Examples of org.hsqldb.RowAVLDisk

org.hsqldb.RowAVLDisk
In-memory representation of a disk-based database row object with methods for serialization and de-serialization.
A CachedRow is normally part of a circular double linked list which contains all of the Rows currently in the Cache for the database. It is unlinked from this list when it is freed from the Cache to make way for other rows.
New class derived from Hypersonic SQL code and enhanced in HSQLDB.
@author Fred Toussi (fredt@users dot sourceforge dot net) @author Thomas Mueller (Hypersonic SQL Group) @version 1.9.0 @since Hypersonic SQL

    }


    public void replace(PersistentStore store, Index index, NodeAVL n) {


        NodeAVLDisk node = this;
        RowAVLDisk  row  = this.row;


        if (!row.keepInMemory(true)) {
            row  = (RowAVLDisk) store.get(this.row, true);
            node = (NodeAVLDisk) row.getNode(iId);
        }


        if (node.iParent == NO_POS) {
            if (n != null) {
                n = n.setParent(store, null);
            }


            store.setAccessor(index, n);
        } else {
            boolean isFromLeft = node.isFromLeft(store);


            node.getParent(store).set(store, isFromLeft, n);
        }


        row.keepInMemory(false);
    }

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    }


    public CachedObject get(RowInputInterface in) {


        try {
            return new RowAVLDisk(table, in);
        } catch (IOException e) {
            throw Error.error(ErrorCode.DATA_FILE_ERROR, e);
        }
    }

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    }


    public CachedObject getNewCachedObject(Session session, Object object,
                                           boolean tx) {


        Row row = new RowAVLDisk(table, (Object[]) object, this);


        add(row);


        if (tx) {
            RowAction action = new RowAction(session, table,

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    public CachedObject get(RowInputInterface in) {


        try {
            if (isCached) {
                return new RowAVLDisk(table, in);
            }
        } catch (HsqlException e) {
            return null;
        } catch (IOException e1) {
            return null;

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                changeToDiskTable(session);
            }
        }


        if (isCached) {
            Row row = new RowAVLDisk(table, (Object[]) object, this);


            add(row);


            if (tx) {
                RowAction.addInsertAction(session, (Table) table, row);

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    }


    private NodeAVLDisk findNode(PersistentStore store, int pos) {


        NodeAVLDisk ret = null;
        RowAVLDisk  r   = (RowAVLDisk) store.get(pos, false);


        if (r != null) {
            ret = (NodeAVLDisk) r.getNode(iId);
        }


        return ret;
    }

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    }


    NodeAVL getLeft(PersistentStore store) {


        NodeAVLDisk node = this;
        RowAVLDisk  row  = this.row;


        if (!row.isInMemory()) {
            row  = (RowAVLDisk) store.get(this.row, false);
            node = (NodeAVLDisk) row.getNode(iId);
        }


        if (node.iLeft == NO_POS) {
            return null;
        }

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    }


    NodeAVL getRight(PersistentStore store) {


        NodeAVLDisk node = this;
        RowAVLDisk  row  = this.row;


        if (!row.isInMemory()) {
            row  = (RowAVLDisk) store.get(this.row, false);
            node = (NodeAVLDisk) row.getNode(iId);
        }


        if (node.iRight == NO_POS) {
            return null;
        }

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    }


    NodeAVL getParent(PersistentStore store) {


        NodeAVLDisk node = this;
        RowAVLDisk  row  = this.row;


        if (!row.isInMemory()) {
            row  = (RowAVLDisk) store.get(this.row, false);
            node = (NodeAVLDisk) row.getNode(iId);
        }


        if (node.iParent == NO_POS) {
            return null;
        }

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    }


    NodeAVL setParent(PersistentStore store, NodeAVL n) {


        NodeAVLDisk node = this;
        RowAVLDisk  row  = this.row;


        if (!row.keepInMemory(true)) {
            row  = (RowAVLDisk) store.get(this.row, true);
            node = (NodeAVLDisk) row.getNode(iId);
        }


        if (!row.isInMemory()) {
            throw Error.runtimeError(ErrorCode.U_S0500, "NAVLD");
        }


        row.setNodesChanged();


        node.iParent = n == null ? NO_POS
                                 : n.getPos();


        if (n != null && !n.isInMemory()) {
            n = findNode(store, n.getPos());
        }


        node.nParent = (NodeAVLDisk) n;


        row.keepInMemory(false);


        return node;
    }

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Related Classes of org.hsqldb.RowAVLDisk

org.hsqldb.index.NodeAVL

org.hsqldb.index.NodeAVLDisk

org.hsqldb.index.NodeAVLDiskLarge

org.hsqldb.persist.RowStoreAVLDisk

org.hsqldb.persist.RowStoreAVLHybrid

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