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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.
/*
* 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.Converter;
import org.databene.commons.SystemInfo;
import org.databene.commons.bean.BeanToPropertyArrayConverter;
import org.databene.commons.converter.ArrayConverter;
import org.databene.commons.converter.ConverterChain;
import org.databene.commons.converter.FormatFormatConverter;
import org.databene.commons.converter.ToStringConverter;
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 JavaBeans as flat file columns.
* Created: 07.06.2007 13:05:38
* @param the type of the objects to write
* @author Volker Bergmann
*/
public class BeanFixedWidthWriter extends ScriptedDocumentWriter {
public BeanFixedWidthWriter(Writer out, FixedWidthColumnDescriptor ... descriptors) {
this(out, (Script)null, (Script)null, descriptors);
}
public BeanFixedWidthWriter(Writer out, String headerScriptUrl, String footerScriptUrl,
FixedWidthColumnDescriptor ... descriptors)
throws IOException {
this(
out,
(headerScriptUrl != null ? ScriptUtil.readFile(headerScriptUrl) : null),
(footerScriptUrl != null ? ScriptUtil.readFile(footerScriptUrl) : null),
descriptors
);
}
public BeanFixedWidthWriter(Writer out, Script headerScript, Script footerScript,
FixedWidthColumnDescriptor ... descriptors) {
super( out, headerScript, new BeanFixedWidthScript(descriptors), footerScript);
}
// BeanFlatFileScript ----------------------------------------------------------------------------------------------
private static class BeanFixedWidthScript extends AbstractScript {
private Converter converter;
@SuppressWarnings({ "unchecked", "rawtypes" })
public BeanFixedWidthScript(FixedWidthColumnDescriptor[] descriptors) {
int length = descriptors.length;
String[] propertyNames = new String[length];
Converter[] propertyConverters = new Converter[length];
for (int i = 0; i < length; i++) {
FixedWidthColumnDescriptor descriptor = descriptors[i];
propertyNames[i] = descriptor.getName();
propertyConverters[i] = new ConverterChain(
new ToStringConverter(),
new FormatFormatConverter(String.class,
descriptor.getFormat(),
true
)
);
}
this.converter = new ConverterChain(
new BeanToPropertyArrayConverter(propertyNames),
new ArrayConverter(Object.class, String.class, propertyConverters)
);
}
@Override
public void execute(Context context, Writer out) throws IOException, ScriptException {
try {
String[] cells = converter.convert(context.get("part"));
for (int i = 0; i < cells.length; i++)
out.write(cells[i]);
out.write(SystemInfo.getLineSeparator());
} catch (ConversionException e) {
throw new ScriptException(e);
}
}
}
}