/*
* @(#)Base64BinaryAttribute.java
*
* Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistribution 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 Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
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* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
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*
* You acknowledge that this software is not designed or intended for use in
* the design, construction, operation or maintenance of any nuclear facility.
*/
package com.sun.xacml.attr;
import java.io.IOException;
import java.net.URI;
import java.util.Arrays;
import org.w3c.dom.Node;
import com.sun.xacml.ParsingException;
/**
* Representation of an xsi:base64Binary value. This class supports parsing xsi:base64Binary values.
* All objects of this class are immutable and all methods of the class are thread-safe.
*
* @since 1.0
* @author Steve Hanna
*/
public class Base64BinaryAttribute extends AttributeValue {
/**
* Official name of this type
*/
public static final String identifier = "http://www.w3.org/2001/XMLSchema#base64Binary";
/**
* URI version of name for this type
*/
private static final URI identifierURI = URI.create(identifier);
/**
* The actual binary value that this object represents.
*/
private byte[] value;
/**
* The value returned by toString(). Cached, but only generated if needed.
*/
private String strValue;
/**
* Creates a new <code>Base64BinaryAttribute</code> that represents the byte [] value supplied.
*
* @param value
* the <code>byte []</code> value to be represented
*/
public Base64BinaryAttribute(byte[] value) {
super(identifierURI);
// This will throw a NullPointerException if value == null.
// That's what we want in that case.
this.value = (byte[]) value.clone();
}
/**
* Returns a new <code>Base64BinaryAttribute</code> that represents the xsi:base64Binary at a
* particular DOM node.
*
* @param root
* the <code>Node</code> that contains the desired value
* @return a new <code>Base64BinaryAttribute</code> representing the appropriate value
* @exception ParsingException
* if a parsing error occurs
*/
public static Base64BinaryAttribute getInstance(Node root) throws ParsingException {
return getInstance(root.getFirstChild().getNodeValue());
}
/**
* Returns a new <code>Base64BinaryAttribute</code> that represents the xsi:base64Binary value
* indicated by the string provided.
*
* @param value
* a string representing the desired value
* @return a new <code>Base64BinaryAttribute</code> representing the desired value
* @exception ParsingException
* if a parsing error occurs
*/
public static Base64BinaryAttribute getInstance(String value) throws ParsingException {
byte[] bytes = null;
try {
bytes = Base64.decode(value, false);
} catch (IOException e) {
throw new ParsingException("Couldn't parse purported " + "Base64 string: " + value, e);
}
return new Base64BinaryAttribute(bytes);
}
/**
* Returns the <code>byte []</code> value represented by this object. Note that this value is
* cloned before returning to prevent unauthorized modifications.
*
* @return the <code>byte []</code> value
*/
public byte[] getValue() {
return (byte[]) value.clone();
}
/**
* Returns true if the input is an instance of this class and if its value equals the value
* contained in this class.
*
* @param o
* the object to compare
*
* @return true if this object and the input represent the same value
*/
public boolean equals(Object o) {
if (!(o instanceof Base64BinaryAttribute))
return false;
Base64BinaryAttribute other = (Base64BinaryAttribute) o;
return Arrays.equals(value, other.value);
}
/**
* Returns the hashcode value used to index and compare this object with others of the same
* type. Typically this is the hashcode of the backing data object.
*
* @return the object's hashcode value
*/
public int hashCode() {
int code = (int) (value[0]);
for (int i = 1; i < value.length; i++) {
code *= 31;
code += (int) (value[i]);
}
return code;
}
/**
* Make the String representation of this object.
*
* @return the String representation
*/
private String makeStringRep() {
return Base64.encode(value);
}
/**
* Returns a String representation.
*
* @return the String representation
*/
public String toString() {
if (strValue == null)
strValue = makeStringRep();
return "Base64BinaryAttribute: [\n" + strValue + "]\n";
}
/**
*
*/
public String encode() {
if (strValue == null)
strValue = makeStringRep();
return strValue;
}
}