org.jactr.core.production.condition
Class QueryCondition

java.lang.Object
  org.jactr.core.production.condition.AbstractSlotCondition
      org.jactr.core.production.condition.AbstractBufferCondition
          org.jactr.core.production.condition.QueryCondition

All Implemented Interfaces:

java.lang.Cloneable, IBufferCondition, ICondition, ISlotContainer

public class QueryCondition
extends AbstractBufferCondition
implements java.lang.Cloneable

condition for checking the state of a buffer

Author:

developer

Constructor Summary

QueryCondition(java.lang.String bufferName)

QueryCondition(java.lang.String bufferName, java.util.Collection<? extends ISlot> slots)

Method Summary

int	bind(IModel model, java.util.Map<java.lang.String,java.lang.Object> variableBindings, boolean isIterative) Iteratively perform the resolution and binding for this condition.
QueryCondition	clone()
QueryCondition	clone(IModel model, java.util.Map<java.lang.String,java.lang.Object> bindings) attempt to clone this condition before it will be bound in the instantiation phase.

Methods inherited from class org.jactr.core.production.condition.AbstractBufferCondition

getBufferName

Methods inherited from class org.jactr.core.production.condition.AbstractSlotCondition

addSlot, dispose, getConditionalSlots, getSlots, getSlots, removeSlot, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jactr.core.production.condition.ICondition

dispose

Constructor Detail

QueryCondition

public QueryCondition(java.lang.String bufferName)

QueryCondition

public QueryCondition(java.lang.String bufferName,
                      java.util.Collection<? extends ISlot> slots)

Method Detail

clone

public QueryCondition clone()

Overrides:

clone in class java.lang.Object

clone

public QueryCondition clone(IModel model,
                            java.util.Map<java.lang.String,java.lang.Object> bindings)
                     throws CannotMatchException

Description copied from interface: ICondition

attempt to clone this condition before it will be bound in the instantiation phase. We pass the current bindings so that the condition can do an early rejection if possible.

Specified by:

clone in interface ICondition

Returns:

a writable copy of the condition that will be bound

Throws:

CannotMatchException - if there is no way this condition can be matched

bind

public int bind(IModel model,
                java.util.Map<java.lang.String,java.lang.Object> variableBindings,
                boolean isIterative)
         throws CannotMatchException

Description copied from interface: ICondition

Iteratively perform the resolution and binding for this condition. If this condition defines any variables, they are placed into the bindings map for other conditions to exploit. Similarly, it will resolve any bindings that it needs in order to be matched. If at any point the condition determines that it cannot be matched, the exception is to be thrown. Similarly, if isIterative is false, and there are unresolved bindings, the exception should be thrown.
Otherwise, the number of unresolved bindings is returned which allows the instantiation calculation determine if another resolution round is required.

Specified by:

bind in interface ICondition

Returns:

number of unresolved variables

Throws:

CannotMatchException