Package org.h2.result

Examples of org.h2.result.RowList

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        testReadOnly();
        testAdapter();
    }

    private static void testAdapter() {
        TraceSystem ts = new TraceSystem(null);
        ts.setLevelFile(TraceSystem.ADAPTER);
        ts.getTrace("test").info("test");
        ts.close();
    }
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        ts.getTrace("test").info("test");
        ts.close();
    }

    private void testTraceDebug() {
        TraceSystem ts = new TraceSystem(null);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ts.setSysOut(new PrintStream(out));
        ts.setLevelSystemOut(TraceSystem.DEBUG);
        ts.getTrace("test").debug(new Exception("error"), "test");
        ts.close();
        String outString = new String(out.toByteArray());
        assertContains(outString, "error");
        assertContains(outString, "Exception");
        assertContains(outString, "test");
    }
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    private void testReadOnly() throws Exception {
        String readOnlyFile = getBaseDir() + "/readOnly.log";
        IOUtils.delete(readOnlyFile);
        IOUtils.openFileOutputStream(readOnlyFile, false).close();
        FileSystem.getInstance(getBaseDir()).setReadOnly(readOnlyFile);
        TraceSystem ts = new TraceSystem(readOnlyFile);
        ts.setLevelFile(TraceSystem.INFO);
        ts.getTrace("test").info("test");
        IOUtils.delete(readOnlyFile);
        ts.close();
    }
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    private void testFutureModificationDate() throws Exception {
        File f = new File(getFile());
        f.delete();
        f.createNewFile();
        f.setLastModified(System.currentTimeMillis() + 10000);
        FileLock lock = new FileLock(new TraceSystem(null), getFile(), Constants.LOCK_SLEEP);
        lock.lock(FileLock.LOCK_FILE);
        lock.unlock();
    }
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        lock.lock(FileLock.LOCK_FILE);
        lock.unlock();
    }

    private void testSimple() {
        FileLock lock1 = new FileLock(new TraceSystem(null), getFile(), Constants.LOCK_SLEEP);
        FileLock lock2 = new FileLock(new TraceSystem(null), getFile(), Constants.LOCK_SLEEP);
        lock1.lock(FileLock.LOCK_FILE);
        createClassProxy(FileLock.class);
        assertThrows(ErrorCode.DATABASE_ALREADY_OPEN_1, lock2).
                lock(FileLock.LOCK_FILE);
        lock1.unlock();
        lock2 = new FileLock(new TraceSystem(null), getFile(), Constants.LOCK_SLEEP);
        lock2.lock(FileLock.LOCK_FILE);
        lock2.unlock();
    }
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    }

    public void run() {
        FileLock lock = null;
        while (!stop) {
            lock = new FileLock(new TraceSystem(null), getFile(), 100);
            try {
                lock.lock(allowSockets ? FileLock.LOCK_SOCKET : FileLock.LOCK_FILE);
                base.trace(lock + " locked");
                locks++;
                if (locks > 1) {
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        tableFilter.reset();
        Table table = tableFilter.getTable();
        session.getUser().checkRight(table, Right.DELETE);
        table.fire(session, Trigger.DELETE, true);
        table.lock(session, true, false);
        RowList rows = new RowList(session);
        int limitRows = -1;
        if (limitExpr != null) {
            Value v = limitExpr.getValue(session);
            if (v != ValueNull.INSTANCE) {
                limitRows = v.getInt();
            }
        }
        try {
            setCurrentRowNumber(0);
            while (limitRows != 0 && tableFilter.next()) {
                setCurrentRowNumber(rows.size() + 1);
                if (condition == null || Boolean.TRUE.equals(condition.getBooleanValue(session))) {
                    Row row = tableFilter.get();
                    boolean done = false;
                    if (table.fireRow()) {
                        done = table.fireBeforeRow(session, row, null);
                    }
                    if (!done) {
                        rows.add(row);
                        if (limitRows >= 0 && rows.size() >= limitRows) {
                            break;
                        }
                    }
                }
            }
            int rowScanCount = 0;
            for (rows.reset(); rows.hasNext();) {
                if ((++rowScanCount & 127) == 0) {
                    checkCanceled();
                }
                Row row = rows.next();
                table.removeRow(session, row);
                session.log(table, UndoLogRecord.DELETE, row);
            }
            if (table.fireRow()) {
                int count = 0;
                for (rows.reset(); rows.hasNext();) {
                    Row row = rows.next();
                    table.fireAfterRow(session, row, null, false);
                    count++;
                }
            }
            table.fire(session, Trigger.DELETE, false);
            return rows.size();
        } finally {
            rows.close();
        }
    }
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    }

    public int update() {
        tableFilter.startQuery(session);
        tableFilter.reset();
        RowList rows = new RowList(session);
        try {
            Table table = tableFilter.getTable();
            session.getUser().checkRight(table, Right.UPDATE);
            table.fire(session, Trigger.UPDATE, true);
            table.lock(session, true, false);
            int columnCount = table.getColumns().length;
            // get the old rows, compute the new rows
            setCurrentRowNumber(0);
            int count = 0;
            Column[] columns = table.getColumns();
            int limitRows = -1;
            if (limitExpr != null) {
                Value v = limitExpr.getValue(session);
                if (v != ValueNull.INSTANCE) {
                    limitRows = v.getInt();
                }
            }
            while (tableFilter.next()) {
                setCurrentRowNumber(count+1);
                if (limitRows >= 0 && count >= limitRows) {
                    break;
                }
                if (condition == null || Boolean.TRUE.equals(condition.getBooleanValue(session))) {
                    Row oldRow = tableFilter.get();
                    Row newRow = table.getTemplateRow();
                    for (int i = 0; i < columnCount; i++) {
                        Expression newExpr = expressionMap.get(columns[i]);
                        Value newValue;
                        if (newExpr == null) {
                            newValue = oldRow.getValue(i);
                        } else if (newExpr == ValueExpression.getDefault()) {
                            Column column = table.getColumn(i);
                            newValue = table.getDefaultValue(session, column);
                        } else {
                            Column column = table.getColumn(i);
                            newValue = column.convert(newExpr.getValue(session));
                        }
                        newRow.setValue(i, newValue);
                    }
                    table.validateConvertUpdateSequence(session, newRow);
                    boolean done = false;
                    if (table.fireRow()) {
                        done = table.fireBeforeRow(session, oldRow, newRow);
                    }
                    if (!done) {
                        rows.add(oldRow);
                        rows.add(newRow);
                    }
                    count++;
                }
            }
            // TODO self referencing referential integrity constraints
            // don't work if update is multi-row and 'inversed' the condition!
            // probably need multi-row triggers with 'deleted' and 'inserted'
            // at the same time. anyway good for sql compatibility
            // TODO update in-place (but if the key changes,
            // we need to update all indexes) before row triggers

            // the cached row is already updated - we need the old values
            table.updateRows(this, session, rows);
            if (table.fireRow()) {
                rows.invalidateCache();
                for (rows.reset(); rows.hasNext();) {
                    Row o = rows.next();
                    Row n = rows.next();
                    table.fireAfterRow(session, o, n, false);
                }
            }
            table.fire(session, Trigger.UPDATE, false);
            return count;
        } finally {
            rows.close();
        }
    }
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        tableFilter.reset();
        Table table = tableFilter.getTable();
        session.getUser().checkRight(table, Right.DELETE);
        table.fire(session, Trigger.DELETE, true);
        table.lock(session, true, false);
        RowList rows = new RowList(session);
        int limitRows = -1;
        if (limitExpr != null) {
            Value v = limitExpr.getValue(session);
            if (v != ValueNull.INSTANCE) {
                limitRows = v.getInt();
            }
        }
        try {
            setCurrentRowNumber(0);
            int count = 0;
            while (limitRows != 0 && tableFilter.next()) {
                setCurrentRowNumber(rows.size() + 1);
                if (condition == null || Boolean.TRUE.equals(condition.getBooleanValue(session))) {
                    Row row = tableFilter.get();
                    boolean done = false;
                    if (table.fireRow()) {
                        done = table.fireBeforeRow(session, row, null);
                    }
                    if (!done) {
                        rows.add(row);
                    }
                    count++;
                    if (limitRows >= 0 && count >= limitRows) {
                        break;
                    }
                }
            }
            int rowScanCount = 0;
            for (rows.reset(); rows.hasNext();) {
                if ((++rowScanCount & 127) == 0) {
                    checkCanceled();
                }
                Row row = rows.next();
                table.removeRow(session, row);
                session.log(table, UndoLogRecord.DELETE, row);
            }
            if (table.fireRow()) {
                for (rows.reset(); rows.hasNext();) {
                    Row row = rows.next();
                    table.fireAfterRow(session, row, null, false);
                }
            }
            table.fire(session, Trigger.DELETE, false);
            return count;
        } finally {
            rows.close();
        }
    }
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    }

    public int update() {
        tableFilter.startQuery(session);
        tableFilter.reset();
        RowList rows = new RowList(session);
        try {
            Table table = tableFilter.getTable();
            session.getUser().checkRight(table, Right.UPDATE);
            table.fire(session, Trigger.UPDATE, true);
            table.lock(session, true, false);
            int columnCount = table.getColumns().length;
            // get the old rows, compute the new rows
            setCurrentRowNumber(0);
            int count = 0;
            Column[] columns = table.getColumns();
            while (tableFilter.next()) {
                setCurrentRowNumber(count+1);
                if (condition == null || Boolean.TRUE.equals(condition.getBooleanValue(session))) {
                    Row oldRow = tableFilter.get();
                    Row newRow = table.getTemplateRow();
                    for (int i = 0; i < columnCount; i++) {
                        Expression newExpr = expressionMap.get(columns[i]);
                        Value newValue;
                        if (newExpr == null) {
                            newValue = oldRow.getValue(i);
                        } else if (newExpr == ValueExpression.getDefault()) {
                            Column column = table.getColumn(i);
                            newValue = table.getDefaultValue(session, column);
                        } else {
                            Column column = table.getColumn(i);
                            newValue = column.convert(newExpr.getValue(session));
                        }
                        newRow.setValue(i, newValue);
                    }
                    table.validateConvertUpdateSequence(session, newRow);
                    boolean done = false;
                    if (table.fireRow()) {
                        done = table.fireBeforeRow(session, oldRow, newRow);
                    }
                    if (!done) {
                        rows.add(oldRow);
                        rows.add(newRow);
                    }
                    count++;
                }
            }
            // TODO self referencing referential integrity constraints
            // don't work if update is multi-row and 'inversed' the condition!
            // probably need multi-row triggers with 'deleted' and 'inserted'
            // at the same time. anyway good for sql compatibility
            // TODO update in-place (but if the key changes,
            // we need to update all indexes) before row triggers

            // the cached row is already updated - we need the old values
            table.updateRows(this, session, rows);
            if (table.fireRow()) {
                rows.invalidateCache();
                for (rows.reset(); rows.hasNext();) {
                    Row o = rows.next();
                    Row n = rows.next();
                    table.fireAfterRow(session, o, n, false);
                }
            }
            table.fire(session, Trigger.UPDATE, false);
            return count;
        } finally {
            rows.close();
        }
    }
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