Transformers.java

/*
 * Copyright 2013-2016 Skynav, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY SKYNAV, INC. AND ITS CONTRIBUTORS “AS IS” AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL SKYNAV, INC. OR ITS CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.skynav.ttx.transformer;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;

import com.skynav.ttx.transformer.isd.ISD;

public class Transformers {

    private static Map<String,Class<? extends AbstractTransformer>> transformerMap;
    static {
        Map<String,Class<? extends AbstractTransformer>> m = new java.util.TreeMap<String,Class<? extends AbstractTransformer>>();
        m.put(ISD.TRANSFORMER_NAME, ISD.ISDTransformer.class);
        transformerMap = Collections.unmodifiableMap(m);
    }

    public static Set<String> getTransformerNames() {
        return transformerMap.keySet();
    }

    public static Transformer getTransformer(String name, TransformerContext context) {
        Class<? extends AbstractTransformer> cls = transformerMap.get(name);
        if (cls != null) {
            try {
                Constructor<? extends AbstractTransformer> constructor = cls.getDeclaredConstructor(new Class<?>[] { TransformerContext.class });
                return constructor.newInstance(new Object[] { context });
            } catch (NoSuchMethodException e) {
                return null;
            } catch (IllegalAccessException e) {
                return null;
            } catch (InvocationTargetException e) {
                return null;
            } catch (InstantiationException e) {
                return null;
            }
        } else
            return null;
    }

    public static String getDefaultTransformerName() {
        return ISD.TRANSFORMER_NAME;
    }

    public static Transformer getDefaultTransformer(TransformerContext context) {
        return getTransformer(getDefaultTransformerName(), context);
    }

}