The Java class must contain a public static method with the following signature:

public static boolean match(RuleContext ctx)

Enter the correct class in the Class Path field of the Java matcher. The Rule Engine reads the rules in the rule set and returns an error if the class path is incorrect, even if a rule is disabled.

When an error occurs with the Java class, the Rule Engine does not apply the rule. Instead, the Rule Engine continues to the next rule. The Rule Engine logs a detailed error message in the following file:

<Dynamic Data Masking installation>\log\DDMError.txt

The Java matcher has the following parameters:

Class Path

Defines a list of JAR files that contain the Java matcher class and necessary libraries. Use semicolons to separate multiple JAR files.

Class Name

Defines the fully qualified class name. The class may be built within a named or unnamed package. The class must include a method named

match

with the following signature:

public static boolean match(RuleContext ctx)

.

The

RuleContext

object contains data from the Rule Engine. The

RuleContext

object contains the following method to return the symbol value from the symbol name:

public String getSymbol(String symbol);

Use this method to retrieve symbol values that a Symbol rule action defines. Specify the name of the symbol as an argument to the method.

You can also use the following predefined symbols:

RuleContext.USERNAME

Retrieves the Oracle user name.

RuleContext.OS_USER

Retrieves the operating system user on the client machine.

RuleContext.CLIENT_HOST

Retrieves the name of the client machine.

RuleContext.PROGRAM

Retrieves the program name on the client machine.

RuleContext.STATEMENT

Retrieves the statement being processed.