org.openanzo.sqlscribe
Class LogicalOperator

java.lang.Object
  org.openanzo.sqlscribe.LogicalOperator

All Implemented Interfaces:

Constraint

public class LogicalOperator
extends java.lang.Object
implements Constraint

Simple logical operators to be applied on constraints to build more complex constraints.

Author:

Joe Betz

Constructor Summary

LogicalOperator(java.lang.String operation)
Create a new logical constraint

LogicalOperator(java.lang.String operation, Constraint... constraints)
Create a new logical constraint

LogicalOperator(java.lang.String operation, java.util.List<Constraint> operands)
Create a new logical constraint between list of operands

Method Summary

void	addOperand(Constraint constraint) Add a constraint to the list of constraints to logically join
static LogicalOperator	and(Constraint... constraints) Create a new AND logical constraint
java.lang.String	getConstraint(java.util.List<java.lang.String> unboundVariables) Get the SQL text for this constraint, using any variables from the provided list
java.util.List<Constraint>	getOperands() Get the set of operands
java.util.Set<ITable>	listTables() Get the set of tables to which this constraint is based
static LogicalOperator	or(Constraint... constraints) Create a new OR logical constraint
void	writeConstraint(java.lang.StringBuffer buf, java.util.List<java.lang.String> unboundVariables) Write the SQL text for this constraint to the provided buffer, using any variables from the provided list

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalOperator

public LogicalOperator(java.lang.String operation,
                       Constraint... constraints)

Create a new logical constraint

Parameters:

operation - Operation text used to logically join to constraints

constraints - array of constraints

LogicalOperator

public LogicalOperator(java.lang.String operation,
                       java.util.List<Constraint> operands)

Create a new logical constraint between list of operands

Parameters:

operation - Operation text used to logically join to constraints

operands - list of constraints to logically join

LogicalOperator

public LogicalOperator(java.lang.String operation)

Create a new logical constraint

Parameters:

operation - Operation text used to logically join to constraints

Method Detail

and

public static LogicalOperator and(Constraint... constraints)

Create a new AND logical constraint

Parameters:

constraints - array of constraints

Returns:

a new AND logical constraint

or

public static LogicalOperator or(Constraint... constraints)

Create a new OR logical constraint

Parameters:

constraints - array of constraints

Returns:

a new OR logical constraint

addOperand

public void addOperand(Constraint constraint)

Add a constraint to the list of constraints to logically join

Parameters:

constraint - to add to operands

getOperands

public java.util.List<Constraint> getOperands()

Get the set of operands

Returns:

the set of operands

getConstraint

public java.lang.String getConstraint(java.util.List<java.lang.String> unboundVariables)

Description copied from interface: Constraint

Get the SQL text for this constraint, using any variables from the provided list

Specified by:

getConstraint in interface Constraint

Parameters:

unboundVariables - set of variables that can be used within constraints

Returns:

the SQL text for this constraint, using any variables from the provided list

writeConstraint

public void writeConstraint(java.lang.StringBuffer buf,
                            java.util.List<java.lang.String> unboundVariables)

Description copied from interface: Constraint

Write the SQL text for this constraint to the provided buffer, using any variables from the provided list

Specified by:

writeConstraint in interface Constraint

Parameters:

buf - StringBuffer to which the SQL text for this constraint is appended

unboundVariables - set of variables that can be used within constraints

listTables

public java.util.Set<ITable> listTables()

Description copied from interface: Constraint

Get the set of tables to which this constraint is based

Specified by:

listTables in interface Constraint

Returns:

the set of tables to which this constraint is based