083    
084        return tuple;
085        }
086      }