com.stratio.cassandra.lucene.schema.mapping.BitemporalMapper Maven / Gradle / Ivy
/**
* Copyright (C) 2014 Stratio (http://stratio.com)
*
* 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 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 com.stratio.cassandra.lucene.schema.mapping;
import com.google.common.base.MoreObjects;
import com.stratio.cassandra.lucene.IndexException;
import com.stratio.cassandra.lucene.column.Column;
import com.stratio.cassandra.lucene.column.Columns;
import com.stratio.cassandra.lucene.util.DateParser;
import org.apache.cassandra.db.marshal.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.LongField;
import org.apache.lucene.search.SortField;
import java.util.Arrays;
import java.util.Date;
/**
* A {@link Mapper} to map bitemporal DateRanges.
*
* @author Eduardo Alonso {@literal }
*/
public class BitemporalMapper extends Mapper {
/** The lucene Field suffix for vt_from */
public static final String VT_FROM_FIELD_SUFFIX = ".vtFrom";
/** The lucene Field suffix for vt_to */
public static final String VT_TO_FIELD_SUFFIX = ".vtTo";
/** The lucene Field suffix for tt_from */
public static final String TT_FROM_FIELD_SUFFIX = ".ttFrom";
/** The lucene Field suffix for tt_to */
public static final String TT_TO_FIELD_SUFFIX = ".ttTo";
/** The {@link DateParser} pattern. */
public final String pattern;
/** The name of the column containing the valid time start. **/
public final String vtFrom;
/** The name of the column containing the valid time stop. **/
public final String vtTo;
/** The name of the column containing the transaction time start. **/
public final String ttFrom;
/** The name of the column containing the transaction time stop. **/
public final String ttTo;
/** The NOW Value. **/
public final Long nowValue;
/** The {@link DateParser}. */
private final DateParser dateParser;
/**
* Builds a new {@link BitemporalMapper}.
*
* @param field the name of the field
* @param validated if the field must be validated
* @param vtFrom the name of the column containing the valid time start
* @param vtTo the name of the column containing the valid time end
* @param ttFrom the name of the column containing the transaction time start
* @param ttTo the name of the column containing the transaction time end
* @param pattern the date format pattern to be used
* @param nowValue the value representing now
*/
public BitemporalMapper(String field,
Boolean validated,
String vtFrom,
String vtTo,
String ttFrom,
String ttTo,
String pattern,
Object nowValue) {
super(field,
true,
false,
validated,
null,
Arrays.asList(vtFrom, vtTo, ttFrom, ttTo),
AsciiType.instance,
UTF8Type.instance,
Int32Type.instance,
LongType.instance,
IntegerType.instance,
SimpleDateType.instance,
TimestampType.instance,
TimeUUIDType.instance);
if (StringUtils.isBlank(vtFrom)) {
throw new IndexException("vt_from column name is required");
}
if (StringUtils.isBlank(vtTo)) {
throw new IndexException("vt_to column name is required");
}
if (StringUtils.isBlank(ttFrom)) {
throw new IndexException("tt_from column name is required");
}
if (StringUtils.isBlank(ttTo)) {
throw new IndexException("tt_to column name is required");
}
this.pattern = pattern == null ? DateParser.DEFAULT_PATTERN : pattern;
this.dateParser = new DateParser(this.pattern);
this.vtFrom = vtFrom;
this.vtTo = vtTo;
this.ttFrom = ttFrom;
this.ttTo = ttTo;
// Validate pattern
this.nowValue = (nowValue == null) ? Long.MAX_VALUE : dateParser.parse(nowValue).getTime();
}
/** {@inheritDoc} */
@Override
public void addFields(Document document, Columns columns) {
BitemporalDateTime vtFromTime = readBitemporalDate(columns, vtFrom);
BitemporalDateTime vtToTime = readBitemporalDate(columns, vtTo);
BitemporalDateTime ttFromTime = readBitemporalDate(columns, ttFrom);
BitemporalDateTime ttToTime = readBitemporalDate(columns, ttTo);
if (vtFromTime == null && vtToTime == null && ttFromTime == null && ttToTime == null) {
return;
}
validate(vtFromTime, vtToTime, ttFromTime, ttToTime);
document.add(new LongField(field + VT_FROM_FIELD_SUFFIX, vtFromTime.toDate().getTime(), STORE));
document.add(new LongField(field + VT_TO_FIELD_SUFFIX, vtToTime.toDate().getTime(), STORE));
document.add(new LongField(field + TT_FROM_FIELD_SUFFIX, ttFromTime.toDate().getTime(), STORE));
document.add(new LongField(field + TT_TO_FIELD_SUFFIX, ttToTime.toDate().getTime(), STORE));
}
private void validate(BitemporalDateTime vtFrom,
BitemporalDateTime vtTo,
BitemporalDateTime ttFrom,
BitemporalDateTime ttTo) {
if (vtFrom == null) {
throw new IndexException("vt_from column required");
}
if (vtTo == null) {
throw new IndexException("vt_to column required");
}
if (ttFrom == null) {
throw new IndexException("tt_from column required");
}
if (ttTo == null) {
throw new IndexException("tt_to column required");
}
if (vtFrom.after(vtTo)) {
throw new IndexException("vt_from:'%s' is after vt_to:'%s'",
vtTo.toString(dateParser),
vtFrom.toString(dateParser));
}
if (ttFrom.after(ttTo)) {
throw new IndexException("tt_from:'%s' is after tt_to:'%s'",
ttTo.toString(dateParser),
ttFrom.toString(dateParser));
}
}
/**
* Returns a {@link BitemporalDateTime} read from the specified {@link Columns}.
*
* @param columns the column where the data is
* @param fieldName the name of the field to be read from {@code columns}
* @return a bitemporal date time
*/
BitemporalDateTime readBitemporalDate(Columns columns, String fieldName) {
Column column = columns.getColumnsByFullName(fieldName).getFirst();
if (column == null) {
return null;
}
return parseBitemporalDate(column.getComposedValue());
}
private BitemporalDateTime checkIfNow(Long in) {
if (in > nowValue) {
throw new IndexException("BitemporalDateTime value '%s' exceeds Max Value: '%s'", in, nowValue);
} else if (in < nowValue) {
return new BitemporalDateTime(in);
} else {
return new BitemporalDateTime(Long.MAX_VALUE);
}
}
/**
* Parses an {@link Object} into a {@link BitemporalDateTime}. It parses {@link Long} and {@link String} format
* values based in pattern.
*
* @param value the object to be parsed
* @return a bitemporal date time
*/
public BitemporalDateTime parseBitemporalDate(Object value) {
Date opt = dateParser.parse(value);
if (opt != null) {
return checkIfNow(opt.getTime());
} else {
return null;
}
}
/** {@inheritDoc} */
@Override
public SortField sortField(String name, boolean reverse) {
throw new IndexException(String.format("Bitemporal mapper '%s' does not support sorting", name));
}
/** {@inheritDoc} */
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("field", field)
.add("validated", validated)
.add("vtFrom", vtFrom)
.add("vtTo", vtTo)
.add("ttFrom", ttFrom)
.add("ttTo", ttTo)
.add("pattern", pattern)
.add("nowValue", nowValue)
.toString();
}
public static class BitemporalDateTime implements Comparable {
public static final BitemporalDateTime MAX = new BitemporalDateTime(Long.MAX_VALUE);
public static final BitemporalDateTime MIN = new BitemporalDateTime(0L);
private final Long timestamp;
private final Date date;
/**
* @param date A date.
*/
public BitemporalDateTime(Date date) {
timestamp = date.getTime();
this.date = date;
}
/**
* @param timestamp A timestamp.
*/
public BitemporalDateTime(Long timestamp) {
if (timestamp < 0L) {
throw new IndexException("Cannot build a BitemporalDateTime with a negative unix time");
}
this.timestamp = timestamp;
date = new Date(timestamp);
}
public boolean isNow() {
return timestamp.equals(MAX.timestamp);
}
public boolean isMax() {
return timestamp.equals(MAX.timestamp);
}
public boolean isMin() {
return timestamp.equals(0L);
}
public Date toDate() {
return date;
}
public boolean after(BitemporalDateTime time) {
return date.after(time.date);
}
@Override
public int compareTo(BitemporalDateTime other) {
return timestamp.compareTo(other.timestamp);
}
public static BitemporalDateTime max(BitemporalDateTime bt1, BitemporalDateTime bt2) {
int result = bt1.compareTo(bt2);
return (result <= 0) ? bt2 : bt1;
}
/** {@inheritDoc} */
@Override
public String toString() {
return timestamp.toString();
}
public String toString(DateParser dateParser) {
return dateParser.toString(date);
}
/** {@inheritDoc} */
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
BitemporalDateTime that = (BitemporalDateTime) o;
return timestamp.equals(that.timestamp);
}
/** {@inheritDoc} */
@Override
public int hashCode() {
return timestamp.hashCode();
}
}
}
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