    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
    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.PropertyConduit;
    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.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     */
    031    public 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    }