| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 |
| * |
| * 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 org.apache.cassandra.db.marshal; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CharacterCodingException; |
| |
| import org.apache.cassandra.cql3.Constants; |
| import org.apache.cassandra.cql3.Json; |
| |
| import org.apache.cassandra.cql3.CQL3Type; |
| import org.apache.cassandra.cql3.Term; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| import org.apache.cassandra.serializers.AsciiSerializer; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public class AsciiType extends AbstractType<String> |
| { |
| public static final AsciiType instance = new AsciiType(); |
| |
| AsciiType() {super(ComparisonType.BYTE_ORDER);} // singleton |
| |
| private final ThreadLocal<CharsetEncoder> encoder = new ThreadLocal<CharsetEncoder>() |
| { |
| @Override |
| protected CharsetEncoder initialValue() |
| { |
| return Charset.forName("US-ASCII").newEncoder(); |
| } |
| }; |
| |
| public ByteBuffer fromString(String source) |
| { |
| // the encoder must be reset each time it's used, hence the thread-local storage |
| CharsetEncoder theEncoder = encoder.get(); |
| theEncoder.reset(); |
| |
| try |
| { |
| return theEncoder.encode(CharBuffer.wrap(source)); |
| } |
| catch (CharacterCodingException exc) |
| { |
| throw new MarshalException(String.format("Invalid ASCII character in string literal: %s", exc)); |
| } |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) throws MarshalException |
| { |
| try |
| { |
| return new Constants.Value(fromString((String) parsed)); |
| } |
| catch (ClassCastException exc) |
| { |
| throw new MarshalException(String.format( |
| "Expected an ascii string, but got a %s: %s", parsed.getClass().getSimpleName(), parsed)); |
| } |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, int protocolVersion) |
| { |
| try |
| { |
| return '"' + Json.quoteAsJsonString(ByteBufferUtil.string(buffer, Charset.forName("US-ASCII"))) + '"'; |
| } |
| catch (CharacterCodingException exc) |
| { |
| throw new AssertionError("ascii value contained non-ascii characters: ", exc); |
| } |
| } |
| |
| public CQL3Type asCQL3Type() |
| { |
| return CQL3Type.Native.ASCII; |
| } |
| |
| public TypeSerializer<String> getSerializer() |
| { |
| return AsciiSerializer.instance; |
| } |
| } |