001    // Copyright 2010 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.func;
016    
017    public class LazyZipValue<A, B> implements LazyValue<Tuple<A, B>>
018    {
019        private final Flow<A> aFlow;
020    
021        private final Flow<B> bFlow;
022    
023        public LazyZipValue(Flow<A> aFlow, Flow<B> bFlow)
024        {
025            this.aFlow = aFlow;
026            this.bFlow = bFlow;
027        }
028    
029        public Tuple<A, B> get()
030        {
031            return new Tuple<A, B>(aFlow.first(), bFlow.first());
032        }
033    }