Java tutorial
/* * 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.addthis.basis.chars; import java.nio.charset.UnmappableCharacterException; import com.google.common.annotations.Beta; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufHolder; import io.netty.buffer.ByteBufProcessor; /** * Static utility methods; likely subject to heavy change. */ @Beta public final class CharBufs { private CharBufs() { } public static ReadableCharBuf utf(byte[] bytes) { return new ByteArrayReadOnlyUtfBuf(bytes); } public static ReadableCharBuf utf(ByteBuf bytes) { return new ReadOnlyUtfBuf(bytes); } public static ReadableCharBuf utf(ByteBufHolder byteHolder) { return new ReadOnlyUtfBuf(byteHolder.content()); } public static ReadableCharBuf ascii(char[] values, int start, int length) { byte[] data = new byte[length]; for (int i = start; i < (start + length); i++) { char c = values[i]; if (c >= '\u0080') { throw new RuntimeException(new UnmappableCharacterException(2)); } data[i] = (byte) c; } return new ByteArrayReadOnlyAsciiBuf(data); } public static ReadableCharBuf ascii(char[] values) { return ascii(values, 0, values.length); } /** Aborts on negatives aka. non-ascii characters. */ public static final ByteBufProcessor FIND_NEGATIVE = new ByteBufProcessor() { @Override public boolean process(byte value) throws Exception { return value < 0; } }; }