tapestry-func/src/main/java/org/apache/tapestry5/func/LazyMapped2Value.java

// 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 LazyMapped2Value<T, X, Y> implements LazyValue<Y>
{
    private final Flow<T> left;

    private final Flow<X> right;

    private final Mapper2<T, X, Y> mapper;

    public LazyMapped2Value(Flow<T> left, Flow<X> right, Mapper2<T, X, Y> mapper)
    {
        this.left = left;
        this.right = right;
        this.mapper = mapper;
    }

    @Override
    public Y get()
    {
        return mapper.map(left.first(), right.first());
    }

}