| // Copyright 2010 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.func; |
| |
| class LazyMapper2<T, X, Y> implements LazyFunction<Y> |
| { |
| private final Mapper2<T, X, Y> mapper; |
| |
| private final Flow<T> left; |
| |
| private final Flow<X> right; |
| |
| @SuppressWarnings("unchecked") |
| public LazyMapper2(Mapper2<T, X, Y> mapper, Flow<T> left, Flow<? extends X> right) |
| { |
| this.mapper = mapper; |
| this.left = left; |
| this.right = (Flow<X>) right; |
| } |
| |
| @Override |
| public LazyContinuation<Y> next() |
| { |
| if (left.isEmpty() || right.isEmpty()) |
| return null; |
| |
| LazyValue<Y> nextValue = new LazyMapped2Value<T, X, Y>(left, right, mapper); |
| |
| return new LazyContinuation<Y>(nextValue, new LazyMapper2<T, X, Y>(mapper, left.rest(), right.rest())); |
| } |
| } |