| /* |
| * Copyright 2009-2013 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.dataflow.common.data.parsers; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| |
| public class IntegerParserFactory implements IValueParserFactory { |
| public static final IValueParserFactory INSTANCE = new IntegerParserFactory(); |
| |
| private static final long serialVersionUID = 1L; |
| |
| private IntegerParserFactory() { |
| } |
| |
| @Override |
| public IValueParser createValueParser() { |
| return new IValueParser() { |
| @Override |
| public void parse(char[] buffer, int start, int length, DataOutput out) throws HyracksDataException { |
| int n = 0; |
| int sign = 1; |
| int i = 0; |
| boolean pre = true; |
| for (; pre && i < length; ++i) { |
| char ch = buffer[i + start]; |
| switch (ch) { |
| case ' ': |
| case '\t': |
| case '\n': |
| case '\r': |
| case '\f': |
| break; |
| |
| case '-': |
| sign = -1; |
| pre = false; |
| break; |
| |
| case '0': |
| case '1': |
| case '2': |
| case '3': |
| case '4': |
| case '5': |
| case '6': |
| case '7': |
| case '8': |
| case '9': |
| pre = false; |
| n = n * 10 + (ch - '0'); |
| break; |
| |
| default: |
| throw new HyracksDataException("Encountered " + ch); |
| } |
| } |
| boolean post = false; |
| for (; !post && i < length; ++i) { |
| char ch = buffer[i + start]; |
| switch (ch) { |
| case '0': |
| case '1': |
| case '2': |
| case '3': |
| case '4': |
| case '5': |
| case '6': |
| case '7': |
| case '8': |
| case '9': |
| n = n * 10 + (ch - '0'); |
| break; |
| } |
| } |
| |
| for (; i < length; ++i) { |
| char ch = buffer[i + start]; |
| switch (ch) { |
| case ' ': |
| case '\t': |
| case '\n': |
| case '\r': |
| case '\f': |
| break; |
| |
| default: |
| throw new HyracksDataException("Encountered " + ch); |
| } |
| } |
| |
| try { |
| out.writeInt(n * sign); |
| } catch (IOException e) { |
| throw new HyracksDataException(e); |
| } |
| } |
| }; |
| } |
| } |