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Utility class for matching filter parameters to indizes. Matches are indicated by the index net.esper.filter.FilterParamIndex and the filter parameter net.esper.filter.FilterSpecParam featuring the same event property name and filter operator.

The following tables list the members exposed by the IndexHelper type.

Public Methods

  NameDescription
Equals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
static memberFindIndex
Find an index that matches one of the filter parameters passed. The parameter type and index type match up if the property name and filter operator are the same for the index and the filter parameter. For instance, for a filter parameter of "count EQUALS 10", the index against property "count" with operator type EQUALS will be returned, if present. NOTE: The caller is expected to obtain locks, if necessary, on the collections passed in.

static memberFindParameter
Determine among the passed in filter parameters any parameter that matches the given index on property name and filter operator type. Returns null if none of the parameters matches the index.

GetHashCode
Serves as a hash function for a particular type. GetHashCode() is suitable for use in hashing algorithms and data structures like a hash table.
(Inherited from Object.)
GetType
Gets the Type of the current instance.
(Inherited from Object.)
ToString
Returns a String that represents the current Object.
(Inherited from Object.)

Protected Methods

  NameDescription
Finalize
Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection.
(Inherited from Object.)
MemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)

Public Constructors

  NameDescription
IndexHelperNew