/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program 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 distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.connection;
import java.util.List;
import org.apache.metamodel.json.JsonDataContext;
import org.apache.metamodel.schema.builder.SchemaBuilder;
import org.apache.metamodel.util.Resource;
import org.apache.metamodel.util.SerializableRef;
/**
* Datastore implementation for JSON files
*/
public class JsonDatastore extends UsageAwareDatastore<JsonDataContext> implements ResourceDatastore {
private static final long serialVersionUID = 1L;
private final SerializableRef<Resource> _resourceRef;
private final SerializableRef<SchemaBuilder> _schemaBuilderRef;
public JsonDatastore(final String name, final Resource resource) {
this(name, resource, null);
}
public JsonDatastore(final String name, final Resource resource, final SchemaBuilder schemaBuilder) {
super(name);
_resourceRef = new SerializableRef<>(resource);
_schemaBuilderRef = new SerializableRef<>(schemaBuilder);
}
@Override
public PerformanceCharacteristics getPerformanceCharacteristics() {
return new PerformanceCharacteristicsImpl(false, true);
}
@Override
protected UsageAwareDatastoreConnection<JsonDataContext> createDatastoreConnection() {
final Resource resource = _resourceRef.get();
final JsonDataContext dataContext;
final SchemaBuilder schemaBuilder = _schemaBuilderRef.get();
if (schemaBuilder == null) {
dataContext = new JsonDataContext(resource);
} else {
dataContext = new JsonDataContext(resource, schemaBuilder);
}
return new DatastoreConnectionImpl<>(dataContext, this);
}
public SchemaBuilder getSchemaBuilder() {
return _schemaBuilderRef.get();
}
@Override
public Resource getResource() {
return _resourceRef.get();
}
@Override
protected void decorateIdentity(final List<Object> identifiers) {
super.decorateIdentity(identifiers);
identifiers.add(_resourceRef);
}
}