com.metamatrix.query.optimizer
Interface CommandTreeProcessor

All Known Implementing Classes:

MergeTreeNodeProcessor

public interface CommandTreeProcessor

An object that performs some processing on a tree of CommandTreeNodes during command planning.

Method Summary

CommandTreeNode

process(CommandTreeNode root, QueryMetadataInterface metadata) Do any necessary processing on the given tree of command tree nodes; return the root of the modified tree.

Method Detail

process

CommandTreeNode process(CommandTreeNode root,
                        QueryMetadataInterface metadata)
                        throws QueryMetadataException,
                               MetaMatrixComponentException

Do any necessary processing on the given tree of command tree nodes; return the root of the modified tree.

Parameters:

root - root of the tree of nodes

metadata - source of metadata

Returns:

root of the modified tree, or just the root param if no modification occurred.

Throws:

QueryMetadataException

MetaMatrixComponentException