package org.apache.cassandra.cli;
/*
*
* 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.
*
*/
public class CliUtils
{
/*
* Strips leading and trailing "'" characters, and handles
* and escaped characters such as \n, \r, etc.
* [Shameless clone from hive.]
*/
public static String unescapeSQLString(String b)
{
assert(b.charAt(0) == '\'');
assert(b.charAt(b.length()-1) == '\'');
StringBuilder sb = new StringBuilder(b.length());
for (int i=1; i+1<b.length(); i++)
{
if (b.charAt(i) == '\\' && i+2<b.length())
{
char n=b.charAt(i+1);
switch(n)
{
case '0': sb.append("\0"); break;
case '\'': sb.append("'"); break;
case '"': sb.append("\""); break;
case 'b': sb.append("\b"); break;
case 'n': sb.append("\n"); break;
case 'r': sb.append("\r"); break;
case 't': sb.append("\t"); break;
case 'Z': sb.append("\u001A"); break;
case '\\': sb.append("\\"); break;
case '%': sb.append("%"); break;
case '_': sb.append("_"); break;
default: sb.append(n);
}
}
else
{
sb.append(b.charAt(i));
}
}
return sb.toString();
}
}