Example usage for org.apache.commons.collections4.iterators ReverseListIterator hasNext

Introduction

In this page you can find the example usage for org.apache.commons.collections4.iterators ReverseListIterator hasNext.

Prototype

public boolean hasNext() 

Source Link

Document

Checks whether there is another element.

Usage

From source file:org.efaps.db.Insert.java

/**
 * A new statement must be created an executed for one table. If the
 * parameter '_id' is set to <code>0</code>, a new id is generated. If the
 * JDBC driver supports method <code>getGeneratedKeys</code>, this method is
 * used, otherwise method {@link org.efaps.db.databases#getNewId} is used to
 * retrieve a new id value./*w  w  w.  j a  v  a2s  . c  o  m*/
 *
 * @param _con      connection resource
 * @param _table    sql table used to insert
 * @param _values   values to be inserted
 * @param _id       new created id
 * @return new created id if parameter <i>_id</i> is set to <code>0</code>
 * @see #createOneStatement
 * @throws EFapsException on error
 */
private long executeOneStatement(final ConnectionResource _con, final SQLTable _table,
        final List<Value> _values, final long _id) throws EFapsException {
    Insert.LOG.debug("Preparing insert on table: {} for Values: {}", _table, _values);
    long ret = _id;
    try {
        final SQLInsert insert = Context.getDbType().newInsert(_table.getSqlTable(), _table.getSqlColId(),
                _id == 0);

        if (_id != 0) {
            insert.column(_table.getSqlColId(), _id);
        }
        if (_table.getSqlColType() != null) {
            insert.column(_table.getSqlColType(), getType().getId());
        }

        final ReverseListIterator<Value> iterator = new ReverseListIterator<Value>(_values);

        final Set<String> added = new HashSet<String>();
        while (iterator.hasNext()) {
            final Value value = iterator.next();
            final String colKey = value.getAttribute().getSqlColNames().toString();
            if (!added.contains(colKey)) {
                value.getAttribute().prepareDBInsert(insert, value.getValues());
                added.add(colKey);
            }
        }

        final Long bck = insert.execute(_con.getConnection());
        if (bck != null) {
            ret = bck;
        }

    } catch (final SQLException e) {
        Insert.LOG.error("executeOneStatement", e);
        throw new EFapsException(getClass(), "executeOneStatement.Exception", e, _table.getName());
    }
    return ret;
}

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From source file:org.efaps.db.Update.java

/**
 * The update is done without calling triggers and check of access rights.
 *
 * @throws EFapsException if update not possible (unique key, object does
 *             not exists, etc...)//from w  ww.j a  v a 2  s .  c om
 */
public void executeWithoutTrigger() throws EFapsException {
    if (Update.STATUSOK.getStati().isEmpty()) {
        final Context context = Context.getThreadContext();
        ConnectionResource con = null;
        try {
            con = context.getConnectionResource();
            for (final Entry<SQLTable, List<Value>> entry : this.table2values.entrySet()) {
                final SQLUpdate update = Context.getDbType().newUpdate(entry.getKey().getSqlTable(),
                        entry.getKey().getSqlColId(), getInstance().getId());
                // iterate in reverse order and only execute the ones that are not added yet, permitting
                // to overwrite the value for attributes by adding them later
                final ReverseListIterator<Value> iterator = new ReverseListIterator<Value>(entry.getValue());

                final Set<String> added = new HashSet<String>();
                while (iterator.hasNext()) {
                    final Value value = iterator.next();
                    final String colKey = value.getAttribute().getSqlColNames().toString();
                    if (!added.contains(colKey)) {
                        value.getAttribute().prepareDBUpdate(update, value.getValues());
                        added.add(colKey);
                    }
                }
                final Set<String> updatedColumns = update.execute(con.getConnection());
                final Iterator<Entry<Attribute, Value>> attrIter = this.trigRelevantAttr2values.entrySet()
                        .iterator();
                while (attrIter.hasNext()) {
                    final Entry<Attribute, Value> trigRelEntry = attrIter.next();
                    if (trigRelEntry.getKey().getTable().equals(entry.getKey())) {
                        boolean updated = false;
                        for (final String colName : trigRelEntry.getKey().getSqlColNames()) {
                            if (updatedColumns.contains(colName)) {
                                updated = true;
                                break;
                            }
                        }
                        if (!updated) {
                            attrIter.remove();
                        }
                    }
                }
            }
            con.commit();
            AccessCache.registerUpdate(getInstance());
            Queue.registerUpdate(getInstance());
        } catch (final SQLException e) {
            Update.LOG.error("Update of '" + this.instance + "' not possible", e);
            throw new EFapsException(getClass(), "executeWithoutTrigger.SQLException", e, this.instance);
        } finally {
            if (con != null && con.isOpened()) {
                con.abort();
            }
        }
    } else {
        throw new EFapsException(getClass(), "executeWithout.StatusInvalid", Update.STATUSOK.getStati());
    }
}

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