/*
* 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.oodt.cas.filemgr.metadata.extractors.examples;
// OODT imports
import org.apache.oodt.cas.filemgr.metadata.extractors.AbstractFilemgrMetExtractor;
import org.apache.oodt.cas.filemgr.structs.Product;
import org.apache.oodt.cas.metadata.Metadata;
import org.apache.oodt.cas.metadata.exceptions.MetExtractionException;
import org.apache.oodt.cas.metadata.util.PathUtils;
// Google imports
import com.google.common.base.Strings;
/**
* Expands a given metadata date time field out into multiple metadata fields (i.e. year, month,
* day, hour, minute, and second).
*
* @author bfoster@apache.org (Brian Foster)
*/
public class DateTimeExpandMetExtractor extends AbstractFilemgrMetExtractor {
private static final String FULL_DATE_TIME_KEY = "FullDateTimeKey";
private static final String FULL_DATE_TIME_FORMAT = "FullDateTimeFormat";
private static final String YEAR_KEY = "YearKey";
private static final String MONTH_KEY = "MonthKey";
private static final String DAY_KEY = "DayKey";
private static final String HOUR_KEY = "HourKey";
private static final String MINUTE_KEY = "MinuteKey";
private static final String SECOND_KEY = "SecondKey";
private String fullDateTimeKey;
private String fullDateTimeFormat;
private String yearKey;
private String monthKey;
private String dayKey;
private String hourKey;
private String minuteKey;
private String secondKey;
@Override
public void doConfigure() {
fullDateTimeKey = getKey(FULL_DATE_TIME_KEY);
fullDateTimeFormat = getKey(FULL_DATE_TIME_FORMAT);
yearKey = getKey(YEAR_KEY);
monthKey = getKey(MONTH_KEY);
dayKey = getKey(DAY_KEY);
hourKey = getKey(HOUR_KEY);
minuteKey = getKey(MINUTE_KEY);
secondKey = getKey(SECOND_KEY);
}
@Override
public Metadata doExtract(Product product, Metadata metadata) throws MetExtractionException {
String fullDateTime = getFullDateTime(metadata);
createDateField(metadata, yearKey, fullDateTime, fullDateTimeFormat, "yyyy");
createDateField(metadata, monthKey, fullDateTime, fullDateTimeFormat, "MM");
createDateField(metadata, dayKey, fullDateTime, fullDateTimeFormat, "dd");
createDateField(metadata, hourKey, fullDateTime, fullDateTimeFormat, "HH");
createDateField(metadata, minuteKey, fullDateTime, fullDateTimeFormat, "mm");
createDateField(metadata, secondKey, fullDateTime, fullDateTimeFormat, "ss");
return metadata;
}
private String getKey(String key) {
if (configuration.containsKey(key)) {
return configuration.getProperty(key);
} else {
return null;
}
}
private String getFullDateTime(Metadata metadata)
throws MetExtractionException {
if (!Strings.isNullOrEmpty(fullDateTimeKey)) {
return metadata.getMetadata(fullDateTimeKey);
} else {
throw new MetExtractionException("Failed to find DateTimeKey " + fullDateTimeKey);
}
}
private void createDateField(Metadata metadata, String fieldKey, String fullDateTime,
String fullDateTimeFormat, String fieldFormat) throws MetExtractionException {
if (!Strings.isNullOrEmpty(fieldKey)) {
try {
metadata.addMetadata(fieldKey, PathUtils.doDynamicReplacement(String.format(
"[FORMAT(%s,%s,%s)]", fullDateTimeFormat, fullDateTime, fieldFormat)));
} catch (Exception e) {
throw new MetExtractionException(String.format(
"Failed to create field for key %s from fullDateTime %s and fullDateTimeFormat %s",
fieldKey, fullDateTime, fullDateTimeFormat), e);
}
}
}
}