package org.apache.ws.java2wsdl.bytecode;

import java.lang.reflect.Method;
import java.util.HashMap;
/*
* 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.
*
*/

public class MethodTable {

    private HashMap nameToMethodMap;
    private ChainedParamReader cpr;

    public MethodTable(Class cls) throws Exception {
        cpr = new ChainedParamReader(cls);
        nameToMethodMap = new HashMap();
        loadMethods(cls);
    }

    /**
     * To load all the methods in the given class by Java reflection
     *
     * @param cls
     * @throws Exception
     */
    private void loadMethods(Class cls) throws Exception {
        Method [] methods = cls.getMethods();
        for (int i = 0; i < methods.length; i++) {
            Method method = methods[i];
            nameToMethodMap.put(method.getName(), method);
        }
    }

    public String [] getParameterNames(String methodName) {
        Method method = (Method) nameToMethodMap.get(methodName);
        if (method == null) {
            return null;
        }
        return cpr.getParameterNames(method);
    }


}