dk.ange.octave.io.DataWriteFunctor.java Source code

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Here is the source code for dk.ange.octave.io.DataWriteFunctor.java

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/*
 * Copyright 2008, 2012 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.io;

import java.io.IOException;
import java.io.Writer;
import java.util.Map;

import dk.ange.octave.exception.OctaveIOException;
import dk.ange.octave.exec.WriteFunctor;
import dk.ange.octave.type.OctaveObject;

/**
 * Write data from {@link OctaveObject}s in a {@link Map}
 */
final class DataWriteFunctor implements WriteFunctor {

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

    final Map<String, OctaveObject> octaveTypes;

    /**
     * @param octaveTypes
     */
    public DataWriteFunctor(final Map<String, OctaveObject> octaveTypes) {
        this.octaveTypes = octaveTypes;
    }

    @Override
    public void doWrites(final Writer writer) {
        try {
            // Enter octave in "read data from input mode"
            log.trace("write: 'load(\"-text\", \"-\")' to start read data from input mode");
            writer.write("load(\"-text\", \"-\")\n");
            // Push the data into octave
            for (final Map.Entry<String, OctaveObject> entry : octaveTypes.entrySet()) {
                final String name = entry.getKey();
                final OctaveObject value = entry.getValue();
                if (log.isTraceEnabled()) {
                    log.trace("write: variable '" + name + "', value=<<<" + value + ">>>");
                }
                OctaveIO.write(writer, name, value);
            }
            // Exit octave from read data mode
            log.trace("write: '# name:' to exit octave from read data mode");
            writer.write("# name: \n");
            writer.flush();
        } catch (final IOException e) {
            // Will happen when we write to a dead octave process
            final String message = "Unexpected IOException";
            log.debug(message, e);
            throw new OctaveIOException(message, e);
        }
    }

}