org.milyn.fixedlength.prog.FixedLengthListBinder Maven / Gradle / Ivy
/*
* Milyn - Copyright (C) 2006 - 2010
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License (version 2.1) as published by the Free Software
* Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License for more details:
* http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.fixedlength.prog;
import org.milyn.FilterSettings;
import org.milyn.Smooks;
import org.milyn.assertion.AssertArgument;
import org.milyn.fixedlength.FixedLengthBinding;
import org.milyn.fixedlength.FixedLengthBindingType;
import org.milyn.fixedlength.FixedLengthReaderConfigurator;
import org.milyn.payload.JavaResult;
import javax.xml.transform.stream.StreamSource;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.List;
import java.util.UUID;
/**
* Fixed Length {@link java.util.List} Binder class.
*
* Simple Fixed Length records to Object {@link java.util.List} binding class.
*
* Exmaple usage:
*
* public class PeopleBinder {
* // Create and cache the binder instance..
* private FixedLengthListBinder binder = new FixedLengthListBinder("firstname[10],lastname[10],gender[1],age[3],country[2]", Person.class);
*
* public List<Person> bind(Reader fixedLengthStream) {
* return binder.bind(fixedLengthStream);
* }
* }
*
*
*
* @author [email protected]
*/
public class FixedLengthListBinder {
private String beanId = UUID.randomUUID().toString();
private Smooks smooks;
public FixedLengthListBinder(String fields, Class recordType) {
AssertArgument.isNotNullAndNotEmpty(fields, "fields");
AssertArgument.isNotNull(recordType, "recordType");
smooks = new Smooks();
smooks.setFilterSettings(FilterSettings.DEFAULT_SAX);
smooks.setReaderConfig(new FixedLengthReaderConfigurator(fields)
.setBinding(new FixedLengthBinding(beanId, recordType, FixedLengthBindingType.LIST)));
}
public List bind(Reader fixedLengthStream) {
AssertArgument.isNotNull(fixedLengthStream, "fixedLengthStream");
JavaResult javaResult = new JavaResult();
smooks.filterSource(new StreamSource(fixedLengthStream), javaResult);
return (List) javaResult.getBean(beanId);
}
public List bind(InputStream fixedLengthStream) {
return bind(new InputStreamReader(fixedLengthStream));
}
}