/*
*
* * 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.io.IOException;
import java.util.Arrays;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
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.ODatabaseRecord;
import com.orientechnologies.orient.core.db.record.ODatabaseRecordInternal;
import com.orientechnologies.orient.core.exception.OCommandExecutionException;
import com.orientechnologies.orient.core.metadata.security.ODatabaseSecurityResources;
import com.orientechnologies.orient.core.metadata.security.ORole;
import com.orientechnologies.orient.core.storage.OCluster;
import com.orientechnologies.orient.core.storage.OCluster.ATTRIBUTES;
import com.orientechnologies.orient.core.storage.OStorage;
import com.orientechnologies.orient.core.storage.impl.local.paginated.OLocalPaginatedStorage;
/**
* SQL ALTER PROPERTY command: Changes an attribute of an existent property in the target class.
*
* @author Luca Garulli
*
*/
@SuppressWarnings("unchecked")
public class OCommandExecutorSQLAlterCluster extends OCommandExecutorSQLAbstract implements OCommandDistributedReplicateRequest {
public static final String KEYWORD_ALTER = "ALTER";
public static final String KEYWORD_CLUSTER = "CLUSTER";
protected String clusterName;
protected int clusterId = -1;
protected ATTRIBUTES attribute;
protected String value;
public OCommandExecutorSQLAlterCluster parse(final OCommandRequest iRequest) {
final ODatabaseRecord database = getDatabase();
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_ALTER))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_ALTER + " not found. Use " + getSyntax(), parserText, oldPos);
oldPos = pos;
pos = nextWord(parserText, parserTextUpperCase, oldPos, word, true);
if (pos == -1 || !word.toString().equals(KEYWORD_CLUSTER))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_CLUSTER + " not found. Use " + getSyntax(), parserText, oldPos);
oldPos = pos;
pos = nextWord(parserText, parserTextUpperCase, oldPos, word, false);
if (pos == -1)
throw new OCommandSQLParsingException("Expected <cluster-name>. Use " + getSyntax(), parserText, oldPos);
clusterName = word.toString();
final Pattern p = Pattern.compile("([0-9]*)");
final Matcher m = p.matcher(clusterName);
if (m.matches())
clusterId = Integer.parseInt(clusterName);
oldPos = pos;
pos = nextWord(parserText, parserTextUpperCase, oldPos, word, true);
if (pos == -1)
throw new OCommandSQLParsingException("Missing cluster attribute to change. Use " + getSyntax(), parserText, oldPos);
final String attributeAsString = word.toString();
try {
attribute = OCluster.ATTRIBUTES.valueOf(attributeAsString.toUpperCase(Locale.ENGLISH));
} catch (IllegalArgumentException e) {
throw new OCommandSQLParsingException("Unknown class attribute '" + attributeAsString + "'. Supported attributes are: "
+ Arrays.toString(OCluster.ATTRIBUTES.values()), parserText, oldPos);
}
value = parserText.substring(pos + 1).trim();
if (value.length() == 0)
throw new OCommandSQLParsingException("Missing property value to change for attribute '" + attribute + "'. Use "
+ getSyntax(), parserText, oldPos);
if (value.equalsIgnoreCase("null"))
value = null;
return this;
}
/**
* Execute the ALTER CLASS.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (attribute == null)
throw new OCommandExecutionException("Cannot execute the command because it has not been parsed yet");
final OCluster cluster = getCluster();
if (cluster == null)
throw new OCommandExecutionException("Cluster '" + clusterName + "' not found");
if (clusterId > -1 && clusterName.equals(String.valueOf(clusterId))) {
clusterName = cluster.getName();
} else {
clusterId = cluster.getId();
}
try {
cluster.set(attribute, value);
final OStorage storage = getDatabase().getStorage();
if (storage instanceof OLocalPaginatedStorage)
((OLocalPaginatedStorage) storage).makeFullCheckpoint();
} catch (IOException ioe) {
throw new OCommandExecutionException("Error altering cluster '" + clusterName + "'", ioe);
}
return null;
}
protected OCluster getCluster() {
final ODatabaseRecordInternal database = getDatabase();
if (clusterId > -1) {
return database.getStorage().getClusterById(clusterId);
} else {
return database.getStorage().getClusterById(database.getStorage().getClusterIdByName(clusterName));
}
}
public String getSyntax() {
return "ALTER CLUSTER <cluster-name>|<cluster-id> <attribute-name> <attribute-value>";
}
}