/*
* Copyright 1999-2010 Luca Garulli (l.garulli--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.
*/
package com.orientechnologies.orient.core.sql;
import java.util.Map;
import com.orientechnologies.orient.core.command.OCommandRequestText;
import com.orientechnologies.orient.core.exception.OCommandExecutionException;
import com.orientechnologies.orient.core.metadata.schema.OClass;
import com.orientechnologies.orient.core.metadata.schema.OClassImpl;
import com.orientechnologies.orient.core.metadata.schema.OSchemaProxy;
import com.orientechnologies.orient.core.metadata.security.ODatabaseSecurityResources;
import com.orientechnologies.orient.core.metadata.security.ORole;
/**
* SQL CREATE PROPERTY command: Creates a new property in the target class.
*
* @author Luca Garulli
*
*/
@SuppressWarnings("unchecked")
public class OCommandExecutorSQLCreateClass extends OCommandExecutorSQLPermissionAbstract {
public static final String KEYWORD_CREATE = "CREATE";
public static final String KEYWORD_CLASS = "CLASS";
public static final String KEYWORD_EXTENDS = "EXTENDS";
private String className;
private OClass superClass;
private int[] clusterIds;
public OCommandExecutorSQLCreateClass parse(final OCommandRequestText iRequest) {
iRequest.getDatabase().checkSecurity(ODatabaseSecurityResources.COMMAND, ORole.PERMISSION_CREATE);
init(iRequest.getDatabase(), iRequest.getText());
StringBuilder word = new StringBuilder();
int oldPos = 0;
int pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, true);
if (pos == -1 || !word.toString().equals(KEYWORD_CREATE))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_CREATE + " not found", text, oldPos);
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, true);
if (pos == -1 || !word.toString().equals(KEYWORD_CLASS))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_CLASS + " not found", text, oldPos);
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, false);
if (pos == -1)
throw new OCommandSQLParsingException("Expected <class>", text, oldPos);
className = word.toString();
if (className == null)
throw new OCommandSQLParsingException("Class " + className + " already exists", text, oldPos);
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, true);
if (pos > -1) {
if (word.toString().equals(KEYWORD_EXTENDS)) {
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, false);
if (pos == -1)
throw new OCommandSQLParsingException("Syntax error after EXTENDS for class " + className
+ ". Expected the super-class name ", text, oldPos);
if (!database.getMetadata().getSchema().existsClass(word.toString()))
throw new OCommandSQLParsingException("Super-class " + word + " not exists", text, oldPos);
superClass = database.getMetadata().getSchema().getClass(word.toString());
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, false);
}
if (pos > -1) {
final String[] clusterIdsAsStrings = word.toString().split(",");
if (clusterIdsAsStrings.length > 0) {
clusterIds = new int[clusterIdsAsStrings.length];
for (int i = 0; i < clusterIdsAsStrings.length; ++i) {
clusterIds[i] = Integer.parseInt(clusterIdsAsStrings[i]);
if (database.getStorage().getClusterById(clusterIds[i]) == null)
throw new OCommandSQLParsingException("Cluster with id " + clusterIds[i] + " doesn't exists", text, oldPos);
}
}
} else {
final int clusterId = database.getStorage().getClusterIdByName(className);
if (clusterId > -1) {
clusterIds = new int[] { clusterId };
}
}
} else {
final int clusterId = database.getStorage().getClusterIdByName(className);
if (clusterId > -1) {
clusterIds = new int[] { clusterId };
}
}
return this;
}
/**
* Execute the CREATE CLASS.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (className == null)
throw new OCommandExecutionException("Can't execute the command because it hasn't been parsed yet");
if (database.getMetadata().getSchema().existsClass(className))
throw new OCommandExecutionException("Class " + className + " already exists");
final OClassImpl sourceClass = (OClassImpl) ((OSchemaProxy) database.getMetadata().getSchema()).createClassInternal(className,
superClass, clusterIds);
sourceClass.saveInternal();
return database.getMetadata().getSchema().getClasses().size();
}
}