Evaluator - JBoss RULES 3.0.6 API 英文版文档

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org.drools.spi
Interface Evaluator

All Superinterfaces:: java.io.Serializable

All Known Implementing Classes:: BaseEvaluator

public interface Evaluator
extends java.io.Serializable
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 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

static final int EQUAL

See Also:: Constant Field Values

NOT_EQUAL

static final int NOT_EQUAL

See Also:: Constant Field Values

LESS

static final int LESS

See Also:: Constant Field Values

LESS_OR_EQUAL

static final int LESS_OR_EQUAL

See Also:: Constant Field Values

GREATER

static final int GREATER

See Also:: Constant Field Values

GREATER_OR_EQUAL

static final int GREATER_OR_EQUAL

See Also:: Constant Field Values

CONTAINS

static final int CONTAINS

See Also:: Constant Field Values

MATCHES

static final int MATCHES

See Also:: Constant Field Values

EXCLUDES

static final int EXCLUDES

See Also:: Constant Field Values

CHAR_TYPE

static final int CHAR_TYPE

See Also:: Constant Field Values

BYTE_TYPE

static final int BYTE_TYPE

See Also:: Constant Field Values

SHORT_TYPE

static final int SHORT_TYPE

See Also:: Constant Field Values

INTEGER_TYPE

static final int INTEGER_TYPE

See Also:: Constant Field Values

LONG_TYPE

static final int LONG_TYPE

See Also:: Constant Field Values

FLOAT_TYPE

static final int FLOAT_TYPE

See Also:: Constant Field Values

DOUBLE_TYPE

static final int DOUBLE_TYPE

See Also:: Constant Field Values

BOOLEAN_TYPE

static final int BOOLEAN_TYPE

See Also:: Constant Field Values

STRING_TYPE

static final int STRING_TYPE

See Also:: Constant Field Values

DATE_TYPE

static final int DATE_TYPE

See Also:: Constant Field Values

ARRAY_TYPE

static final int ARRAY_TYPE

See Also:: Constant Field Values

OBJECT_TYPE

static final int OBJECT_TYPE

See Also:: Constant Field Values

NULL_TYPE

static final int NULL_TYPE

See Also:: Constant Field Values

Method Detail

getType

int getType()

getOperator

int getOperator()

evaluate

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.