tapestry/tapestry-framework/src/java/org/apache/tapestry/services/impl/PropertyObjectProvider.java

// Copyright 2004, 2005 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.services.impl;

import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.Location;
import org.apache.hivemind.internal.Module;
import org.apache.hivemind.service.ObjectProvider;
import org.apache.tapestry.engine.IPropertySource;

/**
 * An implementation of {@link org.apache.hivemind.service.ObjectProvider}
 * that gets the actual value from the
 * <code>tapestry.GlobalPropertySource</code> service.
 *
 * @author Howard Lewis Ship
 * @since 4.0
 */
public class PropertyObjectProvider implements ObjectProvider
{
    private IPropertySource _source;

    /**
     * Gets the value; the locator is the key passed to
     * {@link IPropertySource#getPropertyValue(String)}.
     */
    public Object provideObject(
        Module contributingModule,
        Class propertyType,
        String locator,
        Location location)
    {
        try
        {
            return _source.getPropertyValue(locator);
        }
        catch (Exception ex)
        {
            throw new ApplicationRuntimeException(ex.getMessage(), location, ex);
        }
    }

    public void setSource(IPropertySource source)
    {
        _source = source;
    }

}