com.mapr.ojai.store.impl

Class NaryOperator

java.lang.Object

com.mapr.ojai.store.impl.Expression

com.mapr.ojai.store.impl.OperatorExpression

com.mapr.ojai.store.impl.NaryOperator

Direct Known Subclasses:

RelationalOperator

public class NaryOperator
extends OperatorExpression

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression[]	arg
protected boolean	isPrefix

Fields inherited from class com.mapr.ojai.store.impl.OperatorExpression

opName

Constructor Summary

Constructors

Constructor and Description
NaryOperator(java.lang.String opName, java.util.List<Expression> arg)

Method Summary

Modifier and Type	Method and Description
protected void	addTopRelation(java.util.Map<org.ojai.FieldPath,java.util.List<NaryOperator>> topRelations, org.ojai.FieldPath fieldPath, NaryOperator relOp)
void	emitSql(java.lang.StringBuilder sb, java.lang.String tableAlias) Emit this expression's contribution to the string (where clause).
void	gatherExpressions(int depth, java.util.Map<org.ojai.FieldPath,java.util.List<NaryOperator>> topRelations, java.util.Set<Expression> otherPredicates) TODO: doc
static boolean	isLogicalOperator(java.lang.String name)
boolean	structuralEquals(Expression e) Check to see if the two expressions are equal.
int	structuralHashCode() Generate the hash code for the Expression.
org.ojai.store.QueryCondition	toQueryCondition(OjaiConnection ojaiConnection) Deprecated.
void	visit(ExpressionVisitor ev) Visit this node.

Methods inherited from class com.mapr.ojai.store.impl.Expression

toString

Methods inherited from class java.lang.Object

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

Field Detail

isPrefix

protected final boolean isPrefix

arg

protected final Expression[] arg

Constructor Detail

NaryOperator

public NaryOperator(java.lang.String opName,
                    java.util.List<Expression> arg)

Method Detail

isLogicalOperator

public static boolean isLogicalOperator(java.lang.String name)

emitSql

public void emitSql(java.lang.StringBuilder sb,
                    java.lang.String tableAlias)

Description copied from class: Expression

Emit this expression's contribution to the string (where clause).

Specified by:

emitSql in class Expression

Parameters:

sb - where to write to

tableAlias - the table alias to use for field names

structuralEquals

public boolean structuralEquals(Expression e)

Description copied from class: Expression

Check to see if the two expressions are equal. Two expressions are considered equal if they have the same shape, fields, and operators, but the literal values do not need to match.

Specified by:

structuralEquals in class Expression

Parameters:

e - the other expression to compare with

structuralHashCode

public int structuralHashCode()

Description copied from class: Expression

Generate the hash code for the Expression. Note that hashCodes do not depend on the values of literals; this is to aid in finding queries that are the same except for their constants (which could be replaced with bind variables, if they were supported).

Specified by:

structuralHashCode in class Expression

Returns:

the hash code

addTopRelation

protected void addTopRelation(java.util.Map<org.ojai.FieldPath,java.util.List<NaryOperator>> topRelations,
                              org.ojai.FieldPath fieldPath,
                              NaryOperator relOp)

toQueryCondition

@Deprecated
public org.ojai.store.QueryCondition toQueryCondition(OjaiConnection ojaiConnection)

Deprecated.

Convert this into a QueryCondition.

Parameters:

ojaiConnection - an OjaiConnection

Returns:

the QueryCondition

gatherExpressions

public void gatherExpressions(int depth,
                              java.util.Map<org.ojai.FieldPath,java.util.List<NaryOperator>> topRelations,
                              java.util.Set<Expression> otherPredicates)

Description copied from class: Expression

TODO: doc

Overrides:

gatherExpressions in class Expression

visit

public void visit(ExpressionVisitor ev)

Description copied from class: Expression

Visit this node. For nodes that have children, this will be expected to visit those in post-order.

Specified by:

visit in class Expression

Parameters:

ev - the visitor