io.netty.util.CharsetUtil Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.util;
import io.netty.util.internal.InternalThreadLocalMap;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CodingErrorAction;
import java.util.Map;
/**
* A utility class that provides various common operations and constants
* related with {@link Charset} and its relevant classes.
*/
public final class CharsetUtil {
/**
* 16-bit UTF (UCS Transformation Format) whose byte order is identified by
* an optional byte-order mark
*/
public static final Charset UTF_16 = Charset.forName("UTF-16");
/**
* 16-bit UTF (UCS Transformation Format) whose byte order is big-endian
*/
public static final Charset UTF_16BE = Charset.forName("UTF-16BE");
/**
* 16-bit UTF (UCS Transformation Format) whose byte order is little-endian
*/
public static final Charset UTF_16LE = Charset.forName("UTF-16LE");
/**
* 8-bit UTF (UCS Transformation Format)
*/
public static final Charset UTF_8 = Charset.forName("UTF-8");
/**
* ISO Latin Alphabet No. 1, as known as ISO-LATIN-1
*/
public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
/**
* 7-bit ASCII, as known as ISO646-US or the Basic Latin block of the
* Unicode character set
*/
public static final Charset US_ASCII = Charset.forName("US-ASCII");
private static final Charset[] CHARSETS = new Charset[]
{ UTF_16, UTF_16BE, UTF_16LE, UTF_8, ISO_8859_1, US_ASCII };
public static Charset[] values() {
return CHARSETS;
}
/**
* @deprecated Use {@link #encoder(Charset)}.
*/
@Deprecated
public static CharsetEncoder getEncoder(Charset charset) {
return encoder(charset);
}
/**
* Returns a new {@link CharsetEncoder} for the {@link Charset} with specified error actions.
*
* @param charset The specified charset
* @param malformedInputAction The encoder's action for malformed-input errors
* @param unmappableCharacterAction The encoder's action for unmappable-character errors
* @return The encoder for the specified {@code charset}
*/
public static CharsetEncoder encoder(Charset charset, CodingErrorAction malformedInputAction,
CodingErrorAction unmappableCharacterAction) {
checkNotNull(charset, "charset");
CharsetEncoder e = charset.newEncoder();
e.onMalformedInput(malformedInputAction).onUnmappableCharacter(unmappableCharacterAction);
return e;
}
/**
* Returns a new {@link CharsetEncoder} for the {@link Charset} with the specified error action.
*
* @param charset The specified charset
* @param codingErrorAction The encoder's action for malformed-input and unmappable-character errors
* @return The encoder for the specified {@code charset}
*/
public static CharsetEncoder encoder(Charset charset, CodingErrorAction codingErrorAction) {
return encoder(charset, codingErrorAction, codingErrorAction);
}
/**
* Returns a cached thread-local {@link CharsetEncoder} for the specified {@link Charset}.
*
* @param charset The specified charset
* @return The encoder for the specified {@code charset}
*/
public static CharsetEncoder encoder(Charset charset) {
checkNotNull(charset, "charset");
Map map = InternalThreadLocalMap.get().charsetEncoderCache();
CharsetEncoder e = map.get(charset);
if (e != null) {
e.reset().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE);
return e;
}
e = encoder(charset, CodingErrorAction.REPLACE, CodingErrorAction.REPLACE);
map.put(charset, e);
return e;
}
/**
* @deprecated Use {@link #decoder(Charset)}.
*/
@Deprecated
public static CharsetDecoder getDecoder(Charset charset) {
return decoder(charset);
}
/**
* Returns a new {@link CharsetDecoder} for the {@link Charset} with specified error actions.
*
* @param charset The specified charset
* @param malformedInputAction The decoder's action for malformed-input errors
* @param unmappableCharacterAction The decoder's action for unmappable-character errors
* @return The decoder for the specified {@code charset}
*/
public static CharsetDecoder decoder(Charset charset, CodingErrorAction malformedInputAction,
CodingErrorAction unmappableCharacterAction) {
checkNotNull(charset, "charset");
CharsetDecoder d = charset.newDecoder();
d.onMalformedInput(malformedInputAction).onUnmappableCharacter(unmappableCharacterAction);
return d;
}
/**
* Returns a new {@link CharsetDecoder} for the {@link Charset} with the specified error action.
*
* @param charset The specified charset
* @param codingErrorAction The decoder's action for malformed-input and unmappable-character errors
* @return The decoder for the specified {@code charset}
*/
public static CharsetDecoder decoder(Charset charset, CodingErrorAction codingErrorAction) {
return decoder(charset, codingErrorAction, codingErrorAction);
}
/**
* Returns a cached thread-local {@link CharsetDecoder} for the specified {@link Charset}.
*
* @param charset The specified charset
* @return The decoder for the specified {@code charset}
*/
public static CharsetDecoder decoder(Charset charset) {
checkNotNull(charset, "charset");
Map map = InternalThreadLocalMap.get().charsetDecoderCache();
CharsetDecoder d = map.get(charset);
if (d != null) {
d.reset().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE);
return d;
}
d = decoder(charset, CodingErrorAction.REPLACE, CodingErrorAction.REPLACE);
map.put(charset, d);
return d;
}
private CharsetUtil() { }
}