com.metamx.common.StringUtils Maven / Gradle / Ivy
/*
* Copyright 2014 Metamarkets Group Inc.
*
* 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.metamx.common;
import com.google.common.base.Charsets;
import com.google.common.base.Throwables;
import com.metamx.common.logger.Logger;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.IllegalFormatException;
/**
* As of right now (Dec 2014) the JVM is optimized around String charset variablse instead of Charset passing.
*/
public class StringUtils
{
@Deprecated // Charset parameters to String are currently slower than the charset's string name
public static final Charset UTF8_CHARSET = Charsets.UTF_8;
public static final String UTF8_STRING = com.google.common.base.Charsets.UTF_8.toString();
public static String fromUtf8(final byte[] bytes)
{
try {
return new String(bytes, UTF8_STRING);
}
catch (UnsupportedEncodingException e) {
// Should never happen
throw Throwables.propagate(e);
}
}
public static String fromUtf8(final ByteBuffer buffer, final int numBytes)
{
final byte[] bytes = new byte[numBytes];
buffer.get(bytes);
return fromUtf8(bytes);
}
public static String fromUtf8(final ByteBuffer buffer)
{
return fromUtf8(buffer, buffer.remaining());
}
public static byte[] toUtf8(final String string)
{
try {
return string.getBytes(UTF8_STRING);
}
catch (UnsupportedEncodingException e) {
// Should never happen
throw Throwables.propagate(e);
}
}
public static String safeFormat(String message, Object... formatArgs)
{
if(formatArgs == null || formatArgs.length == 0) {
return message;
}
try {
return String.format(message, formatArgs);
}
catch (IllegalFormatException e) {
StringBuilder bob = new StringBuilder(message);
for (Object formatArg : formatArgs) {
bob.append("; ").append(formatArg);
}
return bob.toString();
}
}
}