/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.vxquery.context;

import java.util.LinkedHashMap;
import java.util.Map;

public class ThinStaticContextImpl extends DelegatingStaticContextImpl {
    private final Map<String, String> namespaceMap;

    public ThinStaticContextImpl(StaticContext parent) {
        super(parent);
        namespaceMap = new LinkedHashMap<String, String>();
    }

    @Override
    public String lookupNamespaceUri(String prefix) {
        if (namespaceMap.containsKey(prefix)) {
            return namespaceMap.get(prefix);
        }
        if (parent != null) {
            return parent.lookupNamespaceUri(prefix);
        }
        return null;
    }

    @Override
    public void registerNamespaceUri(String prefix, String uri) {
        namespaceMap.put(prefix, uri);
    }

    @Override
    public IStaticContextFactory createFactory() {
        return ThinStaticContextImplFactory.createInstance(this);
    }
}