001// Licensed under the Apache License, Version 2.0 (the "License");
002// you may not use this file except in compliance with the License.
003// You may obtain a copy of the License at
004//
005//     http://www.apache.org/licenses/LICENSE-2.0
006//
007// Unless required by applicable law or agreed to in writing, software
008// distributed under the License is distributed on an "AS IS" BASIS,
009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
010// See the License for the specific language governing permissions and
011// limitations under the License.
012
013package org.apache.tapestry5.internal.bindings;
014
015import org.apache.tapestry5.Binding;
016import org.apache.tapestry5.ComponentResources;
017import org.apache.tapestry5.beanmodel.PropertyConduit;
018import org.apache.tapestry5.beanmodel.services.PropertyConduitSource;
019import org.apache.tapestry5.commons.Location;
020import org.apache.tapestry5.commons.internal.services.StringInterner;
021import org.apache.tapestry5.services.BindingFactory;
022
023/**
024 * Binding factory for reading and updating JavaBean properties.
025 *
026 * Expression are evaluated via a {@link PropertyConduit}, which is generated by {@link PropertyConduitSource} (which
027 * therefore defines the expression language).
028 */
029public class PropBindingFactory implements BindingFactory
030{
031    private final PropertyConduitSource source;
032
033    private final StringInterner interner;
034
035    public PropBindingFactory(PropertyConduitSource propertyConduitSource, StringInterner interner)
036    {
037        source = propertyConduitSource;
038        this.interner = interner;
039    }
040
041    public Binding newBinding(String description, ComponentResources container,
042                              ComponentResources component, String expression, Location location)
043    {
044        Object target = container.getComponent();
045        Class targetClass = target.getClass();
046
047        PropertyConduit conduit = source.create(targetClass, expression);
048
049        String toString = interner.format("PropBinding[%s %s(%s)]", description, container
050                .getCompleteId(), expression);
051
052        return new PropBinding(location, target, conduit, expression, toString);
053    }
054}