// 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.tapestry5.ioc.internal.services;
import org.apache.tapestry5.ioc.AnnotationProvider;
import org.apache.tapestry5.ioc.ObjectLocator;
import org.apache.tapestry5.ioc.ObjectProvider;
import org.apache.tapestry5.ioc.annotations.IntermediateType;
import org.apache.tapestry5.ioc.annotations.Value;
import org.apache.tapestry5.ioc.services.Builtin;
import org.apache.tapestry5.ioc.services.SymbolSource;
import org.apache.tapestry5.ioc.services.TypeCoercer;
/**
* Provides an object when the {@link Value} annotation is present. The string value has symbols expanded, and then is
* {@link TypeCoercer coerced} to the associated type. The value may first be coerced to an intermediate type if the
* {@link IntermediateType} annotation is present.
*/
public class ValueObjectProvider implements ObjectProvider
{
private final SymbolSource symbolSource;
private final TypeCoercer typeCoercer;
public ValueObjectProvider(@Builtin SymbolSource symbolSource,
@Builtin TypeCoercer typeCoercer)
{
this.symbolSource = symbolSource;
this.typeCoercer = typeCoercer;
}
@Override
public <T> T provide(Class<T> objectType, AnnotationProvider annotationProvider, ObjectLocator locator)
{
Value annotation = annotationProvider.getAnnotation(Value.class);
if (annotation == null) return null;
String value = annotation.value();
Object expanded = symbolSource.expandSymbols(value);
IntermediateType intermediate = annotationProvider.getAnnotation(IntermediateType.class);
if (intermediate != null) expanded = typeCoercer.coerce(expanded, intermediate.value());
return typeCoercer.coerce(expanded, objectType);
}
}