/*
*
* This is a simple Content Management System (CMS)
* Copyright (C) 2010 Imran M Yousuf (imyousuf@smartitengineering.com)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.smartitengineering.cms.spi.impl.hbase;
import java.io.DataInput;
import java.io.EOFException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.commons.codec.binary.StringUtils;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.commons.lang.time.DateUtils;
import org.apache.hadoop.hbase.util.Bytes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author imyousuf
*/
public final class Utils {
private static final transient Logger logger = LoggerFactory.getLogger(Utils.class);
private Utils() {
}
public static byte[] toBytes(final Date date) {
if (date == null) {
return new byte[0];
}
try {
return StringUtils.getBytesUtf8(DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.format(date));
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public static Date toDate(final byte[] dateBytes) {
try {
String dateString = StringUtils.newStringUtf8(dateBytes);
return DateUtils.parseDate(dateString, new String[]{DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT.getPattern()});
}
catch (Exception ex) {
throw new RuntimeException(ex);
}
}
public static void organizeByPrefix(Map<byte[], byte[]> fieldMap, Map<String, Map<String, byte[]>> fieldsByName,
char separator) {
logger.debug("Organize by their prefix so that each field cells can be processed at once");
for (Entry<byte[], byte[]> entry : fieldMap.entrySet()) {
final String key = Bytes.toString(entry.getKey());
final int indexOfFirstColon = key.indexOf(separator);
if (indexOfFirstColon > -1) {
final String fieldName = key.substring(0, indexOfFirstColon);
final byte[] fieldNameBytes = Bytes.toBytes(fieldName);
if (Bytes.startsWith(entry.getKey(), fieldNameBytes)) {
Map<String, byte[]> fieldCells = fieldsByName.get(fieldName);
if (fieldCells == null) {
fieldCells = new LinkedHashMap<String, byte[]>();
fieldsByName.put(fieldName, fieldCells);
}
fieldCells.put(Bytes.toString(entry.getKey()), entry.getValue());
}
}
else {
fieldsByName.put(key, Collections.singletonMap(Bytes.toString(entry.getKey()), entry.getValue()));
}
}
}
public static void organizeByPrefixOnString(Map<String, byte[]> fieldMap,
Map<String, Map<String, byte[]>> fieldsByName, char separator) {
logger.debug("Organize by their prefix so that each field cells can be processed at once");
for (Entry<String, byte[]> entry : fieldMap.entrySet()) {
final String key = entry.getKey();
final int indexOfFirstColon = key.indexOf(separator);
if (indexOfFirstColon > -1) {
final String fieldName = key.substring(0, indexOfFirstColon);
Map<String, byte[]> fieldCells = fieldsByName.get(fieldName);
if (fieldCells == null) {
fieldCells = new LinkedHashMap<String, byte[]>();
fieldsByName.put(fieldName, fieldCells);
}
fieldCells.put(entry.getKey(), entry.getValue());
}
else {
fieldsByName.put(key, Collections.singletonMap(entry.getKey(), entry.getValue()));
}
}
}
public static String readStringInUTF8(DataInput in) throws IOException, UnsupportedEncodingException {
int allocationBlockSize = 2000;
int capacity = allocationBlockSize;
int length = 0;
ByteBuffer buffer = ByteBuffer.allocate(allocationBlockSize);
boolean notEof = true;
while (notEof) {
try {
buffer.put(in.readByte());
if (++length >= capacity) {
capacity += allocationBlockSize;
buffer.limit(capacity);
}
}
catch (EOFException ex) {
notEof = false;
}
}
String string = StringUtils.newStringUtf8(Arrays.copyOf(buffer.array(), length));
return string;
}
}