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	/*
	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/


	package com.sun.jmx.snmp;

	import java.net.InetAddress;
	import java.net.UnknownHostException;

	/**
	* Represents an SNMP string.
	*
	* <p><b>This API is a Sun Microsystems internal API and is subject
	* to change without notice.</b></p>
	*/

	public class SnmpString extends SnmpValue {
	private static final long serialVersionUID = -7011986973225194188L;

	// CONSTRUCTORS
	//-------------
	/**
	* Constructs a new empty <CODE>SnmpString</CODE>.
	*/
	public SnmpString() {
	value = new byte[0] ;
	}

	/**
	* Constructs a new <CODE>SnmpString</CODE> from the specified bytes array.
	* @param v The bytes composing the string value.
	*/
	public SnmpString(byte[] v) {
	value = v.clone() ;
	}

	/**
	* Constructs a new <CODE>SnmpString</CODE> from the specified <CODE>Bytes</CODE> array.
	* @param v The <CODE>Bytes</CODE> composing the string value.
	*/
	public SnmpString(Byte[] v) {
	value = new byte[v.length] ;
	for (int i = 0 ; i < v.length ; i++) {
	value[i] = v[i].byteValue() ;
	}
	}

	/**
	* Constructs a new <CODE>SnmpString</CODE> from the specified <CODE>String</CODE> value.
	* @param v The initialization value.
	*/
	public SnmpString(String v) {
	value = v.getBytes() ;
	}

	/**
	* Constructs a new <CODE>SnmpString</CODE> from the specified <CODE> InetAddress </Code>.
	* @param address The <CODE>InetAddress </CODE>.
	*
	* @since 1.5
	*/
	public SnmpString(InetAddress address) {
	value = address.getAddress();
	}

	// PUBLIC METHODS
	//---------------

	/**
	* Converts the string value to its <CODE> InetAddress </CODE> form.
	* @return an {@link InetAddress} defined by the string value.
	* @exception UnknownHostException If string value is not a legal address format.
	*
	* @since 1.5
	*/
	public InetAddress inetAddressValue() throws UnknownHostException {
	return InetAddress.getByAddress(value);
	}

	/**
	* Converts the specified binary string into a character string.
	* @param bin The binary string value to convert.
	* @return The character string representation.
	*/
	public static String BinToChar(String bin) {
	char value[] = new char[bin.length()/8];
	int binLength = value.length;
	for (int i = 0; i < binLength; i++)
	value[i] = (char)Integer.parseInt(bin.substring(8i, 8i+8), 2);
	return new String(value);
	}

	/**
	* Converts the specified hexadecimal string into a character string.
	* @param hex The hexadecimal string value to convert.
	* @return The character string representation.
	*/
	public static String HexToChar(String hex) {
	char value[] = new char[hex.length()/2];
	int hexLength = value.length;
	for (int i = 0; i < hexLength; i++)
	value[i] = (char)Integer.parseInt(hex.substring(2i, 2i+2), 16);
	return new String(value);
	}

	/**
	* Returns the bytes array of this <CODE>SnmpString</CODE>.
	* @return The value.
	*/
	public byte[] byteValue() {
	return value.clone() ;
	}

	/**
	* Converts the string value to its array of <CODE>Bytes</CODE> form.
	* @return The array of <CODE>Bytes</CODE> representation of the value.
	*/
	public Byte[] toByte() {
	Byte[] result = new Byte[value.length] ;
	for (int i = 0 ; i < value.length ; i++) {
	result[i] = new Byte(value[i]) ;
	}
	return result ;
	}

	/**
	* Converts the string value to its <CODE>String</CODE> form.
	* @return The <CODE>String</CODE> representation of the value.
	*/
	public String toString() {
	return new String(value) ;
	}

	/**
	* Converts the string value to its <CODE>SnmpOid</CODE> form.
	* @return The OID representation of the value.
	*/
	public SnmpOid toOid() {
	long[] ids = new long[value.length] ;
	for (int i = 0 ; i < value.length ; i++) {
	ids[i] = (long)(value[i] & 0xFF) ;
	}
	return new SnmpOid(ids) ;
	}

	/**
	* Extracts the string from an index OID and returns its
	* value converted as an <CODE>SnmpOid</CODE>.
	* @param index The index array.
	* @param start The position in the index array.
	* @return The OID representing the string value.
	* @exception SnmpStatusException There is no string value
	* available at the start position.
	*/
	public static SnmpOid toOid(long[] index, int start) throws SnmpStatusException {
	try {
	if (index[start] > Integer.MAX_VALUE) {
	throw new SnmpStatusException(SnmpStatusException.noSuchName) ;
	}
	int strLen = (int)index[start++] ;
	long[] ids = new long[strLen] ;
	for (int i = 0 ; i < strLen ; i++) {
	ids[i] = index[start + i] ;
	}
	return new SnmpOid(ids) ;
	}
	catch(IndexOutOfBoundsException e) {
	throw new SnmpStatusException(SnmpStatusException.noSuchName) ;
	}
	}

	/**
	* Scans an index OID, skips the string value and returns the position
	* of the next value.
	* @param index The index array.
	* @param start The position in the index array.
	* @return The position of the next value.
	* @exception SnmpStatusException There is no string value
	* available at the start position.
	*/
	public static int nextOid(long[] index, int start) throws SnmpStatusException {
	try {
	if (index[start] > Integer.MAX_VALUE) {
	throw new SnmpStatusException(SnmpStatusException.noSuchName) ;
	}
	int strLen = (int)index[start++] ;
	start += strLen ;
	if (start <= index.length) {
	return start ;
	}
	else {
	throw new SnmpStatusException(SnmpStatusException.noSuchName) ;
	}
	}
	catch(IndexOutOfBoundsException e) {
	throw new SnmpStatusException(SnmpStatusException.noSuchName) ;
	}
	}

	/**
	* Appends an <CODE>SnmpOid</CODE> representing an <CODE>SnmpString</CODE> to another OID.
	* @param source An OID representing an <CODE>SnmpString</CODE> value.
	* @param dest Where source should be appended.
	*/
	public static void appendToOid(SnmpOid source, SnmpOid dest) {
	dest.append(source.getLength()) ;
	dest.append(source) ;
	}

	/**
	* Performs a clone action. This provides a workaround for the
	* <CODE>SnmpValue</CODE> interface.
	* @return The SnmpValue clone.
	*/
	final synchronized public SnmpValue duplicate() {
	return (SnmpValue) clone() ;
	}

	/**
	* Clones the <CODE>SnmpString</CODE> object, making a copy of its data.
	* @return The object clone.
	*/
	synchronized public Object clone() {
	SnmpString newclone = null ;

	try {
	newclone = (SnmpString) super.clone() ;
	newclone.value = new byte[value.length] ;
	System.arraycopy(value, 0, newclone.value, 0, value.length) ;
	} catch (CloneNotSupportedException e) {
	throw new InternalError(e) ; // vm bug.
	}
	return newclone ;
	}

	/**
	* Returns a textual description of the type object.
	* @return ASN.1 textual description.
	*/
	public String getTypeName() {
	return name ;
	}

	// VARIABLES
	//----------
	/**
	* Name of the type.
	*/
	final static String name = "String" ;

	/**
	* This is the bytes array of the string value.
	* @serial
	*/
	protected byte[] value = null ;
	}

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