org.apache.hudi.org.apache.hadoop.hbase.security.visibility.CellVisibility Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.security.visibility;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.util.Bytes;
/**
* This contains a visibility expression which can be associated with a cell. When it is set with a
* Mutation, all the cells in that mutation will get associated with this expression. A visibility
* expression can contain visibility labels combined with logical
* operators AND(&), OR(|) and NOT(!)
*/
@InterfaceAudience.Public
public class CellVisibility {
private String expression;
public CellVisibility(String expression) {
this.expression = expression;
}
/**
* @return The visibility expression
*/
public String getExpression() {
return this.expression;
}
@Override
public String toString() {
return this.expression;
}
/**
* Helps in quoting authentication Strings. Use this if unicode characters to
* be used in expression or special characters like '(', ')',
* '"','\','&','|','!'
*/
public static String quote(String auth) {
return quote(Bytes.toBytes(auth));
}
/**
* Helps in quoting authentication Strings. Use this if unicode characters to
* be used in expression or special characters like '(', ')',
* '"','\','&','|','!'
*/
public static String quote(byte[] auth) {
int escapeChars = 0;
for (int i = 0; i < auth.length; i++)
if (auth[i] == '"' || auth[i] == '\\')
escapeChars++;
byte[] escapedAuth = new byte[auth.length + escapeChars + 2];
int index = 1;
for (int i = 0; i < auth.length; i++) {
if (auth[i] == '"' || auth[i] == '\\') {
escapedAuth[index++] = '\\';
}
escapedAuth[index++] = auth[i];
}
escapedAuth[0] = '"';
escapedAuth[escapedAuth.length - 1] = '"';
return Bytes.toString(escapedAuth);
}
}