org.drools.spi
Interface Evaluator

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

BaseEvaluator

public interface Evaluator

extends java.io.Serializable

Field Summary

static int	ARRAY_TYPE
static int	BOOLEAN_TYPE
static int	BYTE_TYPE
static int	CHAR_TYPE
static int	CONTAINS
static int	DATE_TYPE
static int	DOUBLE_TYPE
static int	EQUAL
static int	EXCLUDES
static int	FLOAT_TYPE
static int	GREATER
static int	GREATER_OR_EQUAL
static int	INTEGER_TYPE
static int	LESS
static int	LESS_OR_EQUAL
static int	LONG_TYPE
static int	MATCHES
static int	NOT_EQUAL
static int	NULL_TYPE
static int	OBJECT_TYPE
static int	SHORT_TYPE
static int	STRING_TYPE

Method Summary

boolean	evaluate(java.lang.Object object1, java.lang.Object object2) This method will apply the evaluator on the objects.
int	getOperator()
int	getType()

Field Detail

EQUAL

public static final int EQUAL

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Constant Field Values

NOT_EQUAL

public static final int NOT_EQUAL

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LESS

public static final int LESS

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LESS_OR_EQUAL

public static final int LESS_OR_EQUAL

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GREATER

public static final int GREATER

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GREATER_OR_EQUAL

public static final int GREATER_OR_EQUAL

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CONTAINS

public static final int CONTAINS

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MATCHES

public static final int MATCHES

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EXCLUDES

public static final int EXCLUDES

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CHAR_TYPE

public static final int CHAR_TYPE

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BYTE_TYPE

public static final int BYTE_TYPE

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SHORT_TYPE

public static final int SHORT_TYPE

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INTEGER_TYPE

public static final int INTEGER_TYPE

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LONG_TYPE

public static final int LONG_TYPE

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FLOAT_TYPE

public static final int FLOAT_TYPE

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DOUBLE_TYPE

public static final int DOUBLE_TYPE

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BOOLEAN_TYPE

public static final int BOOLEAN_TYPE

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STRING_TYPE

public static final int STRING_TYPE

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DATE_TYPE

public static final int DATE_TYPE

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ARRAY_TYPE

public static final int ARRAY_TYPE

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OBJECT_TYPE

public static final int OBJECT_TYPE

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NULL_TYPE

public static final int NULL_TYPE

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Method Detail

getType

public int getType()

getOperator

public int getOperator()

evaluate

public boolean evaluate(java.lang.Object object1,
                        java.lang.Object object2)

This method will apply the evaluator on the objects. Typically, they follow this form: Fact(object1 operator object2) Where operator selects the appropraite concrete evaluator, and object1, and object2 are parameters to this method. So Person(age < 42) will have object1==age field (of the Person fact object) and "42" will be the object2 value.