| // Copyright 2007 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.internal.services; |
| |
| import org.apache.tapestry.Binding; |
| import org.apache.tapestry.internal.bindings.AbstractBinding; |
| import org.apache.tapestry.ioc.Location; |
| |
| /** |
| * Wraps a {@link StringProvider} as a read-only {@link Binding}. |
| */ |
| public class AttributeExpansionBinding extends AbstractBinding |
| { |
| private final StringProvider provider; |
| |
| public AttributeExpansionBinding(StringProvider provider, Location location) |
| { |
| super(location); |
| |
| this.provider = provider; |
| } |
| |
| public Object get() |
| { |
| return provider.provideString(); |
| } |
| |
| /** |
| * Returns false. Expansions reference properties that may change arbitrarily. |
| */ |
| @Override |
| public boolean isInvariant() |
| { |
| return false; |
| } |
| |
| } |