/*
* 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.Map;
import java.util.UUID;
/**
* Fixed Length {@link java.util.Map} Binder class.
* <p/>
* Simple Fixed Length records to Object {@link java.util.Map} binding class.
* <p/>
* Exmaple usage:
* <pre>
* public class PeopleBinder {
* // Create and cache the binder instance..
* private FixedLengthMapBinder binder = new FixedLengthMapBinder("firstname[10],lastname[10],gender[1],age[3],country[2]", Person.class, "firstname");
*
* public Map<String, Person> bind(Reader fixedLengthStream) {
* return binder.bind(fixedLengthStream);
* }
* }
* </pre>
*
* @author <a href="mailto:maurice.zeijen@smies.com">maurice.zeijen@smies.com</a>
*/
public class FixedLengthMapBinder {
private String beanId = UUID.randomUUID().toString();
private Smooks smooks;
public FixedLengthMapBinder(String fields, Class recordType, String keyField) {
AssertArgument.isNotNullAndNotEmpty(fields, "fields");
AssertArgument.isNotNull(recordType, "recordType");
AssertArgument.isNotNullAndNotEmpty(keyField, "keyField");
smooks = new Smooks();
smooks.setFilterSettings(FilterSettings.DEFAULT_SAX);
smooks.setReaderConfig(new FixedLengthReaderConfigurator(fields)
.setBinding(new FixedLengthBinding(beanId, recordType, FixedLengthBindingType.MAP).setKeyField(keyField)));
}
public Map bind(Reader fixedLengthStream) {
AssertArgument.isNotNull(fixedLengthStream, "fixedLengthStream");
JavaResult javaResult = new JavaResult();
smooks.filterSource(new StreamSource(fixedLengthStream), javaResult);
return (Map) javaResult.getBean(beanId);
}
public Map bind(InputStream fixedLengthStream) {
return bind(new InputStreamReader(fixedLengthStream));
}
}