    001// Copyright 2007, 2008, 2009 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
    015package org.apache.tapestry5.internal.bindings;
    016
    017import org.apache.tapestry5.Binding;
    018import org.apache.tapestry5.ComponentResources;
    019import org.apache.tapestry5.FieldTranslator;
    020import org.apache.tapestry5.commons.Location;
    021import org.apache.tapestry5.commons.internal.services.StringInterner;
    022import org.apache.tapestry5.services.BindingFactory;
    023import org.apache.tapestry5.services.FieldTranslatorSource;
    024
    025/**
    026 * Interprets the binding expression as the name of a {@link org.apache.tapestry5.Translator} provided by the {@link
    027 * org.apache.tapestry5.services.TranslatorSource}.
    028 */
    029public class TranslateBindingFactory implements BindingFactory
    030{
    031    private final FieldTranslatorSource source;
    032
    033    private final StringInterner interner;
    034
    035    public TranslateBindingFactory(FieldTranslatorSource source, StringInterner interner)
    036    {
    037        this.source = source;
    038        this.interner = interner;
    039    }
    040
    041    public Binding newBinding(String description, ComponentResources container,
    042                              final ComponentResources component, final String expression, Location location)
    043    {
    044        return new InvariantBinding(location, FieldTranslator.class, interner.intern(description + ": " + expression))
    045        {
    046            public Object get()
    047            {
    048                return source.createTranslator(component, expression);
    049            }
    050        };
    051    }
    052}