org.apache.ambari.server.api.predicate.operators

Class AbstractOperator

java.lang.Object

org.apache.ambari.server.api.predicate.operators.AbstractOperator

All Implemented Interfaces:

Operator

Direct Known Subclasses:

AndOperator, EqualsOperator, FilterOperator, GreaterEqualsOperator, GreaterOperator, InOperator, IsEmptyOperator, LessEqualsOperator, LessOperator, NotEqualsOperator, NotOperator, OrOperator

public abstract class AbstractOperator
extends Object
implements Operator

Base operator implementation.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.ambari.server.api.predicate.operators.Operator

Operator.TYPE

Field Summary

Fields inherited from interface org.apache.ambari.server.api.predicate.operators.Operator

MAX_OP_PRECEDENCE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractOperator(int ctxPrecedence) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getBasePrecedence() Return the base precedence for this operator.
abstract String	getName() Get the name of the operator.
int	getPrecedence() Obtain the precedence of the operator.
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ambari.server.api.predicate.operators.Operator

getType

Constructor Detail

AbstractOperator

protected AbstractOperator(int ctxPrecedence)

Constructor.

Parameters:

ctxPrecedence - the context precedence value

Method Detail

getBasePrecedence

public int getBasePrecedence()

Return the base precedence for this operator. This is the value that is specific to the operator type and doesn't take context into account.

Returns:

the base precedence for this operator type

getPrecedence

public int getPrecedence()

Description copied from interface: Operator

Obtain the precedence of the operator. This value is calculated based on the operators base precedence and the context of the surrounding expressions. Higher precedence values have higher precedence.

Specified by:

getPrecedence in interface Operator

Returns:

the precedence of this operator in it's current context

toString

public String toString()

Overrides:

toString in class Object

getName

public abstract String getName()

Get the name of the operator.

Returns:

the operator name