/**
* Copyright (C) 2014 JBoss Inc
*
* 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 org.dashbuilder.dataset.engine.group;
import java.util.Collections;
import java.util.List;
import javax.enterprise.context.ApplicationScoped;
import org.dashbuilder.dataset.engine.DataSetHandler;
import org.dashbuilder.dataset.group.ColumnGroup;
import org.dashbuilder.dataset.group.DateIntervalType;
import static org.dashbuilder.dataset.group.DateIntervalType.*;
/**
* Interval builder for date columns which generates a fixed number of intervals for a given interval size.
* <p>The only intervals sizes supported are: QUARTER, MONTH, DAY_OF_WEEK, HOUR, MINUTE & SECOND.</p>
*/
@ApplicationScoped
public class IntervalBuilderFixedDate implements IntervalBuilder {
/** List of the only DateIntervalType's supported as fixed date intervals. */
private DateIntervalType[] FIXED_INTERVALS_SUPPORTED = new DateIntervalType[] {
QUARTER, MONTH, DAY_OF_WEEK, HOUR, MINUTE, SECOND};
public IntervalList build(DataSetHandler ctx, ColumnGroup columnGroup) {
IntervalList intervalList = createIntervalList(columnGroup);
// Reverse intervals if requested
boolean asc = columnGroup.isAscendingOrder();
if (!asc) {
Collections.reverse(intervalList);
intervalList.add( 0, intervalList.remove( intervalList.size() - 1));
}
// Index the values
String columnId = columnGroup.getSourceId();
List values = ctx.getDataSet().getColumnById(columnId).getValues();
List<Integer> rows = ctx.getRows();
intervalList.indexValues(values, rows);
return intervalList;
}
public IntervalList createIntervalList(ColumnGroup columnGroup) {
DateIntervalType type = DateIntervalType.getByName(columnGroup.getIntervalSize());
if (QUARTER.equals(type)) {
return new IntervalListQuarter(columnGroup);
}
if (MONTH.equals(type)) {
return new IntervalListMonth(columnGroup);
}
if (DAY_OF_WEEK.equals(type)) {
return new IntervalListDayOfWeek(columnGroup);
}
if (HOUR.equals(type)) {
return new IntervalListHour(columnGroup);
}
if (MINUTE.equals(type)) {
return new IntervalListMinute(columnGroup);
}
if (SECOND.equals(type)) {
return new IntervalListSecond(columnGroup);
}
throw new IllegalArgumentException("Interval size '" + columnGroup.getIntervalSize() + "' not supported for " +
"fixed date intervals. The only supported sizes are: " + join(FIXED_INTERVALS_SUPPORTED, ","));
}
public String join(Object[] array, String separator) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < array.length; i++) {
if (i > 0) builder.append(separator);
builder.append(array[i]);
}
return builder.toString();
}
}