/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.core.sql;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import com.orientechnologies.orient.core.command.OCommandDistributedReplicateRequest;
import com.orientechnologies.orient.core.command.OCommandRequest;
import com.orientechnologies.orient.core.command.OCommandRequestText;
import com.orientechnologies.orient.core.db.record.ODatabaseRecordInternal;
import com.orientechnologies.orient.core.exception.OCommandExecutionException;
import com.orientechnologies.orient.core.id.ORecordId;
import com.orientechnologies.orient.core.serialization.serializer.OStringSerializerHelper;
import com.orientechnologies.orient.core.version.OVersionFactory;
/**
* SQL TRUNCATE RECORD command: Truncates a record without loading it. Useful when the record is dirty in any way and cannot be
* loaded correctly.
*
* @author Luca Garulli
*
*/
public class OCommandExecutorSQLTruncateRecord extends OCommandExecutorSQLAbstract implements OCommandDistributedReplicateRequest {
public static final String KEYWORD_TRUNCATE = "TRUNCATE";
public static final String KEYWORD_RECORD = "RECORD";
private Set<String> records = new HashSet<String>();
@SuppressWarnings("unchecked")
public OCommandExecutorSQLTruncateRecord parse(final OCommandRequest iRequest) {
init((OCommandRequestText) iRequest);
StringBuilder word = new StringBuilder();
int oldPos = 0;
int pos = nextWord(parserText, parserTextUpperCase, oldPos, word, true);
if (pos == -1 || !word.toString().equals(KEYWORD_TRUNCATE))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_TRUNCATE + " not found. Use " + getSyntax(), parserText, oldPos);
oldPos = pos;
pos = nextWord(parserText, parserTextUpperCase, oldPos, word, true);
if (pos == -1 || !word.toString().equals(KEYWORD_RECORD))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_RECORD + " not found. Use " + getSyntax(), parserText, oldPos);
oldPos = pos;
pos = nextWord(parserText, parserText, oldPos, word, true);
if (pos == -1)
throw new OCommandSQLParsingException("Expected one or more records. Use " + getSyntax(), parserText, oldPos);
if (word.charAt(0) == '[')
// COLLECTION
OStringSerializerHelper.getCollection(parserText, oldPos, records);
else {
records.add(word.toString());
}
if (records.isEmpty())
throw new OCommandSQLParsingException("Missed record(s). Use " + getSyntax(), parserText, oldPos);
return this;
}
/**
* Execute the command.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (records.isEmpty())
throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");
final ODatabaseRecordInternal database = getDatabase();
for (String rec : records) {
try {
final ORecordId rid = new ORecordId(rec);
database.getStorage().deleteRecord(rid, OVersionFactory.instance().createUntrackedVersion(), 0, null);
database.getLocalCache().deleteRecord(rid);
} catch (Throwable e) {
throw new OCommandExecutionException("Error on executing command", e);
}
}
return records.size();
}
@Override
public String getSyntax() {
return "TRUNCATE RECORD <rid>*";
}
}