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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.skynet.core.relation.order;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map.Entry;
import org.eclipse.osee.framework.core.data.RelationSorter;
import org.eclipse.osee.framework.jdk.core.type.OseeArgumentException;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.type.Pair;
import org.eclipse.osee.framework.jdk.core.util.io.xml.AbstractSaxHandler;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
/**
* @author Roberto E. Escobar
*/
public class RelationOrderParser {
private static final Object ROOT_ELEMENT = "OrderList";
private static final ThreadLocal<XMLReader> localReader = new ThreadLocal<XMLReader>() {
@Override
protected XMLReader initialValue() {
try {
return XMLReaderFactory.createXMLReader();
} catch (SAXException ex) {
ex.printStackTrace();
return null;
}
}
};
public synchronized void loadFromXml(RelationOrderData data, String value) throws OseeCoreException {
if (data == null) {
throw new OseeArgumentException("RelationOrderData object cannot be null");
}
data.clear();
if (value != null && value.trim().length() > 0) {
try {
XMLReader xmlReader = localReader.get();
xmlReader.setContentHandler(new RelationOrderSaxHandlerLite(data));
xmlReader.parse(new InputSource(new StringReader(value)));
} catch (SAXException ex) {
OseeCoreException.wrapAndThrow(ex);
} catch (IOException ex) {
OseeCoreException.wrapAndThrow(ex);
}
}
}
public String toXml(RelationOrderData data) throws OseeArgumentException {
if (data == null) {
throw new OseeArgumentException("RelationOrderData object cannot be null");
}
StringBuilder sb = new StringBuilder();
openRoot(sb);
for (Entry<Pair<String, String>, Pair<RelationSorter, List<String>>> entry : data.getOrderedEntrySet()) {
writeEntry(sb, entry);
sb.append("\n");
}
closeRoot(sb);
return sb.toString();
}
private void openRoot(StringBuilder sb) {
sb.append("<");
sb.append(ROOT_ELEMENT);
sb.append(">\n");
}
private void closeRoot(StringBuilder sb) {
sb.append("</");
sb.append(ROOT_ELEMENT);
sb.append(">");
}
private void writeEntry(StringBuilder sb, Entry<Pair<String, String>, Pair<RelationSorter, List<String>>> entry) {
Pair<String, String> key = entry.getKey();
sb.append("<");
sb.append("Order ");
sb.append("relType=\"");
sb.append(key.getFirst());
sb.append("\" side=\"");
sb.append(key.getSecond());
sb.append("\" orderType=\"");
Pair<RelationSorter, List<String>> value = entry.getValue();
sb.append(value.getFirst().getGuid());
List<String> guids = value.getSecond();
if (guids != null) {
if (guids.size() > 0) {
sb.append("\" list=\"");
}
for (int i = 0; i < guids.size(); i++) {
sb.append(guids.get(i));
if (i + 1 < guids.size()) {
sb.append(",");
}
}
}
sb.append("\"");
sb.append("/>");
}
private final static class RelationOrderSaxHandlerLite extends AbstractSaxHandler {
private final RelationOrderData data;
private RelationOrderSaxHandlerLite(RelationOrderData data) {
this.data = data;
}
@Override
public void endElementFound(String uri, String localName, String qName) {
// do nothing
}
@Override
public void startElementFound(String uri, String localName, String qName, Attributes attributes) {
if ("Order".equals(localName)) {
String relationType = attributes.getValue("relType");
String relationSide = attributes.getValue("side");
String orderType = attributes.getValue("orderType");
String list = attributes.getValue("list");
if (relationType != null && orderType != null && relationSide != null) {
List<String> guidsList = Collections.emptyList();
if (list != null) {
String[] guids = list.split(",");
guidsList = new ArrayList<>();
Collections.addAll(guidsList, guids);
}
data.addOrderList(relationType, relationSide, RelationSorter.valueOfGuid(orderType), guidsList);
}
}
}
}
}
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