org.openmdx.base.text.conversion.URITransformation Maven / Gradle / Ivy
/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: URI Transformation
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2009, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.base.text.conversion;
/**
* URI Transformation
*/
public class URITransformation {
/**
* Constructor
*/
private URITransformation() {
// Avoid instantiation
}
/**
* Convert a percent encoded ASCII string to an UTF-16 string
*
* @param source
*
* @return the decoded value
*/
public static String decode(
String source
){
if(source.indexOf('%') < 0) {
return source;
} else {
byte[] utf8 = new byte[source.length()];
int j = 0;
for(
int i = 0, iLimit = source.length();
i < iLimit;
i++
){
char c = source.charAt(i);
if(c == '%') {
utf8[j++] = (byte) (
0x10 * URITransformation.valueOfHexadecimalDigit(source.charAt(++i)) +
URITransformation.valueOfHexadecimalDigit(source.charAt(++i))
);
} else {
utf8[j++] = (byte) c;
}
}
return UnicodeTransformation.toString(utf8, 0, j);
}
}
/**
* Escape percent signs
*
* @param source the URI to be encoded
*
* @return the encoded URI
*/
public static String encode(
String source
){
return source.replaceAll("%", "%25");
}
/**
* Retrieve the value of an (upper or lower case) hexadecimal digit
*
* @param digit a hexadecimal digit
*
* @return the hexadecimal digit's value
*/
private final static int valueOfHexadecimalDigit(
char digit
){
return
digit >= '0' && digit <= '9' ? digit - '0' :
digit >= 'A' && digit <= 'Z' ? digit - 'A' + 10 :
digit >= 'a' && digit <= 'z' ? digit - 'a' + 10 :
-1; // invalid hexadecimal digit
}
}