Class ExpressionEvaluator

java.lang.Object

org.cyclops.integrateddynamics.core.evaluate.expression.tree.ExpressionEvaluator

public final class ExpressionEvaluator
extends Object

Turns expression trees into variables.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ExpressionEvaluator.LocalValueCache	A value cache that is local to a single expression tree.
static class	ExpressionEvaluator.OnceVariable<V extends IValue>	A variable that evaluates an operator at most once, without registering invalidation listeners.

Method Summary

Modifier and Type	Method	Description
static IVariable<?>	buildBound(ExpressionNode node, IVariable[] params, it.unimi.dsi.fastutil.ints.Int2ObjectMap<IVariable<?>> refs)	Build a variable for a single evaluation.
static IVariable<?>	buildLazy(ExpressionNode root, int rootId, ILazyExpressionValueCache rootCache, IntFunction<IVariable<?>> refs)	Build a variable tree of cached lazy expressions.

Methods inherited from class Object

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

Method Details

buildLazy

@Nullable
public static IVariable<?> buildLazy(ExpressionNode root,
 int rootId,
 ILazyExpressionValueCache rootCache,
 IntFunction<IVariable<?>> refs)

Build a variable tree of cached lazy expressions. The root operator node is cached in the given value cache under the given id, inner operator nodes are cached in a cache that is local to this tree.

Parameters:

root - The root node.

rootId - The id under which the root is cached.

rootCache - The value cache of the root, usually the network.

refs - Resolves referenced variables, may return null if not available.

Returns:

The root variable, or null if a reference could not be resolved.

buildBound

public static IVariable<?> buildBound(ExpressionNode node,
 IVariable[] params,
 it.unimi.dsi.fastutil.ints.Int2ObjectMap<IVariable<?>> refs)
                               throws EvaluationException

Build a variable for a single evaluation. Operator nodes are evaluated lazily and at most once.

Parameters:

node - The node.

params - The parameter values.

refs - Bound referenced variables.

Returns:

The variable.

Throws:

EvaluationException - If a node can not be bound.