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Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2007, 2009 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.tapestry5.internal.services;
import org.apache.tapestry5.Binding;
import org.apache.tapestry5.internal.bindings.AbstractBinding;
import org.apache.tapestry5.ioc.Location;
/**
* Wraps a {@link StringProvider} as a read-only {@link Binding}.
*/
public class AttributeExpansionBinding extends AbstractBinding
{
private final StringProvider provider;
public AttributeExpansionBinding(Location location, StringProvider provider)
{
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;
}
}