dk.ange.octave.exec.OctaveReaderCallable.java Source code

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Here is the source code for dk.ange.octave.exec.OctaveReaderCallable.java

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/*
 * Copyright 2008, 2009 Ange Optimization ApS
 *
 * 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 dk.ange.octave.exec;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.util.concurrent.Callable;

import dk.ange.octave.exception.OctaveIOException;

/**
 * Callable that reads from the octave process
 */
final class OctaveReaderCallable implements Callable<Void> {

    private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory
            .getLog(OctaveReaderCallable.class);

    private final BufferedReader processReader;

    private final ReadFunctor readFunctor;

    private final String spacer;

    /**
     * @param processReader
     * @param readFunctor
     * @param spacer
     */
    public OctaveReaderCallable(final BufferedReader processReader, final ReadFunctor readFunctor,
            final String spacer) {
        this.processReader = processReader;
        this.readFunctor = readFunctor;
        this.spacer = spacer;
    }

    @Override
    public Void call() {
        final Reader reader = new OctaveExecuteReader(processReader, spacer);
        try {
            readFunctor.doReads(reader);
        } catch (final IOException e) {
            final String message = "IOException from ReadFunctor";
            log.debug(message, e);
            throw new OctaveIOException(message, e);
        } finally {
            try {
                reader.close();
            } catch (final IOException e) {
                final String message = "IOException during close";
                log.debug(message, e);
                throw new OctaveIOException(message, e);
            }
        }
        return null;
    }

}