org.jactr.core.production.condition
Class SystemPropertyCondition

java.lang.Object
  org.jactr.core.production.condition.AbstractSlotCondition
      org.jactr.core.production.condition.SystemPropertyCondition

All Implemented Interfaces:

ICondition, ISlotContainer

public class SystemPropertyCondition
extends AbstractSlotCondition

condition that checks the values of system properties. The System properties are returned via System.getProperty(String) and merely checks the string values (no resolution to primitives is performed).

Author:

harrison

Constructor Summary

SystemPropertyCondition()

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.
ICondition	clone(IModel model, java.util.Map<java.lang.String,java.lang.Object> variableBindings) attempt to clone this condition before it will be bound in the instantiation phase.

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

Constructor Detail

SystemPropertyCondition

public SystemPropertyCondition()

Method Detail

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.

Returns:

number of unresolved variables

Throws:

CannotMatchException

clone

public ICondition clone(IModel model,
                        java.util.Map<java.lang.String,java.lang.Object> variableBindings)
                 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.

Returns:

a writable copy of the condition that will be bound

Throws:

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