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The NeoDatis Object Database
/*
NeoDatis ODB : Native Object Database ([email protected])
Copyright (C) 2007 NeoDatis Inc. http://www.neodatis.org
"This file is part of the NeoDatis ODB open source object database".
NeoDatis ODB is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
NeoDatis ODB 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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.neodatis.odb.xml;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Date;
import java.util.Iterator;
import org.neodatis.odb.ODB;
import org.neodatis.odb.ODBRuntimeException;
import org.neodatis.odb.Objects;
import org.neodatis.odb.OdbConfiguration;
import org.neodatis.odb.core.NeoDatisError;
import org.neodatis.odb.core.layers.layer2.meta.AbstractObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.ArrayObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.AtomicNativeObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.ClassAttributeInfo;
import org.neodatis.odb.core.layers.layer2.meta.ClassInfo;
import org.neodatis.odb.core.layers.layer2.meta.CollectionObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.EnumNativeObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.MapObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.MetaModel;
import org.neodatis.odb.core.layers.layer2.meta.NativeObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.NonNativeNullObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.NonNativeObjectInfo;
import org.neodatis.odb.core.layers.layer2.meta.ODBType;
import org.neodatis.odb.core.layers.layer3.IStorageEngine;
import org.neodatis.odb.impl.core.layers.layer3.engine.Dummy;
import org.neodatis.odb.impl.core.layers.layer3.engine.StorageEngineConstant;
import org.neodatis.odb.impl.core.query.criteria.CriteriaQuery;
import org.neodatis.odb.xml.tool.XMLGenerator;
import org.neodatis.odb.xml.tool.XMLNode;
import org.neodatis.tool.ConsoleLogger;
import org.neodatis.tool.ILogger;
/**
* The class that export a whole database to a xml file
*
*TODO encode the string to elimite special characters like <,>, ', ", $
*
* < => < > => > & => & " => " ' => '
*
* @author olivier
*
*/
public class XMLExporter {
private IStorageEngine storageEngine;
private ILogger externalLogger;
public XMLExporter(IStorageEngine storageEngine) {
this.storageEngine = storageEngine;
}
public XMLExporter(ODB odb) {
this.storageEngine = Dummy.getEngine(odb);
}
public void export(String directory, String filename) throws Exception {
if (!storageEngine.isLocal()) {
throw new ODBRuntimeException(NeoDatisError.NOT_YET_IMPLEMENTED.addParameter("Export in Client Server mode"));
}
String baseName = storageEngine.getBaseIdentification().getIdentification();
String completeFileName = directory + "/" + filename;
XMLGenerator.setIncrementalWriteOn(completeFileName);
info("Exporting database ODB database " + baseName + " to " + completeFileName);
XMLNode root = XMLGenerator.createRoot(XmlTags.TAG_ODB);
root.addAttribute(XmlTags.ATTRIBUTE_NAME, format(baseName));
root.addAttribute(XmlTags.ATTRIBUTE_EXPORT_DATE, format(new Date()));
root.addAttribute(XmlTags.ATTRIBUTE_MAX_OID, String.valueOf(storageEngine.getMaxOid().getObjectId()));
root.addAttribute(XmlTags.ATTRIBUTE_FILE_FORMAT_VERSION, String.valueOf(StorageEngineConstant.CURRENT_FILE_FORMAT_VERSION));
root.endHeader();
buildMetaModelXml(root);
buildObjectsXml(root);
root.end();
XMLGenerator.close();
info("End of Export");
}
private void buildObjectsXml(XMLNode root) throws Exception {
XMLNode objectsXml = root.createNode(XmlTags.TAG_OBJECTS);
objectsXml.endHeader();
MetaModel metaModel = storageEngine.getSession(true).getMetaModel();
info("Exporting Objects of " + metaModel.getNumberOfUserClasses() + " classes");
Iterator iterator = metaModel.getUserClasses().iterator();
while (iterator.hasNext()) {
ClassInfo ci = (ClassInfo) iterator.next();
buildObjectsOfClassXml(objectsXml, ci);
}
objectsXml.end();
info("Exporting Objects done.");
}
private void buildObjectsOfClassXml(XMLNode objectsXml, ClassInfo ci) throws Exception {
try{
info(". Exporting Objects of " + ci.getFullClassName() + " (" + ci.getNumberOfObjects() + ")");
Objects objects = storageEngine.getObjectInfos(new CriteriaQuery(ci.getFullClassName()), false, -1, -1, false);
int i = 0;
while (objects.hasNext()) {
Object o = objects.next();
AbstractObjectInfo aoi = (AbstractObjectInfo) o;
buildOneObjectXml(objectsXml, ci, (NonNativeObjectInfo) aoi);
i++;
if (i % 10000 == 0) {
info(". " + i + " objects");
}
}
info(". Done." + i + " objects");
objects.clear();
objects = null;
storageEngine.getSession(true).clearCache();
}catch (Exception e) {
System.err.println("Error while exporting objects of class "+ ci.getFullClassName());
throw e;
}
}
private void buildOneObjectXml(XMLNode node, ClassInfo ci, NonNativeObjectInfo nnoi) throws UnsupportedEncodingException {
XMLNode objectXml = node.createNode(XmlTags.TAG_OBJECT);
objectXml.addAttribute(XmlTags.ATTRIBUTE_OID, String.valueOf(nnoi.getOid()));
objectXml.addAttribute(XmlTags.ATTRIBUTE_CLASS_ID, String.valueOf(ci.getId()));
objectXml.endHeader();
int attributeId = -1;
AbstractObjectInfo aoi = null;
int maxId = ci.getMaxAttributeId();
// WARNING IDs start with 1 and not 0
for (int id = 1; id <= maxId; id++) {
XMLNode attributeXml = objectXml.createNode(XmlTags.TAG_ATTRIBUTE);
ClassAttributeInfo cai = ci.getAttributeInfoFromId(id);
if (cai == null) {
continue;
}
attributeId = cai.getId();
aoi = nnoi.getAttributeValueFromId(attributeId);
attributeXml.addAttribute(XmlTags.ATTRIBUTE_ID, String.valueOf(id));
attributeXml.addAttribute(XmlTags.ATTRIBUTE_NAME, cai.getName());
if (aoi.isNative()) {
if (aoi.isNull()) {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_NULL, "true");
} else if (cai.getAttributeType().isCollection()) {
CollectionObjectInfo coi = (CollectionObjectInfo) aoi;
attributeXml.addAttribute(XmlTags.ATTRIBUTE_TYPE, XmlTags.ATTRIBUTE_COLLECTION);
attributeXml.endHeader();
buildListXml(attributeXml, coi);
} else if (cai.getAttributeType().isMap()) {
MapObjectInfo moi = (MapObjectInfo) aoi;
attributeXml.addAttribute(XmlTags.ATTRIBUTE_TYPE, XmlTags.ATTRIBUTE_MAP);
attributeXml.endHeader();
buildMapXml(attributeXml, moi);
} else if (cai.getAttributeType().isArray()) {
ArrayObjectInfo aroi = (ArrayObjectInfo) aoi;
attributeXml.addAttribute(XmlTags.ATTRIBUTE_TYPE, XmlTags.ATTRIBUTE_ARRAY);
attributeXml.endHeader();
buildArrayXml(attributeXml, aroi);
} else if (nnoi.getAttributeValueFromId(id) != null) {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_VALUE, format(aoi));
} else {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_NULL, "true");
}
} else {
if (nnoi.getAttributeValueFromId(id) instanceof NonNativeNullObjectInfo) {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_NULL, "true");
} else if (nnoi.getAttributeValueFromId(id).isDeletedObject()) {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_DELETED, "true");
} else {
attributeXml.addAttribute(XmlTags.ATTRIBUTE_OBJECT_REF_ID, String.valueOf(((NonNativeObjectInfo) aoi).getOid()));
}
}
attributeXml.end();
}
objectXml.end();
}
private String format(Object object) throws UnsupportedEncodingException {
if (object instanceof Date) {
Date date = (Date) object;
return String.valueOf(date.getTime());
}
if (object instanceof AtomicNativeObjectInfo) {
AtomicNativeObjectInfo an = (AtomicNativeObjectInfo) object;
if (an.getObject() instanceof Date) {
Date date = (Date) an.getObject();
return String.valueOf(date.getTime());
// return //Formater.dateToString((Date) object);
}
if (an.getObject() instanceof String) {
String s = (String) an.getObject();
String encoding = OdbConfiguration.getDatabaseCharacterEncoding();
if (encoding == null || encoding.equals(StorageEngineConstant.NO_ENCODING)) {
return URLEncoder.encode(s);
}
return URLEncoder.encode(s, encoding);
}
}
return URLEncoder.encode(object.toString());
}
private void buildListXml(XMLNode node, CollectionObjectInfo coi) {
if (coi.isNull()) {
node.createNode(XmlTags.TAG_NULL_COLLECTION).end();
}
XMLNode element = null;
XMLNode listXml = node.createNode(XmlTags.TAG_COLLECTION);
listXml.addAttribute(XmlTags.ATTRIBUTE_REAL_CLASS_NAME, coi.getRealCollectionClassName());
listXml.addAttribute(XmlTags.ATTRIBUTE_SIZE, "" + coi.getCollection().size());
listXml.endHeader();
Iterator iterator = coi.getCollection().iterator();
while (iterator.hasNext()) {
AbstractObjectInfo aoi = (AbstractObjectInfo) iterator.next();
element = listXml.createNode(XmlTags.TAG_ELEMENT);
if (aoi.isNative()) {
NativeObjectInfo noi = (NativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_VALUE, String.valueOf(noi.getObject()));
element.addAttribute(XmlTags.ATTRIBUTE_TYPE, ODBType.getNameFromId(aoi.getOdbTypeId()));
} else {
NonNativeObjectInfo nnoi = (NonNativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_OBJECT_REF_ID, String.valueOf(nnoi.getOid()));
}
element.end();
}
listXml.end();
}
private void buildArrayXml(XMLNode node, ArrayObjectInfo aoi) throws UnsupportedEncodingException {
if (aoi.isNull()) {
node.createNode(XmlTags.TAG_NULL_ARRAY).end();
}
XMLNode element = null;
XMLNode listXml = node.createNode(XmlTags.TAG_ARRAY);
listXml.addAttribute(XmlTags.ATTRIBUTE_ARRAY_OF, aoi.getRealArrayComponentClassName());
listXml.addAttribute(XmlTags.ATTRIBUTE_SIZE, "" + aoi.getArrayLength());
listXml.endHeader();
for (int i = 0; i < aoi.getArrayLength(); i++) {
AbstractObjectInfo aboi = (AbstractObjectInfo) aoi.getArray()[i];
element = listXml.createNode(XmlTags.TAG_ELEMENT);
if (aboi.isNative()) {
if (aboi.isNull()) {
element.addAttribute(XmlTags.ATTRIBUTE_NULL, "true");
} else {
NativeObjectInfo noi = (NativeObjectInfo) aboi;
element.addAttribute(XmlTags.ATTRIBUTE_VALUE, format(noi.getObject().toString()));
}
} else {
if (aboi.isNull()) {
element.addAttribute(XmlTags.ATTRIBUTE_NULL, "true");
} else {
NonNativeObjectInfo nnoi = (NonNativeObjectInfo) aboi;
element.addAttribute(XmlTags.ATTRIBUTE_OBJECT_REF_ID, String.valueOf(nnoi.getOid()));
}
}
element.end();
}
listXml.end();
}
private void buildMapXml(XMLNode node, MapObjectInfo moi) throws UnsupportedEncodingException {
if (moi.isNull()) {
node.createNode(XmlTags.TAG_NULL_MAP).end();
}
XMLNode element = null;
XMLNode listXml = node.createNode(XmlTags.TAG_MAP);
listXml.addAttribute(XmlTags.ATTRIBUTE_REAL_CLASS_NAME, moi.getRealMapClassName());
listXml.addAttribute(XmlTags.ATTRIBUTE_SIZE, "" + moi.getMap().size());
listXml.endHeader();
Iterator iterator = moi.getMap().keySet().iterator();
while (iterator.hasNext()) {
Object o = iterator.next();
AbstractObjectInfo aoi = (AbstractObjectInfo) o;
element = listXml.createNode(XmlTags.TAG_ELEMENT);
if (aoi.isNative()) {
NativeObjectInfo noi = (NativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_KEY_VALUE, format(String.valueOf(noi.getObject())));
element.addAttribute(XmlTags.ATTRIBUTE_KEY_TYPE, ODBType.getNameFromId(aoi.getOdbTypeId()));
if(noi.isEnumObject()){
EnumNativeObjectInfo enoi = (EnumNativeObjectInfo) noi;
element.addAttribute(XmlTags.ATTRIBUTE_ENUM_CLASS_OID, String.valueOf(enoi.getEnumClassInfo().getId().getObjectId()));
}
} else {
NonNativeObjectInfo nnoi = (NonNativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_KEY_ID, String.valueOf(nnoi.getOid()));
}
aoi = (AbstractObjectInfo) moi.getMap().get(aoi);
if (aoi.isNative()) {
NativeObjectInfo noi = (NativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_VALUE, format( String.valueOf(noi.getObject())));
element.addAttribute(XmlTags.ATTRIBUTE_VALUE_TYPE, ODBType.getNameFromId(aoi.getOdbTypeId()));
} else {
NonNativeObjectInfo nnoi = (NonNativeObjectInfo) aoi;
element.addAttribute(XmlTags.ATTRIBUTE_OBJECT_REF_ID, String.valueOf(nnoi.getOid()));
}
element.end();
}
listXml.end();
}
private void buildMetaModelXml(XMLNode root) throws Exception {
XMLNode metaModelXml = root.createNode(XmlTags.TAG_METAMODEL);
metaModelXml.endHeader();
MetaModel metaModel = storageEngine.getSession(true).getMetaModel();
info("Exporting MetaModel : " + metaModel.getNumberOfClasses() + " classes");
Iterator iterator = metaModel.getAllClasses().iterator();
while (iterator.hasNext()) {
ClassInfo ci = (ClassInfo) iterator.next();
buildClassInfoXml(metaModelXml, ci);
}
info("Exporting MetaModel done");
}
private void buildClassInfoXml(XMLNode node, ClassInfo ci) {
XMLNode classXml = node.createNode(XmlTags.TAG_CLASS);
classXml.addAttribute(XmlTags.ATTRIBUTE_ID, String.valueOf(ci.getId()));
classXml.addAttribute(XmlTags.ATTRIBUTE_NAME, ci.getFullClassName());
// FIXME manage extra info
classXml.endHeader();
info(". Class " + ci.getFullClassName());
for (int i = 0; i < ci.getAttributes().size(); i++) {
ClassAttributeInfo cai = ci.getAttributeInfo(i);
buildClassAttributeXml(classXml, cai, i + 1);
}
classXml.end();
}
private void buildClassAttributeXml(XMLNode node, ClassAttributeInfo cai, int index) {
XMLNode classAttributeXml = node.createNode(XmlTags.TAG_ATTRIBUTE);
classAttributeXml.addAttribute(XmlTags.ATTRIBUTE_ID, String.valueOf(cai.getId()));
classAttributeXml.addAttribute(XmlTags.ATTRIBUTE_NAME, cai.getName());
classAttributeXml.addAttribute(XmlTags.ATTRIBUTE_TYPE, cai.getAttributeType().getName());
if (cai.getAttributeType().isArray()) {
classAttributeXml.addAttribute(XmlTags.ATTRIBUTE_ARRAY_OF, cai.getAttributeType().getSubType().getName());
}
if (cai.getAttributeType().isEnum()) {
classAttributeXml.addAttribute(XmlTags.ATTRIBUTE_IS_ENUM, "true");
}
classAttributeXml.end();
}
public void logToConsole() {
this.externalLogger = new ConsoleLogger();
}
public void setExternalLogger(ILogger logger) {
this.externalLogger = logger;
}
protected void info(Object o) {
if (externalLogger != null) {
externalLogger.info(o);
}
}
}
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