/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008-2014, Open Source Geospatial Foundation (OSGeo)
*
* This library 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.data.wfs;
import static org.geotools.data.wfs.internal.Loggers.trace;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.namespace.QName;
import org.geotools.data.Diff;
import org.geotools.data.Transaction;
import org.geotools.data.Transaction.State;
import org.geotools.data.wfs.WFSDiff.BatchUpdate;
import org.geotools.data.wfs.internal.TransactionRequest;
import org.geotools.data.wfs.internal.TransactionRequest.Delete;
import org.geotools.data.wfs.internal.TransactionRequest.Insert;
import org.geotools.data.wfs.internal.TransactionRequest.Update;
import org.geotools.data.wfs.internal.TransactionResponse;
import org.geotools.data.wfs.internal.WFSClient;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.opengis.feature.Property;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.Name;
import org.opengis.filter.Filter;
import org.opengis.filter.FilterFactory;
import org.opengis.filter.identity.FeatureId;
import org.opengis.filter.identity.Identifier;
class WFSRemoteTransactionState implements State {
private final WFSDataStore dataStore;
private Transaction transaction;
private Map<Name, WFSContentState> localStates;
public WFSRemoteTransactionState(WFSDataStore dataStore) {
this.dataStore = dataStore;
this.localStates = new HashMap<Name, WFSContentState>();
}
public synchronized WFSDiff getDiff(final Name typeName) {
WFSContentState localState = localStates.get(typeName);
if (null == localState) {
throw new IllegalStateException("Not watching " + typeName);
}
WFSDiff diff = localState.getLocalTransactionState().getDiff();
return diff;
}
@Override
public void setTransaction(Transaction transaction) {
this.transaction = transaction;
}
@Override
public void rollback() throws IOException {
clear(); // rollback differences
}
@Override
public void addAuthorization(String AuthID) throws IOException {
// not needed?
}
@Override
public synchronized void commit() throws IOException {
try {
commitInternal();
} finally {
// If the commit fails or succeeds, state is reset
clear();
}
}
/**
* This state takes ownership of each type's diff, so lets clear them all
*/
private void clear() {
for (WFSContentState localState : localStates.values()) {
WFSLocalTransactionState localTransactionState = localState.getLocalTransactionState();
WFSDiff diff = localTransactionState.getDiff();
diff.clear();
}
}
private void commitInternal() throws IOException {
if (this.localStates.isEmpty()) {
return;
}
WFSClient wfs = dataStore.getWfsClient();
TransactionRequest transactionRequest = wfs.createTransaction();
List<MutableFeatureId> requestedInsertFids = new ArrayList<MutableFeatureId>();
for (Name typeName : localStates.keySet()) {
List<MutableFeatureId> addedFids = applyDiff(typeName, transactionRequest);
requestedInsertFids.addAll(addedFids);
}
TransactionResponse transactionResponse = wfs.issueTransaction(transactionRequest);
List<FeatureId> insertedFids = transactionResponse.getInsertedFids();
int deleteCount = transactionResponse.getDeleteCount();
int updatedCount = transactionResponse.getUpdatedCount();
trace(getClass().getSimpleName(), "::commit(): Updated: ", updatedCount, ", Deleted: ",
deleteCount, ", Inserted: ", insertedFids);
if (requestedInsertFids.size() != insertedFids.size()) {
throw new IllegalStateException("Asked to add " + requestedInsertFids.size()
+ " Features but got " + insertedFids.size() + " insert results");
}
for (int i = 0; i < requestedInsertFids.size(); i++) {
MutableFeatureId local = requestedInsertFids.get(i);
FeatureId inserted = insertedFids.get(i);
local.setID(inserted.getID());
local.setFeatureVersion(inserted.getFeatureVersion());
}
}
private List<MutableFeatureId> applyDiff(final Name localTypeName,
TransactionRequest transactionRequest) throws IOException {
final WFSContentState localState = localStates.get(localTypeName);
final WFSLocalTransactionState localTransactionState = localState
.getLocalTransactionState();
final WFSDiff diff = localTransactionState.getDiff();
List<MutableFeatureId> addedFeatureIds = new LinkedList<MutableFeatureId>();
final QName remoteTypeName = dataStore.getRemoteTypeName(localTypeName);
applyBatchUpdates(remoteTypeName, diff, transactionRequest);
final Set<String> ignored = diff.getBatchModified();
final SimpleFeatureType remoteType = dataStore.getRemoteSimpleFeatureType(remoteTypeName);
// Create a single insert element with all the inserts for this type
final Map<String, SimpleFeature> added = diff.getAdded();
if (added.size() > 0) {
Insert insert = transactionRequest.createInsert(remoteTypeName);
SimpleFeatureBuilder builder = new SimpleFeatureBuilder(remoteType);
for (String fid : diff.getAddedOrder()) {
if (ignored.contains(fid)) {
continue;
}
SimpleFeature localFeature = added.get(fid);
MutableFeatureId addedFid = (MutableFeatureId) localFeature.getIdentifier();
addedFeatureIds.add(addedFid);
SimpleFeature remoteFeature = SimpleFeatureBuilder.retype(localFeature, builder);
insert.add(remoteFeature);
}
transactionRequest.add(insert);
}
final Map<String, SimpleFeature> modified = diff.getModified();
// Create a single delete element with all the deletes for this type
Set<Identifier> ids = new LinkedHashSet<Identifier>();
for (Map.Entry<String, SimpleFeature> entry : modified.entrySet()) {
if (!(Diff.NULL == entry.getValue())) {
continue;// not a delete
}
String rid = entry.getKey();
if (ignored.contains(rid)) {
continue;
}
Identifier featureId = featureId(rid);
ids.add(featureId);
}
if (!ids.isEmpty()) {
Filter deleteFilter = dataStore.getFilterFactory().id(ids);
Delete delete = transactionRequest.createDelete(remoteTypeName, deleteFilter);
transactionRequest.add(delete);
}
// Create one update element per modified feature. Batch modified ones should have been
// added as a single update element at applyBatchUpdate before
for (Map.Entry<String, SimpleFeature> entry : modified.entrySet()) {
String fid = entry.getKey();
SimpleFeature feature = entry.getValue();
if (Diff.NULL == feature) {
continue;// not an update
}
if (ignored.contains(fid)) {
continue;
}
applySingleUpdate(remoteTypeName, feature, transactionRequest);
}
return addedFeatureIds;
}
private void applySingleUpdate(QName remoteTypeName, SimpleFeature feature,
TransactionRequest transactionRequest) throws IOException {
// so bad, this is going to update a lot of unnecessary properties. We'd need to make
// DiffContentFeatureWriter's live and current attributes protected and extend write so that
// it records the truly modified attributes instead
Collection<Property> properties = feature.getProperties();
List<QName> propertyNames = new ArrayList<QName>();
List<Object> newValues = new ArrayList<Object>();
for (Property p : properties) {
QName attName = new QName(remoteTypeName.getNamespaceURI(), p.getName().getLocalPart());
Object attValue = p.getValue();
propertyNames.add(attName);
newValues.add(attValue);
}
Filter updateFilter = dataStore.getFilterFactory().id(
Collections.singleton(feature.getIdentifier()));
Update update = transactionRequest.createUpdate(remoteTypeName, propertyNames, newValues,
updateFilter);
transactionRequest.add(update);
}
private void applyBatchUpdates(QName remoteTypeName, WFSDiff diff,
TransactionRequest transactionRequest) {
List<BatchUpdate> batchUpdates = diff.getBatchUpdates();
for (BatchUpdate batch : batchUpdates) {
List<QName> propertyNames = new ArrayList<QName>(batch.properties.length);
for (Name attName : batch.properties) {
propertyNames.add(new QName(remoteTypeName.getNamespaceURI(), attName
.getLocalPart()));
}
List<Object> newValues = Arrays.asList(batch.values);
Filter updateFilter = batch.filter;
Update update = transactionRequest.createUpdate(remoteTypeName, propertyNames,
newValues, updateFilter);
transactionRequest.add(update);
}
}
private Identifier featureId(final String rid) {
final FilterFactory ff = dataStore.getFilterFactory();
String fid = rid;
String featureVersion = null;
int versionSeparatorIdx = rid.indexOf(FeatureId.VERSION_SEPARATOR);
if (-1 != versionSeparatorIdx) {
fid = rid.substring(0, versionSeparatorIdx);
featureVersion = rid.substring(versionSeparatorIdx + 1);
}
FeatureId featureId = ff.featureId(fid, featureVersion);
return featureId;
}
public void watch(WFSContentState localState) {
Name typeName = localState.getEntry().getName();
localStates.put(typeName, localState);
}
}