Dépôt officiel du code source de l'ERP OpenConcerto

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.

 *

 * The contents of this file are subject to the terms of the GNU General Public License Version 3

 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a

 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific

 * language governing permissions and limitations under the License.

 *

 * When distributing the software, include this License Header Notice in each file.

 */

 package org.openconcerto.sql.view.list;

import org.openconcerto.sql.model.FieldPath;

import org.openconcerto.sql.model.SQLField;

import org.openconcerto.sql.model.SQLRowValues;

import org.openconcerto.sql.model.SQLRowValues.CreateMode;

import org.openconcerto.sql.model.SQLTable;

import org.openconcerto.sql.model.SQLTable.VirtualFields;

import org.openconcerto.sql.model.graph.Path;

import org.openconcerto.sql.view.list.search.SearchQueue;

import org.openconcerto.utils.CollectionUtils;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import net.jcip.annotations.GuardedBy;

import net.jcip.annotations.ThreadSafe;

/**

 * A line used by SQLTableModelSource, posessing an order and an id. Compare is done on the order.

 *

 * @author Sylvain

 */

@ThreadSafe

public final class ListSQLLine implements Comparable<ListSQLLine> {

    public static final int indexFromID(final List<ListSQLLine> l, final int id) {

        int foundIndex = -1;

        final int size = l.size();

        for (int i = 0; i < size; i++) {

            final int currentID = l.get(i).getID();

            if (currentID == id) {

                foundIndex = i;

                break;

            }

        }

        return foundIndex;

    }

    static final ListSQLLine fromID(final List<ListSQLLine> list, final int id) {

        final int size = list.size();

        for (int i = 0; i < size; i++) {

            final ListSQLLine line = list.get(i);

            if (line.getID() == id)

                return line;

        }

        return null;

    }

    private final SQLTableModelLinesSource src;

    // unmodifiable

    @GuardedBy("this")

    private SQLRowValues row;

    // Immutable

    private final SQLTableModelSourceState state;

    private final int id;

    // allow to order by something not in the row

    @GuardedBy("this")

    private Number order;

    // lists are accessed by Swing (model.getValueAt()) and

    // by the search queue (SearchRunnable#matchFilter(ListSQLLine line))

    // immutable

    @GuardedBy("this")

    private List<Object> list;

    ListSQLLine(SQLTableModelLinesSource src, SQLRowValues row, int id, final SQLTableModelSourceState state) {

        super();

        this.src = src;

        this.setRow(row);

        this.id = id;

        this.state = state;

        this.clearCache();

    }

    // load at least columnCount values

    // (to avoid loading debug columns, which took more time than the regular columns, ie more than

    // half the time was passed on almost never displayed values)

    private void loadCache(int columnCount) {

        updateList(columnCount, Collections.<Integer> emptySet());

    }

    public final SQLTableModelSourceState getState() {

        return this.state;

    }

    public final SQLTableModelColumns getColumns() {

        return this.getState().getAllColumns();

    }

    public final SQLTableModelLinesSource getSrc() {

        return this.src;

    }

    private final void setRow(SQLRowValues v) {

        if (!v.isFrozen())

            throw new IllegalArgumentException("Not frozen : " + v);

        synchronized (this) {

            this.row = v;

        }

    }

    public synchronized final SQLRowValues getRow() {

        return this.row;

    }

    @Override

    public int compareTo(ListSQLLine o) {

        if (this.src != o.src)

            throw new IllegalArgumentException(this.src + " != " + o.src);

        return this.src.compare(this, o);

    }

    public int getID() {

        return this.id;

    }

    public synchronized final void setOrder(Number order) {

        this.order = order;

    }

    public synchronized final Number getOrder() {

        return this.order;

    }

    public synchronized List<Object> getList(int columnCount) {

        this.loadCache(columnCount);

        return this.list;

    }

    public Object getValueAt(int column) {

        return this.getList(column + 1).get(column);

    }

    public final void setValueAt(Object obj, int colIndex) {

        this.getColumns().getColumns().get(colIndex).put(this, obj);

    }

    // should update this.list at the passed indexes, and then recursively for dependent columns

    // return all updated indexes

    // for now dependent columns (i.e. getUsedCols()) aren't supported so just return our parameter

    private final Set<Integer> updateValueAt(final Set<Integer> colIndexes) {

        if (colIndexes.size() == 0)

            return colIndexes;

        updateList(-1, colIndexes);

        return colIndexes;

    }

    // @param newSize negative means use current value

    private final boolean updateList(int newSize, final Set<Integer> colsToUpdate) {

        final int minIndexToUpdate;

        if (colsToUpdate.isEmpty()) {

            minIndexToUpdate = -1;

        } else {

            minIndexToUpdate = Collections.min(colsToUpdate).intValue();

            if (minIndexToUpdate < 0)

                throw new IllegalArgumentException("Negative indexes : " + colsToUpdate);

        }

        synchronized (this) {

            final int alreadyLoaded = this.list.size();

            if (newSize < 0)

                newSize = alreadyLoaded;

            // if there's enough items and either nothing to update or the columns to update aren't

            // yet needed, return

            if (alreadyLoaded >= newSize && (minIndexToUpdate < 0 || minIndexToUpdate >= alreadyLoaded))

                return false;

            final List<Object> newList = new ArrayList<Object>(newSize);

            for (int i = 0; i < newSize; i++) {

                final Object o;

                if (i >= alreadyLoaded || colsToUpdate.contains(i))

                    o = this.getColumns().getAllColumns().get(i).show(this.getRow());

                else

                    o = this.list.get(i);

                newList.add(o);

            }

            this.list = Collections.unmodifiableList(newList);

        }

        return true;

    }

    public void clearCache() {

        synchronized (this) {

            this.list = Collections.emptyList();

        }

    }

    /**

     * Load the passed values into this row at the passed path.

     *

     * @param id ID of vals, needed when vals is <code>null</code>.

     * @param vals values to load, eg CONTACT.NOM = "Dupont".

     * @param p where to load the values, eg "SITE.ID_CONTACT_CHEF".

     * @return the columns that were affected, <code>null</code> meaning all.

     */

    synchronized Set<Integer> loadAt(int id, SQLRowValues vals, Path p) {

        assert vals == null || vals.getID() == id;

        final String lastReferentField = SearchQueue.getLastReferentField(p);

        // null vals means id was deleted, the only way we care is if it was pointing to us

        // (otherwise the foreign key pointing to it would have changed first)

        assert vals != null || lastReferentField != null;

        // load() empties vals, so getFields() before

        final Set<Integer> indexes = lastReferentField == null ? this.pathToIndex(p, vals.getFields()) : null;

        // replace our values with the new ones

        final SQLRowValues copy = this.getRow().deepCopy();

        if (lastReferentField == null) {

            for (final SQLRowValues v : copy.followPath(p, CreateMode.CREATE_NONE, false)) {

                // check id, e.g. if p is BATIMENT <- LOCAL -> FAMILLE_LOCAL, then there's multiple

                // familles

                if (v.getID() == id)

                    v.load(vals.deepCopy(), null);

            }

        } else {

            // e.g. if p is SITE <- BATIMENT <- LOCAL, lastField is LOCAL.ID_BATIMENT

            // if p is SITE -> CLIENT <- SITE (i.e. siblings of a site), lastField is SITE.ID_CLIENT

            final SQLField lastField = p.getStep(-1).getSingleField();

            final Collection<SQLRowValues> previous;

            if (p.length() > 1 && p.getStep(-2).reverse().equals(p.getStep(-1)))

                previous = copy.followPath(p.minusLast(2), CreateMode.CREATE_NONE, false);

            else

                previous = null;

            // the rows that vals should point to, e.g. BATIMENT or CLIENT

            final Collection<SQLRowValues> targets = copy.followPath(p.minusLast(), CreateMode.CREATE_NONE, false);

            for (final SQLRowValues target : targets) {

                // remove existing referent with the updated ID

                SQLRowValues toRemove = null;

                for (final SQLRowValues toUpdate : target.getReferentRows(lastField)) {

                    // don't back track (in the example a given SITE will be at the primary location

                    // and a second time along its siblings)

                    if ((previous == null || !previous.contains(toUpdate)) && toUpdate.getID() == id) {

                        if (toRemove != null)

                            throw new IllegalStateException("Duplicate IDs " + id + " : " + System.identityHashCode(toRemove) + " and " + System.identityHashCode(toUpdate) + "\n" + copy.printGraph());

                        toRemove = toUpdate;

                    }

                }

                if (toRemove != null)

                    toRemove.remove(lastField.getName());

                // attach updated values

                if (vals != null && vals.getLong(lastField.getName()) == target.getIDNumber().longValue())

                    vals.deepCopy().put(lastField.getName(), target);

            }

        }

        copy.getGraph().freeze();

        this.setRow(copy);

        // update our cache

        if (indexes == null) {

            this.clearCache();

            return null;

        } else {

            return this.updateValueAt(indexes);

        }

    }

    /**

     * Find the columns that use the modifiedFields for their value.

     *

     * @param p the path to the modified fields, eg "CPI.ID_LOCAL".

     * @param modifiedFields the field modified, eg "DESIGNATION".

     * @return the index of columns using "CPI.ID_LOCAL.DESIGNATION", or null for every columns.

     */

    private Set<Integer> pathToIndex(final Path p, final Collection<String> modifiedFields) {

        // TODO check if the column paths start with any of the modified foreign keys

        // since it's quite expensive, add a cache in SQLTableModelSource

        if (containsFK(p.getLast(), modifiedFields)) {

            // e.g. CPI.ID_LOCAL, easier to just refresh the whole line, than to search for each

            // column affected (that would mean expanding the FK)

            return null;

        } else {

            final Set<Integer> res = new HashSet<Integer>();

            final Set<FieldPath> modifiedPaths = FieldPath.create(p, modifiedFields);

            final List<? extends SQLTableModelColumn> cols = this.getColumns().getAllColumns();

            for (int i = 0; i < cols.size(); i++) {

                final SQLTableModelColumn col = cols.get(i);

                if (CollectionUtils.containsAny(col.getPaths(), modifiedPaths))

                    res.add(i);

            }

            return res;

        }

    }

    private static boolean containsFK(final SQLTable t, Collection<String> fields) {

        final Set<SQLField> ffs = t.getFields(VirtualFields.FOREIGN_KEYS);

        for (final String f : fields) {

            if (ffs.contains(t.getField(f)))

                return true;

        }

        return false;

    }

    @Override

    public String toString() {

        return this.getClass().getSimpleName() + " on " + this.getRow();

    }

}