MethodExpression.java

/*
 * Copyright (c) 2008, 2009, 2010 Denis Tulskiy
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with this work.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.tulskiy.musique.playlist.formatting.tokens;

import com.tulskiy.musique.playlist.Track;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;

/**
 * @Author: Denis Tulskiy
 * @Date: Feb 6, 2010
 */
public class MethodExpression implements Expression {
    private static Methods methods = new Methods();

    private Method method;
    private ArrayList<Expression> expressions;

    public MethodExpression(String name) {
        try {
            method = Methods.class.getDeclaredMethod(name, Track.class, ArrayList.class);
            expressions = new ArrayList<Expression>();
        } catch (NoSuchMethodException e) {
//            e.printStackTrace();
        }
    }

    public void addExpression(Expression expression) {
        expressions.add(expression);
    }

    public ArrayList<Expression> getExpressions() {
        return expressions;
    }

    public Object eval(Track track) {
        try {
            if (method != null)
                return method.invoke(methods, track, expressions);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public String toString() {
        return "MethodExpression{" +
               "method=" + method +
               '}';

    }
}