/*
* 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.OPropertyImpl;
import com.orientechnologies.orient.core.metadata.schema.OType;
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 OCommandExecutorSQLCreateProperty extends OCommandExecutorSQLPermissionAbstract {
public static final String KEYWORD_CREATE = "CREATE";
public static final String KEYWORD_PROPERTY = "PROPERTY";
private String className;
private String fieldName;
private OType type;
private String linked;
public OCommandExecutorSQLCreateProperty 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_PROPERTY))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_PROPERTY + " not found", text, oldPos);
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, false);
if (pos == -1)
throw new OCommandSQLParsingException("Expected <class>.<property>", text, oldPos);
String[] parts = word.toString().split("\\.");
if (parts.length != 2)
throw new OCommandSQLParsingException("Expected <class>.<property>", text, oldPos);
className = parts[0];
if (className == null)
throw new OCommandSQLParsingException("Class not found", text, oldPos);
fieldName = parts[1];
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, true);
if (pos == -1)
throw new OCommandSQLParsingException("Missed property type", text, oldPos);
type = OType.valueOf(word.toString());
oldPos = pos;
pos = OSQLHelper.nextWord(text, textUpperCase, oldPos, word, false);
if (pos == -1)
return this;
linked = word.toString();
return this;
}
/**
* Execute the CREATE PROPERTY.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (type == null)
throw new OCommandExecutionException("Can't execute the command because it hasn't been parsed yet");
final OClassImpl sourceClass = (OClassImpl) database.getMetadata().getSchema().getClass(className);
if (sourceClass == null)
throw new OCommandExecutionException("Source class '" + className + "' not found");
OPropertyImpl prop = (OPropertyImpl) sourceClass.getProperty(fieldName);
if (prop != null)
throw new OCommandExecutionException("Property '" + className + "." + fieldName
+ "' already exists. Remove it before to retry.");
// CREATE THE PROPERTY
OClass linkedClass = null;
OType linkedType = null;
if (linked != null) {
// FIRST SEARCH BETWEEN CLASSES
linkedClass = database.getMetadata().getSchema().getClass(linked);
if (linkedClass == null)
// NOT FOUND: SEARCH BETWEEN TYPES
linkedType = OType.valueOf(linked.toUpperCase());
}
// CREATE IT LOCALLY
prop = sourceClass.addPropertyInternal(fieldName, type, linkedType, linkedClass);
sourceClass.saveInternal();
return sourceClass.properties().size();
}
}