/*
* 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.Arrays;
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.OClassImpl;
import com.orientechnologies.orient.core.metadata.schema.OProperty;
import com.orientechnologies.orient.core.metadata.schema.OProperty.ATTRIBUTES;
import com.orientechnologies.orient.core.metadata.schema.OPropertyImpl;
import com.orientechnologies.orient.core.metadata.security.ODatabaseSecurityResources;
import com.orientechnologies.orient.core.metadata.security.ORole;
/**
* SQL ALTER PROPERTY command: Changes an attribute of an existent property in the target class.
*
* @author Luca Garulli
*
*/
@SuppressWarnings("unchecked")
public class OCommandExecutorSQLAlterProperty extends OCommandExecutorSQLPermissionAbstract {
public static final String KEYWORD_ALTER = "ALTER";
public static final String KEYWORD_PROPERTY = "PROPERTY";
private String className;
private String fieldName;
private ATTRIBUTES attribute;
private String value;
public OCommandExecutorSQLAlterProperty parse(final OCommandRequestText iRequest) {
iRequest.getDatabase().checkSecurity(ODatabaseSecurityResources.COMMAND, ORole.PERMISSION_UPDATE);
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_ALTER))
throw new OCommandSQLParsingException("Keyword " + KEYWORD_ALTER + " 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 the property's attribute to change", text, oldPos);
final String attributeAsString = word.toString();
try {
attribute = OProperty.ATTRIBUTES.valueOf(attributeAsString.toUpperCase());
} catch (IllegalArgumentException e) {
throw new OCommandSQLParsingException("Unknown property's attribute '" + attributeAsString + "'. Supported attributes are: "
+ Arrays.toString(OProperty.ATTRIBUTES.values()), text, oldPos);
}
value = text.substring(pos + 1).trim();
if (value.length() == 0)
throw new OCommandSQLParsingException("Missed the property's value to change for attribute '" + attribute + "'", text, oldPos);
return this;
}
/**
* Execute the ALTER PROPERTY.
*/
public Object execute(final Map<Object, Object> iArgs) {
if (attribute == 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");
final OPropertyImpl prop = (OPropertyImpl) sourceClass.getProperty(fieldName);
if (prop == null)
throw new OCommandExecutionException("Property '" + className + "." + fieldName + "' not exists");
prop.setInternal(attribute, value);
return null;
}
}