org.stt.gui.jfx.binding.ReportBinding.java Source code

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Here is the source code for org.stt.gui.jfx.binding.ReportBinding.java

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package org.stt.gui.jfx.binding;

import java.io.IOException;
import java.util.Collections;

import javafx.beans.binding.ObjectBinding;
import javafx.beans.value.ObservableValue;

import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.stt.filter.StartDateReaderFilter;
import org.stt.model.ReportingItem;
import org.stt.persistence.ItemReader;
import org.stt.persistence.ItemReaderProvider;
import org.stt.reporting.SummingReportGenerator;
import org.stt.reporting.SummingReportGenerator.Report;

import com.google.common.base.Preconditions;

/**
 *
 * @author dante
 */
public class ReportBinding extends ObjectBinding<Report> {

    private final ObservableValue<DateTime> reportStart;
    private final ObservableValue<DateTime> reportEnd;
    private final ItemReaderProvider readerProvider;

    public ReportBinding(ObservableValue<DateTime> reportStart, ObservableValue<DateTime> reportEnd,
            ItemReaderProvider readerProvider) {
        Preconditions.checkNotNull(reportStart);
        Preconditions.checkNotNull(reportEnd);
        Preconditions.checkNotNull(readerProvider);

        this.reportStart = reportStart;
        this.reportEnd = reportEnd;
        this.readerProvider = readerProvider;

        bind(reportStart, reportEnd);
    }

    @Override
    protected Report computeValue() {
        Report report;
        if (reportStart.getValue() != null && reportEnd.getValue() != null) {
            report = createSummaryReportFor();
        } else {
            report = new Report(Collections.<ReportingItem>emptyList(), null, null, Duration.ZERO);
        }
        return report;
    }

    private Report createSummaryReportFor() {
        try (ItemReader itemReader = readerProvider.provideReader();
                StartDateReaderFilter filter = new StartDateReaderFilter(itemReader, reportStart.getValue(),
                        reportEnd.getValue())) {
            SummingReportGenerator reportGenerator = new SummingReportGenerator(filter);
            return reportGenerator.createReport();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}