    001// Copyright 2006, 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.PropertyConduit;
    020import org.apache.tapestry5.internal.services.StringInterner;
    021import org.apache.tapestry5.ioc.Location;
    022import org.apache.tapestry5.services.BindingFactory;
    023import org.apache.tapestry5.services.PropertyConduitSource;
    024
    025/**
    026 * Binding factory for reading and updating JavaBean properties.
    027 * <p/>
    028 * Expression are evaluated via a {@link PropertyConduit}, which is generated by {@link PropertyConduitSource} (which
    029 * therefore defines the expression language).
    030 */
    031public class PropBindingFactory implements BindingFactory
    032{
    033    private final PropertyConduitSource source;
    034
    035    private final StringInterner interner;
    036
    037    public PropBindingFactory(PropertyConduitSource propertyConduitSource, StringInterner interner)
    038    {
    039        source = propertyConduitSource;
    040        this.interner = interner;
    041    }
    042
    043    public Binding newBinding(String description, ComponentResources container,
    044                              ComponentResources component, String expression, Location location)
    045    {
    046        Object target = container.getComponent();
    047        Class targetClass = target.getClass();
    048
    049        PropertyConduit conduit = source.create(targetClass, expression);
    050
    051        String toString = interner.format("PropBinding[%s %s(%s)]", description, container
    052                .getCompleteId(), expression);
    053
    054        return new PropBinding(location, target, conduit, expression, toString);
    055    }
    056}