/*
* Copyright (C) 2007 Esmertec AG.
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed 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 com.google.android.mms.pdu;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
public class CharacterSets {
/**
* IANA assigned MIB enum numbers.
*
* From wap-230-wsp-20010705-a.pdf
* Any-charset = <Octet 128>
* Equivalent to the special RFC2616 charset value "*"
*/
public static final int ANY_CHARSET = 0x00;
public static final int US_ASCII = 0x03;
public static final int ISO_8859_1 = 0x04;
public static final int ISO_8859_2 = 0x05;
public static final int ISO_8859_3 = 0x06;
public static final int ISO_8859_4 = 0x07;
public static final int ISO_8859_5 = 0x08;
public static final int ISO_8859_6 = 0x09;
public static final int ISO_8859_7 = 0x0A;
public static final int ISO_8859_8 = 0x0B;
public static final int ISO_8859_9 = 0x0C;
public static final int SHIFT_JIS = 0x11;
public static final int UTF_8 = 0x6A;
public static final int BIG5 = 0x07EA;
public static final int UCS2 = 0x03E8;
public static final int UTF_16 = 0x03F7;
/**
* If the encoding of given data is unsupported, use UTF_8 to decode it.
*/
public static final int DEFAULT_CHARSET = UTF_8;
/**
* Array of MIB enum numbers.
*/
private static final int[] MIBENUM_NUMBERS = {
ANY_CHARSET,
US_ASCII,
ISO_8859_1,
ISO_8859_2,
ISO_8859_3,
ISO_8859_4,
ISO_8859_5,
ISO_8859_6,
ISO_8859_7,
ISO_8859_8,
ISO_8859_9,
SHIFT_JIS,
UTF_8,
BIG5,
UCS2,
UTF_16,
};
/**
* The Well-known-charset Mime name.
*/
public static final String MIMENAME_ANY_CHARSET = "*";
public static final String MIMENAME_US_ASCII = "us-ascii";
public static final String MIMENAME_ISO_8859_1 = "iso-8859-1";
public static final String MIMENAME_ISO_8859_2 = "iso-8859-2";
public static final String MIMENAME_ISO_8859_3 = "iso-8859-3";
public static final String MIMENAME_ISO_8859_4 = "iso-8859-4";
public static final String MIMENAME_ISO_8859_5 = "iso-8859-5";
public static final String MIMENAME_ISO_8859_6 = "iso-8859-6";
public static final String MIMENAME_ISO_8859_7 = "iso-8859-7";
public static final String MIMENAME_ISO_8859_8 = "iso-8859-8";
public static final String MIMENAME_ISO_8859_9 = "iso-8859-9";
public static final String MIMENAME_SHIFT_JIS = "shift_JIS";
public static final String MIMENAME_UTF_8 = "utf-8";
public static final String MIMENAME_BIG5 = "big5";
public static final String MIMENAME_UCS2 = "iso-10646-ucs-2";
public static final String MIMENAME_UTF_16 = "utf-16";
public static final String DEFAULT_CHARSET_NAME = MIMENAME_UTF_8;
/**
* Array of the names of character sets.
*/
private static final String[] MIME_NAMES = {
MIMENAME_ANY_CHARSET,
MIMENAME_US_ASCII,
MIMENAME_ISO_8859_1,
MIMENAME_ISO_8859_2,
MIMENAME_ISO_8859_3,
MIMENAME_ISO_8859_4,
MIMENAME_ISO_8859_5,
MIMENAME_ISO_8859_6,
MIMENAME_ISO_8859_7,
MIMENAME_ISO_8859_8,
MIMENAME_ISO_8859_9,
MIMENAME_SHIFT_JIS,
MIMENAME_UTF_8,
MIMENAME_BIG5,
MIMENAME_UCS2,
MIMENAME_UTF_16,
};
private static final HashMap<Integer, String> MIBENUM_TO_NAME_MAP;
private static final HashMap<String, Integer> NAME_TO_MIBENUM_MAP;
static {
// Create the HashMaps.
MIBENUM_TO_NAME_MAP = new HashMap<Integer, String>();
NAME_TO_MIBENUM_MAP = new HashMap<String, Integer>();
assert(MIBENUM_NUMBERS.length == MIME_NAMES.length);
int count = MIBENUM_NUMBERS.length - 1;
for(int i = 0; i <= count; i++) {
MIBENUM_TO_NAME_MAP.put(MIBENUM_NUMBERS[i], MIME_NAMES[i]);
NAME_TO_MIBENUM_MAP.put(MIME_NAMES[i], MIBENUM_NUMBERS[i]);
}
}
private CharacterSets() {} // Non-instantiatable
/**
* Map an MIBEnum number to the name of the charset which this number
* is assigned to by IANA.
*
* @param mibEnumValue An IANA assigned MIBEnum number.
* @return The name string of the charset.
* @throws UnsupportedEncodingException
*/
public static String getMimeName(int mibEnumValue)
throws UnsupportedEncodingException {
String name = MIBENUM_TO_NAME_MAP.get(mibEnumValue);
if (name == null) {
throw new UnsupportedEncodingException();
}
return name;
}
/**
* Map a well-known charset name to its assigned MIBEnum number.
*
* @param mimeName The charset name.
* @return The MIBEnum number assigned by IANA for this charset.
* @throws UnsupportedEncodingException
*/
public static int getMibEnumValue(String mimeName)
throws UnsupportedEncodingException {
if(null == mimeName) {
return -1;
}
Integer mibEnumValue = NAME_TO_MIBENUM_MAP.get(mimeName);
if (mibEnumValue == null) {
throw new UnsupportedEncodingException();
}
return mibEnumValue;
}
}