psdi.app.recontask.engine

Class ReconCompFilterExpression

java.lang.Object

psdi.app.recontask.engine.ReconExpression

psdi.app.recontask.engine.ReconCompFilterExpression

public class ReconCompFilterExpression
extends ReconExpression

Field Summary

Fields

Modifier and Type	Field and Description
protected DataSet	dataSet
protected java.lang.String[]	filterOperators

Fields inherited from class psdi.app.recontask.engine.ReconExpression

compiled, expressionTag, infixTokens, reconInfo, rootNode, TOKEN_CONSTANT, TOKEN_DATASET1_FIELD, TOKEN_DATASET2_FIELD, TOKEN_HIGHEST_VALUE, TOKEN_INVALID, TOKEN_LEFT_PARENTHESIS, TOKEN_LOWEST_VALUE, TOKEN_OPERATOR, TOKEN_RIGHT_PARENTHESIS, TOKEN_VALUE, validOperators

Constructor Summary

Constructors

Constructor and Description
ReconCompFilterExpression(DataSet dataSet, ReconInfo reconInfo)

Method Summary

Modifier and Type	Method and Description
ReconCompFilterReturn	evaluateExpression(ComparisonQueryHelper queries) Evaluates the expression, compiling it first if needed.
protected ReconCompFilterReturn	evaluateExpressionTree(BinaryTreeNode root, ComparisonQueryHelper queries) Traverse the binary tree using a recursive algorithm
protected void	readClause(MboRemote clause)
protected void	readOperator(MboRemote clause) Read the operator and value for the reconciliation comparison filter clause.

Methods inherited from class psdi.app.recontask.engine.ReconExpression

addExpressionToken, addExpressionToken, compileExpression, convertInfixToExpressionTree, convertTreeToInfixString, findOperator, getAndOrAttributeName, getAttributeSet, getAttributeToUnitMap, getCloseParentheses, getCompiledExpressionAsString, getExpressionTag, getExpressionTag, getOpenParentheses, getSequenceNum, handleLogicalAnd, handleLogicalOperator, handleLogicalOr, popLinkPush, prepareAttributeIndexes, processInfixExpression, processOperatorToken, processRightParenthesisToken, readExpression, readExpression, reset, setExpressionTag, walkTreeReplaceAttributeNamesWithIndexes, walkTreeToGetAttribSet, walkTreeToGetAttribToUnitMap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dataSet

protected DataSet dataSet

filterOperators

protected java.lang.String[] filterOperators

Constructor Detail

ReconCompFilterExpression

public ReconCompFilterExpression(DataSet dataSet,
                                 ReconInfo reconInfo)

Method Detail

evaluateExpression

public ReconCompFilterReturn evaluateExpression(ComparisonQueryHelper queries)
                                         throws MXException

Evaluates the expression, compiling it first if needed. The expression evaluation process will remove from the data those records that fail to satisfy the filtering conditions

Returns:

teh number of objects that satisfy teh condition

Throws:

MXException

evaluateExpressionTree

protected ReconCompFilterReturn evaluateExpressionTree(BinaryTreeNode root,
                                                       ComparisonQueryHelper queries)
                                                throws MXApplicationException

Traverse the binary tree using a recursive algorithm

The pseudocode is

if (root != null)

if ( [current node contains an operator] )

x = evaluateTree(root.left_child);

y = evaluateTree(root.right_child);

// Consult the design document why the logical operator AND is handled in the way it is

[Perform operation on x and y, specified by the operator and store result in z]

return z;

else

return root->data;

Returns:

a list of all IDs of all AssetObject instances that graduated successfully from the filter. Don't worry they may originate from different records database

Throws:

MXApplicationException

readOperator

protected void readOperator(MboRemote clause)
                     throws MXException,
                            java.rmi.RemoteException

Read the operator and value for the reconciliation comparison filter clause. If the operator is missing, substitute with the operator 'EXISTS' that lets through all instances found in the database

Parameters:

clause - for the reconciliation comparison filter clause

Throws:

MXException

java.rmi.RemoteException

readClause

protected void readClause(MboRemote clause)
                   throws MXException,
                          java.rmi.RemoteException

Specified by:

readClause in class ReconExpression

Throws:

MXException

java.rmi.RemoteException