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'Databene Formats' is an open source software library for supporting data file and other formats like CSV, fixed width files, XLS, Properties and Regex. It is designed for multithreaded use and high performance.

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/*
 * Copyright (C) 2011-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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.databene.formats.script;

import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;

import org.databene.commons.Context;
import org.databene.commons.converter.ToStringConverter;

/**
 * Abstract implementation of the Script interface. 
 * When inheriting from it, you must overwrite at least one of the methods 
 * evaluate() and execute().
 * 
 * Created at 23.12.2008 07:15:39
 * @since 0.4.7
 * @author Volker Bergmann
 */

public abstract class AbstractScript implements Script {

	@Override
	public Object evaluate(Context context) throws ScriptException {
		try {
			StringWriter writer = new StringWriter();
			execute(context, writer);
			return writer.toString();
		} catch (IOException e) {
			throw new ScriptException(e);
		}
	}

	@Override
	public void execute(Context context, Writer out) throws ScriptException, IOException {
		out.write(ToStringConverter.convert(evaluate(context), ""));
	}
}