org.geotools.data.DefaultRepository Maven / Gradle / Ivy
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/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2003-2008, 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;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.Serializable;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.feature.NameImpl;
import org.opengis.feature.type.Name;
/**
* Default Repository implementation allows GeoTools to manage your DataStores.
*
* To use this implementation you can "registery" new DataStores:
*
*
* - load( File )
*
- This also serves as a reminder that we need CrossDataStore functionality - at least for
* Locks. And possibly for "Query".
*
* @author Jody Garnett DefaultRepository.java $
*/
public class DefaultRepository implements Repository {
/** Holds the DataStores so we can clean up when closed */
protected Map
> repository = new ConcurrentHashMap<>();
//
// lookup methods provided by Repository interface
//
public DataAccess access(String name) {
return access(new NameImpl(name));
}
public DataAccess access(Name name) {
return repository.get(name);
}
public DataStore dataStore(String name) {
return (DataStore) access(name);
}
public DataStore dataStore(Name name) {
return (DataStore) access(name);
}
//
// DefaultRepository methods used to maintain datastores
//
/**
* Load a quick repository from a properties file.
*
* This is useful for test cases; the format is:
*
*
* nameA=param=value,param2=value2,...
* nameB=param=value,param2=value2,...
*
*/
public void load(File propertiesFile) throws Exception {
Properties properties = new Properties();
properties.load(new FileInputStream(propertiesFile));
for (Iterator i = properties.entrySet().iterator(); i.hasNext(); ) {
Map.Entry entry = (Map.Entry) i.next();
String name = (String) entry.getKey();
String definition = (String) entry.getValue();
Map params = definition(definition);
DataStore dataStore = DataStoreFinder.getDataStore(params);
register(name, dataStore);
}
}
/** Check if a lock exists in any of the DataStores. */
public boolean lockExists(String lockID) {
if (lockID == null) {
return false;
}
LockingManager lockManager;
for (DataAccess access : repository.values()) {
DataStore store = (DataStore) access;
lockManager = store.getLockingManager();
if (lockManager == null) {
continue; // did not support locking
}
if (lockManager.exists(lockID)) {
return true;
}
}
return false;
}
/**
* Implement lockRefresh.
*
* Currently it is an error if the lockID is not found. Because if we can't find it we cannot
* refresh it.
*
*
Since locks are time sensitive it is impossible to check if a lockExists and then be sure
* it will still exist when you try to refresh it. Nothing we do can protect client code from
* this fact, they will need to do with the IOException when (not if) this situation occurs.
*
* @see org.geotools.data.Catalog#lockRefresh(java.lang.String, org.geotools.data.Transaction)
* @param lockID Authorizataion of lock to refresh
* @param transaction Transaction used to authorize refresh
* @throws IOException If opperation encounters problems, or lock not found
* @throws IllegalArgumentException if lockID is null
*/
public boolean lockRefresh(String lockID, Transaction transaction) throws IOException {
if (lockID == null) {
throw new IllegalArgumentException("lockID required");
}
if (transaction == null || transaction == Transaction.AUTO_COMMIT) {
throw new IllegalArgumentException(
"Tansaction required (with authorization for " + lockID + ")");
}
LockingManager lockManager;
boolean refresh = false;
for (DataAccess access : repository.values()) {
DataStore store = (DataStore) access;
lockManager = store.getLockingManager();
if (lockManager == null) {
continue; // did not support locking
}
if (lockManager.release(lockID, transaction)) {
refresh = true;
}
}
return refresh;
}
/**
* Implement lockRelease.
*
*
Currently it is not and error if the lockID is not found, it may have expired.
* Since locks are time sensitive it is impossible to check if a lockExists and then be sure it
* will still exist when you try to release it.
*
* @see org.geotools.data.Catalog#lockRefresh(java.lang.String, org.geotools.data.Transaction)
* @param lockID Authorizataion of lock to refresh
* @param transaction Transaction used to authorize refresh
* @throws IOException If opperation encounters problems
* @throws IllegalArgumentException if lockID is null
*/
public boolean lockRelease(String lockID, Transaction transaction) throws IOException {
if (lockID == null) {
throw new IllegalArgumentException("lockID required");
}
if (transaction == null || transaction == Transaction.AUTO_COMMIT) {
throw new IllegalArgumentException(
"Tansaction required (with authorization for " + lockID + ")");
}
LockingManager lockManager;
boolean release = false;
for (DataAccess access : repository.values()) {
DataStore store = (DataStore) access;
lockManager = store.getLockingManager();
if (lockManager == null) continue; // did not support locking
if (lockManager.release(lockID, transaction)) {
release = true;
}
}
return release;
}
/**
* Register a new DataStore with this registery
*
*
Description ...
*
* @see org.geotools.data.Catalog#registerDataStore(org.geotools.data.DataStore)
*/
public void register(String name, DataAccess dataStore) throws IOException {
register(new NameImpl(name), dataStore);
}
public void register(Name name, DataAccess dataStore) throws IOException {
if (repository.containsKey(name)) {
throw new IOException("Name " + name + " already registered");
}
if (repository.containsValue(dataStore)) {
throw new IOException("The dataStore already registered");
}
repository.put(name, dataStore);
}
public DataStore datastore(String id) {
return dataStore(new NameImpl(id));
}
public SimpleFeatureSource source(String dataStoreId, String typeName) throws IOException {
DataStore ds = datastore(dataStoreId);
return ds.getFeatureSource(typeName);
}
/** Internal method parsing parameters from a string */
private static final Map definition(String definition)
throws ParseException {
Map map = new HashMap();
String[] params = definition.split(",");
int offset = 0;
for (int i = 0; i < params.length; i++) {
String[] vals = params[i].split("=");
if (vals.length == 2) {
map.put(vals[0].trim(), vals[1].trim());
} else {
throw new ParseException("Could not interpret " + params[i], offset);
}
offset += params[i].length();
}
return map;
}
@SuppressWarnings("unchecked")
public Set getNames() {
Set names = new HashSet(repository.keySet());
return (Set) names;
}
@SuppressWarnings("unchecked")
public List getDataStores() {
List list = new ArrayList(repository.values());
return (List) list;
}
}