| /* |
| * 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.runtime.functions.strings; |
| |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import org.apache.hyracks.data.std.primitive.UTF8StringPointable; |
| |
| public class UTF8StringCharacterIterator implements ICharacterIterator { |
| private static final Logger LOGGER = Logger.getLogger(UTF8StringCharacterIterator.class.getName()); |
| |
| private int byteOffset; |
| private final UTF8StringPointable stringp; |
| |
| public UTF8StringCharacterIterator(UTF8StringPointable stringp) { |
| this.stringp = stringp; |
| } |
| |
| public int getByteOffset() { |
| return byteOffset; |
| } |
| |
| @Override |
| public char next() { |
| // Default - no character exists. |
| int c = ICharacterIterator.EOS_CHAR; |
| if (byteOffset < stringp.getLength()) { |
| c = stringp.charAt(byteOffset); |
| if (LOGGER.isLoggable(Level.FINE)) { |
| LOGGER.finer(" UTF8StringCharacterIterator char[" + byteOffset + "] = " + c); |
| } |
| // Increment cursor |
| byteOffset += stringp.charSize(byteOffset); |
| } |
| if (LOGGER.isLoggable(Level.FINE)) { |
| LOGGER.finer(" END UTF8StringCharacterIterator char[" + byteOffset + "] = " + c); |
| } |
| return (char) c; |
| } |
| |
| @Override |
| public void reset() { |
| byteOffset = stringp.getMetaDataLength(); |
| } |
| |
| public void setByteOffset(int byteOffset) { |
| this.byteOffset = byteOffset; |
| } |
| |
| } |