com.whitestein.lsps.lang.operation

Enum StringComparisonOperation

java.lang.Object

java.lang.Enum<StringComparisonOperation>

com.whitestein.lsps.lang.operation.StringComparisonOperation

All Implemented Interfaces:

Operation, Serializable, Comparable<StringComparisonOperation>

public enum StringComparisonOperation
extends Enum<StringComparisonOperation>
implements Operation

Author:

rba

Enum Constant Summary

Enum Constants

Enum Constant and Description
GT String greater than.
GTE String greater than or equal.
LT String less than.
LTE String less than or equal.

Method Summary

Modifier and Type	Method and Description
protected abstract Boolean	exec(String left, String right) Executes a string comparison operation.
Boolean	execute(Interpreter interpreter, List<Expression> args, boolean variadicArgAsList, InterpreterStackTrace stackTrace) Executes the expression.
Boolean	execute(Namespace namespace, String operation, String left, String right)
static StringComparisonOperation	valueOf(String name) Returns the enum constant of this type with the specified name.
static StringComparisonOperation[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

LT

public static final StringComparisonOperation LT

String less than.

LTE

public static final StringComparisonOperation LTE

String less than or equal.

GT

public static final StringComparisonOperation GT

String greater than.

GTE

public static final StringComparisonOperation GTE

String greater than or equal.

Method Detail

values

public static StringComparisonOperation[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (StringComparisonOperation c : StringComparisonOperation.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static StringComparisonOperation valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

execute

public Boolean execute(Interpreter interpreter,
                       List<Expression> args,
                       boolean variadicArgAsList,
                       InterpreterStackTrace stackTrace)
                throws ErrorException

Description copied from interface: Operation

Executes the expression. The operation gets the interpreter and argument expressions instead of getting evaluated arguments. This can be used for late argument evaluation or not evaluating them at all.

Specified by:

execute in interface Operation

variadicArgAsList - if true, the variadic argument is given as expression returning a list; if false, the variadic argument is given as several individual expressions

stackTrace - a stack trace passed to the interpreter

Returns:

the result of the operation

Throws:

ErrorException

execute

public Boolean execute(Namespace namespace,
                       String operation,
                       String left,
                       String right)
                throws ErrorException

Throws:

ErrorException

exec

protected abstract Boolean exec(String left,
                                String right)

Executes a string comparison operation.

Parameters:

left -

right -

Returns:

the comparison result