    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
    015    package org.apache.tapestry5.internal.bindings;
    016
    017    import org.apache.tapestry5.Binding;
    018    import org.apache.tapestry5.ComponentResources;
    019    import org.apache.tapestry5.FieldTranslator;
    020    import org.apache.tapestry5.internal.services.StringInterner;
    021    import org.apache.tapestry5.ioc.Location;
    022    import org.apache.tapestry5.services.BindingFactory;
    023    import 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     */
    029    public 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    }