Package jadex.rules.rulesystem.rete.builder

Class BuildContext

  • public class BuildContext
extends java.lang.Object
    The build context contains all relevant data about the current net building process.

    • Field Detail

      • root

        protected ReteNode root
        The root node.

      • rule

        protected IRule rule
        The currently built rule.

      • lastanode

        protected INode lastanode
        The last alpha node.

      • lastbnode

        protected INode lastbnode
        The last beta node.

      • tuplecnt

        protected int tuplecnt
        The tuple cnt.

      • varinfos

        protected java.util.Map varinfos
        The first variable occurrence.

      • rightunavailable

        protected boolean rightunavailable
        Flag indicating that no right input is available (for collect nodes).

      • alpha

        protected boolean alpha
        Flag indicating if the builder is currently creating alpha nodes.

    • Constructor Detail

      • BuildContext

        public BuildContext​(ReteNode root,
                    IRule rule)
        Create a new build context.

    • Method Detail

      • getRootNode

        public ReteNode getRootNode()
        Get the root.
        Returns:
        The root.

      • setRootNode

        public void setRootNode​(ReteNode root)
        Set the root.
        Parameters:
        root - The root to set.

      • getRule

        public IRule getRule()
        Get the rule.
        Returns:
        The rule.

      • setRule

        public void setRule​(IRule rule)
        Set the rule.
        Parameters:
        rule - The rule to set.

      • getLastAlphaNode

        public INode getLastAlphaNode()
        Get the lastnode.
        Returns:
        The lastnode.

      • setLastAlphaNode

        public void setLastAlphaNode​(INode lastanode)
        Set the lastnode.
        Parameters:
        lastnode - The lastnode to set.

      • getLastBetaNode

        public INode getLastBetaNode()
        Get the lastnode.
        Returns:
        The lastnode.

      • setLastBetaNode

        public void setLastBetaNode​(INode lastbnode)
        Set the lastnode.
        Parameters:
        lastnode - The lastnode to set.

      • getTupleCount

        public int getTupleCount()
        Get the tuple count.
        Returns:
        The tuplecnt.

      • setTupleCount

        public void setTupleCount​(int tuplecnt)
        Set the tuple count.
        Parameters:
        tuplecnt - The tuplecnt to set.

      • addVarInfo

        public void addVarInfo​(VarInfo vi)
        Add a new var info.

      • getVarInfo

        public VarInfo getVarInfo​(Variable var)
        Get the variable info.
        Parameters:
        var - The variable.
        Returns:
        The variable info.

      • getVarInfos

        public java.util.Map getVarInfos()
        Get the variable infos.
        Returns:
        The variable infos.

      • isJoinable

        public boolean isJoinable​(Variable var)
        Test if a found variable is joinable (beta node), i.e. if it was formerly used in another condition.
        Parameters:
        var - The variable.
        Returns:
        True, if joinable.

      • isConstrainable

        public boolean isConstrainable​(Variable var)
        Test if a variable is constrainable (alpha node), i.e. was formerly used in this condition.
        Parameters:
        var - The variable.
        Returns:
        True, if constrainable.

      • isLeftAvailable

        public boolean isLeftAvailable​(Variable var)
        Test if a variable is left available.
        Parameters:
        var - The variable.
        Returns:
        True, if left available.

      • isRightUnavailable

        public boolean isRightUnavailable()
        Get the rightunavailable.
        Returns:
        The rightunavailable.

      • setRightUnavailable

        public void setRightUnavailable​(boolean rightunavailable)
        Set the rightunavailable.
        Parameters:
        rightunavailable - The rightunavailable to set.

      • isAlpha

        public boolean isAlpha()
        For each object condition, the builder first creates alpha nodes for all constraints that only apply to the object itself. Afterwards, a beta node is created, containing the additional (join) constraints.
        Returns:
        The alpha flag.

      • setAlpha

        public void setAlpha​(boolean alpha)
        Set the alpha flag.
        See Also:
        isAlpha()