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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.fixedwidth;

import org.databene.commons.Context;
import org.databene.commons.ConversionException;
import org.databene.commons.SystemInfo;
import org.databene.formats.script.AbstractScript;
import org.databene.formats.script.Script;
import org.databene.formats.script.ScriptException;
import org.databene.formats.script.ScriptUtil;
import org.databene.formats.script.ScriptedDocumentWriter;

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

/**
 * Writes arrays as flat file columns.
 * Created: 07.06.2007 13:05:38
 * @param  the type of the objects to write
 * @author Volker Bergmann
 */
public class ArrayFixedWidthWriter extends ScriptedDocumentWriter {

    public ArrayFixedWidthWriter(Writer out, FixedWidthRowTypeDescriptor descriptor) {
        this(out, (Script) null, (Script) null, descriptor);
    }

    public ArrayFixedWidthWriter(Writer out, String headerScriptUrl, String footerScriptUrl, FixedWidthRowTypeDescriptor descriptor)
            throws IOException {
        this(
            out,
            (headerScriptUrl != null ? ScriptUtil.readFile(headerScriptUrl) : null),
            (footerScriptUrl != null ? ScriptUtil.readFile(footerScriptUrl) : null),
            descriptor
        );
    }

    public ArrayFixedWidthWriter(Writer out, Script headerScript, Script footerScript, FixedWidthRowTypeDescriptor descriptors) {
        super(
            out,
            headerScript,
            new ArrayFixedWidthScript(descriptors),
            footerScript
        );
    }

    // ArrayFlatFileScript ---------------------------------------------------------------------------------------------

    private static class ArrayFixedWidthScript extends AbstractScript {

        private FixedWidthRowTypeDescriptor descriptor;

        public ArrayFixedWidthScript(FixedWidthRowTypeDescriptor descriptor) {
            this.descriptor = descriptor;
        }

        @Override
        public void execute(Context context, Writer out) throws IOException, ScriptException {
            try {
                Object[] cellsOfCurrentRow = (Object[]) context.get("part");
                out.write(descriptor.formatArray(cellsOfCurrentRow));
                out.write(SystemInfo.getLineSeparator());
            } catch (ConversionException e) {
                throw new ScriptException(e);
            }
        }
    }

}