/*
* 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.directory.studio.ldifparser;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
/**
* Utilities for LDAP related encoding and decoding.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class LdifUtils
{
/**
* Encodes the given string to UTF-8
*
* @param s the string to encode
*
* @return the byte[] the encoded value
*/
public static byte[] utf8encode( String s )
{
try
{
return s.getBytes( "UTF-8" ); //$NON-NLS-1$
}
catch ( UnsupportedEncodingException e )
{
return s.getBytes();
}
}
/**
* Encodes the given string into URL format.
*
* @param s the string to encode
*
* @return the string the URL encoded string
*/
public static String urlEncode( String s )
{
try
{
return URLEncoder.encode( s, "UTF-8" ); //$NON-NLS-1$
}
catch ( UnsupportedEncodingException e )
{
return s;
}
}
/**
* Encodes the given byte array using BASE-64 encoding.
*
* @param b the b the byte array to encode
*
* @return the BASE-64 encoded string
*/
public static String base64encode( byte[] b )
{
return utf8decode( Base64.encodeBase64( b ) );
}
/**
* Encodes the given byte array to a sequence of
* its hex values.
*
* @param data the data to encode
* @return the HEX encoded string
*/
public static String hexEncode( byte[] data )
{
if ( data == null )
{
return null;
}
char[] c = Hex.encodeHex( data );
String s = new String( c );
return s;
}
/**
* Decodes the given UTF-8 byte array to an string.
*
* @param b the b the byte array to decode
*
* @return the decoded string
*/
public static String utf8decode( byte[] b )
{
try
{
return new String( b, "UTF-8" ); //$NON-NLS-1$
}
catch ( UnsupportedEncodingException e )
{
return new String( b );
}
}
/**
* Decodes the given BASE-64 encoded string to its
* bytes presentation.
*
* @param s the s the BASE-64 encoded string
*
* @return the byte[] the decoded byte array
*/
public static byte[] base64decodeToByteArray( String s )
{
return Base64.decodeBase64( utf8encode( s ) );
}
/**
* Checks if the given distinguished name must be encoded.
*
* @param dn the dn to check
*
* @return true, if must encode Dn
*/
public static boolean mustEncodeDN( String dn )
{
return mustEncode( dn );
}
/**
* Checks if the given string must be encoded to be
* used in an LDIF.
*
* @param value the value to check
*
* @return true, if must encode
*/
public static boolean mustEncode( String value )
{
if ( ( value == null ) || ( value.length() < 1 ) )
{
return false;
}
if ( value.startsWith( " " ) || value.startsWith( ":" ) || value.startsWith( "<" ) ) //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
{
return true;
}
if ( value.endsWith( " " ) ) //$NON-NLS-1$
{
return true;
}
for ( int i = 0; i < value.length(); i++ )
{
if ( ( value.charAt( i ) == '\r' ) || ( value.charAt( i ) == '\n' ) || ( value.charAt( i ) == '\u0000' )
|| ( value.charAt( i ) > '\u007F' ) )
{
return true;
}
}
return false;
}
/**
* Convert all the '\n' and '\r' to a String
* @param s The String to be converted
* @return The resulting String
*/
public static String convertNlRcToString( String s )
{
if ( s == null )
{
return "";
}
// Worth case, the new string is three times bigger
char[] result = new char[s.length() * 3];
int pos = 0;
for ( char c : s.toCharArray() )
{
if ( c == '\n' )
{
result[pos++] = '\\';
result[pos++] = 'n';
}
else if ( c == '\r' )
{
result[pos++] = '\\';
result[pos++] = 'r';
}
else
{
result[pos++] = c;
}
}
return new String( result, 0, pos );
}
}