view flys-aft/src/main/java/de/intevation/aft/WQDiff.java @ 4282:8b4988815974

Added marker for Ws and Qs in Historical Discharge WQ charts. Therefore, the XYChartGenerator got two new methods addDomainMarker(Marker, boolean) and addValueMarker(Marker, boolean). The boolean parameters determine, if the marker should be visible or not. This is analogous to addAxisSeries(XYSeries, int, boolean).
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 29 Oct 2012 05:59:27 +0100
parents 82f5266f881b
children b195fede1c3b
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package de.intevation.aft;

import java.util.Collection;
import java.util.Set;
import java.util.TreeSet;
import java.util.Iterator;

import java.sql.ResultSet;
import java.sql.SQLException;

import de.intevation.db.ConnectedStatements;
import de.intevation.db.SymbolicStatement;

public class WQDiff
{
    protected Set<WQ> toAdd;
    protected Set<WQ> toDelete;

    public WQDiff() {
    }

    public WQDiff(Collection<WQ> a, Collection<WQ> b) {
        toAdd    = new TreeSet<WQ>(WQ.EPS_CMP);
        toDelete = new TreeSet<WQ>(WQ.EPS_CMP);
        build(a, b);
    }

    public void build(Collection<WQ> a, Collection<WQ> b) {
        toAdd.addAll(b);
        toAdd.removeAll(a);

        toDelete.addAll(a);
        toDelete.removeAll(b);
    }

    public void clear() {
        toAdd.clear();
        toDelete.clear();
    }

    public Set<WQ> getToAdd() {
        return toAdd;
    }

    public void setToAdd(Set<WQ> toAdd) {
        this.toAdd = toAdd;
    }

    public Set<WQ> getToDelete() {
        return toDelete;
    }

    public void setToDelete(Set<WQ> toDelete) {
        this.toDelete = toDelete;
    }

    public boolean hasChanges() {
        return !(toAdd.isEmpty() && toDelete.isEmpty());
    }

    public void writeChanges(
        SyncContext context, 
        int         tableId
    )
    throws SQLException
    {
        ConnectedStatements flysStatements = context.getFlysStatements();

        // Delete the old entries
        if (!toDelete.isEmpty()) {
            SymbolicStatement.Instance deleteDTV =
                flysStatements.getStatement("delete.discharge.table.value");
            for (WQ wq: toDelete) {
                deleteDTV
                    .clearParameters()
                    .setInt("id", wq.getId())
                    .execute();
            }
        }

        // Add the new entries.
        if (!toAdd.isEmpty()) {
            SymbolicStatement.Instance nextId =
                flysStatements.getStatement("next.discharge.table.values.id");

            SymbolicStatement.Instance insertDTV =
                flysStatements.getStatement("insert.discharge.table.value");

            // Recycle old ids as much as possible.
            Iterator<WQ> oldIds = toDelete.iterator();

            // Create ids for new entries.
            for (WQ wq: toAdd) {
                if (oldIds.hasNext()) {
                    wq.setId(oldIds.next().getId());
                }
                else {
                    ResultSet rs = nextId.executeQuery();
                    rs.next();
                    wq.setId(rs.getInt("discharge_table_values_id"));
                    rs.close();
                }
            }

            // Write the new entries.
            for (WQ wq: toAdd) {
                insertDTV
                    .clearParameters()
                    .setInt("id", wq.getId())
                    .setInt("table_id", tableId)
                    .setDouble("w", wq.getW())
                    .setDouble("q", wq.getQ())
                    .execute();
            }
        }
    }
}
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