Class AbstractRslNode

java.lang.Object
org.globus.rsl.AbstractRslNode
Direct Known Subclasses:
ListRslNode, RslNode
public abstract class AbstractRslNode extends Object
This class represents an abstract RSL parse tree. It is composed of variable definitions (bindings), relations, and sub-specifications (sub nodes).

  • Field Details

  • Constructor Details

    • AbstractRslNode

      public AbstractRslNode()

    • AbstractRslNode

      public AbstractRslNode(int operator)

  • Method Details

    • add

      public abstract boolean add(Bindings bindings)

    • add

      public abstract boolean add(NameOpValue relations)

    • add

      public boolean add(AbstractRslNode node)
      Adds a rsl parse tree to this node.
      Parameters:
      node - the rsl parse tree to add.

    • getParam

      public abstract NameOpValue getParam(String attribute)
      Returns the relation associated with the given attribute.
      Parameters:
      attribute - the attribute of the relation.
      Returns:
      the relation for the attribute. Null, if not found.

    • getBindings

      public abstract Bindings getBindings(String attribute)
      Returns the variable definitions associated wit the given attribute.
      Parameters:
      attribute - the attribute of the variable deinitions.
      Returns:
      the variable deinitions for the attribute. Null, if not found.

    • removeSpecification

      public boolean removeSpecification(AbstractRslNode node)
      Removes a specific sub-specification tree from the sub-specification list.
      Parameters:
      node - node to remove.
      Returns:
      true if the tree was removed successfuly. False, otherwise.

    • removeBindings

      public abstract Bindings removeBindings(String attribute)
      Removes a bindings list for the specified attribute.
      Parameters:
      attribute - the attribute name for the bindings.
      Returns:
      the bindings that were removed.

    • removeParam

      public abstract NameOpValue removeParam(String attribute)
      Removes a relation for the specified attribute.
      Parameters:
      attribute - the attribute name for the relation to remove.
      Returns:
      the relation that was removed.

    • merge

      public void merge(AbstractRslNode inNode)
      Merges the specified node with the current node. All sub-specifications from the given node will be copied to the current node. All relations and variable definitions will be added together in the current node.
      Parameters:
      inNode - the source parse tree.

    • mergeTo

      public void mergeTo(AbstractRslNode dstNode)

    • getSpecifications

      public List getSpecifications()
      Returns the list of sub-specifications.
      Returns:
      the list of other sub-specifications.

    • getOperator

      public int getOperator()
      Returns the node operator.
      Returns:
      the operator.

    • setOperator

      public void setOperator(int oper)
      Sets the operator.
      Parameters:
      oper - the operator.

    • getOperatorAsString

      public String getOperatorAsString()
      Returns the operator as a string.
      Returns:
      operator in a string representation.

    • getOperatorAsString

      public static String getOperatorAsString(int op)
      Returns a string represention of a given operator.
      Parameters:
      op - the operator.
      Returns:
      the string representation of the operator.

    • evaluate

      public AbstractRslNode evaluate() throws RslEvaluationException
      Evalutes the rsl tree. All the variable definitions are first evaluated because they might update the symbol table. Then all the relations followed by the sub-specifications are evaluated.
      Returns:
      the evaluated rsl tree.
      Throws:
      RslEvaluationException - If an error occured during rsl evaluation.

    • evaluate

      public abstract AbstractRslNode evaluate(Map symbolTable) throws RslEvaluationException
      Evalutes the rsl tree against the specified symbol table. All the variable definitions are first evaluated because they might update the symbol table. Then all the relations followed by the sub-specifications are evaluated.
      Parameters:
      symbolTable - the symbol table to evalute variables against.
      Returns:
      the evaluated rsl tree.
      Throws:
      RslEvaluationException - If an error occured during rsl evaluation.

    • toRSL

      public String toRSL(boolean explicitConcat)
      Returns a RSL representation of this relation.
      Note: Enable explicitConcat to generate more 'valid' RSL
      Parameters:
      explicitConcat - if true explicit concatination will be used in RSL strings.
      Returns:
      RSL representation of this relation.

    • toRSL

      public abstract void toRSL(StringBuffer buf, boolean explicitConcat)
      Produces a RSL representation of node.
      Parameters:
      buf - buffer to add the RSL representation to.
      explicitConcat - if true explicit concatination will be used in RSL strings.

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • canonicalize

      public static String canonicalize(String str)
      Canonicalizes a string by removing any underscores and moving all characters to lowercase.
      Parameters:
      str - string to canonicalize
      Returns:
      canonicalized string