edu.cmu.aura.service.query
Class BoolNode

java.lang.Object
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  +--edu.cmu.aura.service.query.ExpressionNode
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        +--edu.cmu.aura.service.query.BoolNode

public class BoolNode

extends ExpressionNode

A boolean node in an expression tree applies a boolean operator to the results of its children.

Field Summary

static int	MAX_OP_INDEX
static int	OP_AND
static int	OP_NOT
static int	OP_OR
static java.lang.String[]	opNames

Constructor Summary

BoolNode(int operator, ExpressionNode leftChild)
Creates a BoolNode with a unary operator.

BoolNode(int operator, ExpressionNode leftChild, ExpressionNode rightChild)
Creates a BoolNode with a binary operator.

Method Summary

static int	getBoolOperator(java.lang.String boolOpName) Gets an operator given its name.
ExpressionNode	getLeftChild() Get the left child of this node.
java.lang.String	getOperatorName() Return the name of the operator at this BoolNode.
ExpressionNode	getRightChild() Get the right child of this node.
boolean	isUnary() Returns whether or not this BoolNode is unary.
void	setOperator(int operator) Set this node's operator

Methods inherited from class edu.cmu.aura.service.query.ExpressionNode

getOperator, isLeafNode

Methods inherited from class java.lang.Object

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

Field Detail

OP_AND

public static final int OP_AND

See Also:

Constant Field Values

OP_OR

public static final int OP_OR

See Also:

Constant Field Values

OP_NOT

public static final int OP_NOT

See Also:

Constant Field Values

MAX_OP_INDEX

public static final int MAX_OP_INDEX

See Also:

Constant Field Values

opNames

public static final java.lang.String[] opNames

Constructor Detail

BoolNode

public BoolNode(int operator,
                ExpressionNode leftChild,
                ExpressionNode rightChild)

Creates a BoolNode with a binary operator.

Parameters:

operator - the operator at this BoolNode

leftChild - the leftChild of this BoolNode

rightChild - the rightChild of this BoolNode

BoolNode

public BoolNode(int operator,
                ExpressionNode leftChild)

Creates a BoolNode with a unary operator.

Parameters:

operator - the operator at this BoolNode

leftChild - the leftChild of this BoolNode

Method Detail

getBoolOperator

public static int getBoolOperator(java.lang.String boolOpName)

Gets an operator given its name.

Parameters:

boolOpName - name of the operator to retrieve

Returns:

operator for the given boolOpName or -1 if the name is invalid

setOperator

public void setOperator(int operator)

Set this node's operator

Specified by:

setOperator in class ExpressionNode

Parameters:

operator - this node's operator

getOperatorName

public java.lang.String getOperatorName()

Return the name of the operator at this BoolNode.

Specified by:

getOperatorName in class ExpressionNode

Returns:

the name of this operator at this BoolNode

getLeftChild

public final ExpressionNode getLeftChild()

Get the left child of this node.

Returns:

the left child of this node

getRightChild

public final ExpressionNode getRightChild()

Get the right child of this node.

Returns:

the right child of this node

isUnary

public boolean isUnary()

Returns whether or not this BoolNode is unary.

Returns:

whether or not this BoolNode is unary