// 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.internal;

import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import org.apache.tapestry5.ioc.internal.util.InternalUtils;
import org.apache.tapestry5.ioc.services.SymbolProvider;

import javax.servlet.ServletContext;
import java.util.Map;

/**
 * A wrapper around {@link ServletContext} that makes init-parameters accessible as symbols.
 */
public class ServletContextSymbolProvider implements SymbolProvider
{
    private final Map<String, String> properties = CollectionFactory.newCaseInsensitiveMap();

    public ServletContextSymbolProvider(ServletContext context)
    {
        for (String name : InternalUtils.toList(context.getInitParameterNames()))
        {
            properties.put(name, context.getInitParameter(name));
        }
    }

    public String valueForSymbol(String symbolName)
    {
        return properties.get(symbolName);
    }

}
