Package de.aristaflow.adept2.model.logmanagement

Enum Class CmpOperator

java.lang.Object
java.lang.Enum<CmpOperator>
de.aristaflow.adept2.model.logmanagement.CmpOperator
All Implemented Interfaces:
Serializable, Comparable<CmpOperator>, java.lang.constant.Constable
public enum CmpOperator extends Enum<CmpOperator>
An enumeration that defines the comparison operations supported by the log management facility, aka. log manager.
Author:
Patrick Schmidt

  • Enum Constant Details

    • EQUAL

      public static final CmpOperator EQUAL
      the "equals" operator

    • NOT_EQUAL

      public static final CmpOperator NOT_EQUAL
      the "not equals" operator

    • GREATER_THAN

      public static final CmpOperator GREATER_THAN
      the "greater than" operator

    • GREATER_THAN_OR_EQUAL

      public static final CmpOperator GREATER_THAN_OR_EQUAL
      the "greater than or equal" operator

    • LESS_THAN

      public static final CmpOperator LESS_THAN
      the "less than" operator

    • LESS_THAN_OR_EQUAL

      public static final CmpOperator LESS_THAN_OR_EQUAL
      the "less than or equal" operator

    • LIKE

      public static final CmpOperator LIKE
      The "like" operator works like SQL's LIKE operator. _ is a placeholder for exactly one character; % is a placeholder for an arbitrary number of characters (even zero). Only works on strings.

    • NOT_LIKE

      public static final CmpOperator NOT_LIKE
      A negated LIKE operator. Only works on strings.

    • LIKE_IGNORECASE

      public static final CmpOperator LIKE_IGNORECASE
      A case insensitive version of LIKE. When not using any placeholders this operator works like a case insensitive EQUAL. Only works on strings.

    • NOT_LIKE_IGNORECASE

      public static final CmpOperator NOT_LIKE_IGNORECASE
      A case insensitive version of NOT_LIKE. When not using any placeholders this operator works like a case insensitive NOT_EQUAL. Only works on strings.

  • Method Details

    • values

      public static CmpOperator[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static CmpOperator valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null

    • getSymbol

      public String getSymbol()
      Returns this comparison operator's associated symbol.
      Returns:
      this comparison operator's associated symbol

    • getCmpOperatorForSymbol

      public static CmpOperator getCmpOperatorForSymbol(String symbol)
      Returns the comparison operator to which the given symbol belongs or null if the symbol is not recognised.
      Parameters:
      symbol - the symbol for which to find the comparison operator
      Returns:
      the comparison operator for this symbol or null

    • canCompare

      public boolean canCompare(DataType dataType)
      Returns whether this comparison operator can generally work on the given data type. If it can, this at least guarantees that it can compare two values of this same type. If the parameter is null this method will determine if the operator can deal with null values (at the time of writing, only EQUAL and NOT_EQUAL can do that).
      Parameters:
      dataType - the data type to be tested
      Returns:
      whether this comparison operator can generally work on the given data type

    • canCompare

      public boolean canCompare(DataType columnDataType, DataType valueDataType)
      Returns whether this operator can compare the two given data types. The left-hand data type is the data type of a column and must therefore never be null. The right-hand data type is the data type of the value or null if the value itself is null. At the time of writing, only EQUAL and NOT_EQUAL can compare a null-value to the value of a column.
      Parameters:
      columnDataType - the left-hand data type (which should be the column's data type)
      valueDataType - the right-hand data type (which should be the value object's data type or null)
      Returns:
      whether this operator can compare the two given data types