| /* |
| * 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.vxquery.datamodel.builders.atomic; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.io.UTFDataFormatException; |
| |
| import org.apache.vxquery.datamodel.builders.base.AbstractBuilder; |
| import org.apache.vxquery.runtime.functions.util.FunctionHelper; |
| |
| import edu.uci.ics.hyracks.data.std.api.IMutableValueStorage; |
| import edu.uci.ics.hyracks.data.std.primitive.BytePointable; |
| |
| public class UTF8StringBuilder extends AbstractBuilder { |
| private IMutableValueStorage mvs; |
| private DataOutput out; |
| |
| @Override |
| public void reset(IMutableValueStorage mvs) throws IOException { |
| this.mvs = mvs; |
| out = mvs.getDataOutput(); |
| out.write(0); |
| out.write(0); |
| } |
| |
| @Override |
| public void finish() throws IOException { |
| int utflen = mvs.getLength() - 2; |
| BytePointable.setByte(mvs.getByteArray(), 0, (byte) ((utflen >>> 8) & 0xFF)); |
| BytePointable.setByte(mvs.getByteArray(), 1, (byte) ((utflen >>> 0) & 0xFF)); |
| } |
| |
| public void appendCharArray(char[] ch, int start, int length) throws IOException { |
| FunctionHelper.writeCharArray(ch, start, length, out); |
| if (mvs.getLength() > 65535) { |
| throw new UTFDataFormatException("encoded string too long: " + mvs.getLength() + " bytes"); |
| } |
| } |
| } |