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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.base.evaluators 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package org.drools.base.evaluators;
002:
003:        /*
004:         * Copyright 2005 JBoss Inc
005:         * 
006:         * Licensed under the Apache License, Version 2.0 (the "License");
007:         * you may not use this file except in compliance with the License.
008:         * You may obtain a copy of the License at
009:         * 
010:         *      http://www.apache.org/licenses/LICENSE-2.0
011:         * 
012:         * Unless required by applicable law or agreed to in writing, software
013:         * distributed under the License is distributed on an "AS IS" BASIS,
014:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015:         * See the License for the specific language governing permissions and
016:         * limitations under the License.
017:         */
018:
019:        import org.drools.base.BaseEvaluator;
020:        import org.drools.base.ValueType;
021:        import org.drools.common.InternalWorkingMemory;
022:        import org.drools.rule.VariableRestriction.DoubleVariableContextEntry;
023:        import org.drools.rule.VariableRestriction.VariableContextEntry;
024:        import org.drools.spi.Evaluator;
025:        import org.drools.spi.Extractor;
026:        import org.drools.spi.FieldValue;
027:
028:        public class FloatFactory implements  EvaluatorFactory {
029:
030:            private static final long serialVersionUID = 400L;
031:            private static EvaluatorFactory INSTANCE = new FloatFactory();
032:
033:            private FloatFactory() {
034:
035:            }
036:
037:            public static EvaluatorFactory getInstance() {
038:                if (FloatFactory.INSTANCE == null) {
039:                    FloatFactory.INSTANCE = new FloatFactory();
040:                }
041:                return FloatFactory.INSTANCE;
042:            }
043:
044:            public Evaluator getEvaluator(final Operator operator) {
045:                if (operator == Operator.EQUAL) {
046:                    return FloatEqualEvaluator.INSTANCE;
047:                } else if (operator == Operator.NOT_EQUAL) {
048:                    return FloatNotEqualEvaluator.INSTANCE;
049:                } else if (operator == Operator.LESS) {
050:                    return FloatLessEvaluator.INSTANCE;
051:                } else if (operator == Operator.LESS_OR_EQUAL) {
052:                    return FloatLessOrEqualEvaluator.INSTANCE;
053:                } else if (operator == Operator.GREATER) {
054:                    return FloatGreaterEvaluator.INSTANCE;
055:                } else if (operator == Operator.GREATER_OR_EQUAL) {
056:                    return FloatGreaterOrEqualEvaluator.INSTANCE;
057:                } else if (operator == Operator.MEMBEROF) {
058:                    return FloatMemberOfEvaluator.INSTANCE;
059:                } else if (operator == Operator.NOTMEMBEROF) {
060:                    return FloatNotMemberOfEvaluator.INSTANCE;
061:                } else {
062:                    throw new RuntimeException("Operator '" + operator
063:                            + "' does not exist for FloatEvaluator");
064:                }
065:            }
066:
067:            static class FloatEqualEvaluator extends BaseEvaluator {
068:
069:                private static final long serialVersionUID = 400L;
070:                public final static Evaluator INSTANCE = new FloatEqualEvaluator();
071:
072:                private FloatEqualEvaluator() {
073:                    super (ValueType.PFLOAT_TYPE, Operator.EQUAL);
074:                }
075:
076:                public boolean evaluate(InternalWorkingMemory workingMemory,
077:                        final Extractor extractor, final Object object1,
078:                        final FieldValue object2) {
079:                    if (extractor.isNullValue(workingMemory, object1)) {
080:                        return object2.isNull();
081:                    } else if (object2.isNull()) {
082:                        return false;
083:                    }
084:
085:                    // TODO: we are not handling delta right now... maybe we should
086:                    return extractor.getFloatValue(workingMemory, object1) == object2
087:                            .getFloatValue();
088:                }
089:
090:                public boolean evaluateCachedRight(
091:                        InternalWorkingMemory workingMemory,
092:                        final VariableContextEntry context, final Object left) {
093:                    if (context.declaration.getExtractor().isNullValue(
094:                            workingMemory, left)) {
095:                        return context.isRightNull();
096:                    } else if (context.isRightNull()) {
097:                        return false;
098:                    }
099:
100:                    // TODO: we are not handling delta right now... maybe we should
101:                    return context.declaration.getExtractor().getFloatValue(
102:                            workingMemory, left) == ((DoubleVariableContextEntry) context).right;
103:                }
104:
105:                public boolean evaluateCachedLeft(
106:                        InternalWorkingMemory workingMemory,
107:                        final VariableContextEntry context, final Object right) {
108:                    if (context.extractor.isNullValue(workingMemory, right)) {
109:                        return context.isLeftNull();
110:                    } else if (context.isLeftNull()) {
111:                        return false;
112:                    }
113:
114:                    // TODO: we are not handling delta right now... maybe we should
115:                    return ((DoubleVariableContextEntry) context).left == context.extractor
116:                            .getFloatValue(workingMemory, right);
117:                }
118:
119:                public boolean evaluate(InternalWorkingMemory workingMemory,
120:                        final Extractor extractor1, final Object object1,
121:                        final Extractor extractor2, final Object object2) {
122:                    if (extractor1.isNullValue(workingMemory, object1)) {
123:                        return extractor2.isNullValue(workingMemory, object2);
124:                    } else if (extractor2.isNullValue(workingMemory, object2)) {
125:                        return false;
126:                    }
127:
128:                    // TODO: we are not handling delta right now... maybe we should
129:                    return extractor1.getFloatValue(workingMemory, object1) == extractor2
130:                            .getFloatValue(workingMemory, object2);
131:                }
132:
133:                public String toString() {
134:                    return "Float ==";
135:                }
136:            }
137:
138:            static class FloatNotEqualEvaluator extends BaseEvaluator {
139:                /**
140:                 * 
141:                 */
142:                private static final long serialVersionUID = 400L;
143:                public final static Evaluator INSTANCE = new FloatNotEqualEvaluator();
144:
145:                private FloatNotEqualEvaluator() {
146:                    super (ValueType.PFLOAT_TYPE, Operator.NOT_EQUAL);
147:                }
148:
149:                public boolean evaluate(InternalWorkingMemory workingMemory,
150:                        final Extractor extractor, final Object object1,
151:                        final FieldValue object2) {
152:                    if (extractor.isNullValue(workingMemory, object1)) {
153:                        return !object2.isNull();
154:                    } else if (object2.isNull()) {
155:                        return true;
156:                    }
157:
158:                    // TODO: we are not handling delta right now... maybe we should
159:                    return extractor.getFloatValue(workingMemory, object1) != object2
160:                            .getFloatValue();
161:                }
162:
163:                public boolean evaluateCachedRight(
164:                        InternalWorkingMemory workingMemory,
165:                        final VariableContextEntry context, final Object left) {
166:                    if (context.declaration.getExtractor().isNullValue(
167:                            workingMemory, left)) {
168:                        return !context.isRightNull();
169:                    } else if (context.isRightNull()) {
170:                        return true;
171:                    }
172:
173:                    // TODO: we are not handling delta right now... maybe we should
174:                    return context.declaration.getExtractor().getFloatValue(
175:                            workingMemory, left) != ((DoubleVariableContextEntry) context).right;
176:                }
177:
178:                public boolean evaluateCachedLeft(
179:                        InternalWorkingMemory workingMemory,
180:                        final VariableContextEntry context, final Object right) {
181:                    if (context.extractor.isNullValue(workingMemory, right)) {
182:                        return !context.isLeftNull();
183:                    } else if (context.isLeftNull()) {
184:                        return true;
185:                    }
186:
187:                    // TODO: we are not handling delta right now... maybe we should
188:                    return ((DoubleVariableContextEntry) context).left != context.extractor
189:                            .getFloatValue(workingMemory, right);
190:                }
191:
192:                public boolean evaluate(InternalWorkingMemory workingMemory,
193:                        final Extractor extractor1, final Object object1,
194:                        final Extractor extractor2, final Object object2) {
195:                    if (extractor1.isNullValue(workingMemory, object1)) {
196:                        return !extractor2.isNullValue(workingMemory, object2);
197:                    } else if (extractor2.isNullValue(workingMemory, object2)) {
198:                        return true;
199:                    }
200:
201:                    // TODO: we are not handling delta right now... maybe we should
202:                    return extractor1.getFloatValue(workingMemory, object1) != extractor2
203:                            .getFloatValue(workingMemory, object2);
204:                }
205:
206:                public String toString() {
207:                    return "Float !=";
208:                }
209:            }
210:
211:            static class FloatLessEvaluator extends BaseEvaluator {
212:                /**
213:                 * 
214:                 */
215:                private static final long serialVersionUID = 400L;
216:                public final static Evaluator INSTANCE = new FloatLessEvaluator();
217:
218:                private FloatLessEvaluator() {
219:                    super (ValueType.PFLOAT_TYPE, Operator.LESS);
220:                }
221:
222:                public boolean evaluate(InternalWorkingMemory workingMemory,
223:                        final Extractor extractor, final Object object1,
224:                        final FieldValue object2) {
225:                    if (extractor.isNullValue(workingMemory, object1)) {
226:                        return false;
227:                    }
228:                    // TODO: we are not handling delta right now... maybe we should
229:                    return extractor.getFloatValue(workingMemory, object1) < object2
230:                            .getFloatValue();
231:                }
232:
233:                public boolean evaluateCachedRight(
234:                        InternalWorkingMemory workingMemory,
235:                        final VariableContextEntry context, final Object left) {
236:                    if (context.rightNull) {
237:                        return false;
238:                    }
239:                    // TODO: we are not handling delta right now... maybe we should
240:                    return ((DoubleVariableContextEntry) context).right < context.declaration
241:                            .getExtractor().getFloatValue(workingMemory, left);
242:                }
243:
244:                public boolean evaluateCachedLeft(
245:                        InternalWorkingMemory workingMemory,
246:                        final VariableContextEntry context, final Object right) {
247:                    if (context.extractor.isNullValue(workingMemory, right)) {
248:                        return false;
249:                    }
250:                    // TODO: we are not handling delta right now... maybe we should
251:                    return context.extractor
252:                            .getFloatValue(workingMemory, right) < ((DoubleVariableContextEntry) context).left;
253:                }
254:
255:                public boolean evaluate(InternalWorkingMemory workingMemory,
256:                        final Extractor extractor1, final Object object1,
257:                        final Extractor extractor2, final Object object2) {
258:                    if (extractor1.isNullValue(workingMemory, object1)) {
259:                        return false;
260:                    }
261:                    // TODO: we are not handling delta right now... maybe we should
262:                    return extractor1.getFloatValue(workingMemory, object1) < extractor2
263:                            .getFloatValue(workingMemory, object2);
264:                }
265:
266:                public String toString() {
267:                    return "Float <";
268:                }
269:            }
270:
271:            static class FloatLessOrEqualEvaluator extends BaseEvaluator {
272:                /**
273:                 * 
274:                 */
275:                private static final long serialVersionUID = 400L;
276:                public final static Evaluator INSTANCE = new FloatLessOrEqualEvaluator();
277:
278:                private FloatLessOrEqualEvaluator() {
279:                    super (ValueType.PFLOAT_TYPE, Operator.LESS_OR_EQUAL);
280:                }
281:
282:                public boolean evaluate(InternalWorkingMemory workingMemory,
283:                        final Extractor extractor, final Object object1,
284:                        final FieldValue object2) {
285:                    if (extractor.isNullValue(workingMemory, object1)) {
286:                        return false;
287:                    }
288:                    // TODO: we are not handling delta right now... maybe we should
289:                    return extractor.getFloatValue(workingMemory, object1) <= object2
290:                            .getFloatValue();
291:                }
292:
293:                public boolean evaluateCachedRight(
294:                        InternalWorkingMemory workingMemory,
295:                        final VariableContextEntry context, final Object left) {
296:                    if (context.rightNull) {
297:                        return false;
298:                    }
299:                    // TODO: we are not handling delta right now... maybe we should
300:                    return ((DoubleVariableContextEntry) context).right <= context.declaration
301:                            .getExtractor().getFloatValue(workingMemory, left);
302:                }
303:
304:                public boolean evaluateCachedLeft(
305:                        InternalWorkingMemory workingMemory,
306:                        final VariableContextEntry context, final Object right) {
307:                    if (context.extractor.isNullValue(workingMemory, right)) {
308:                        return false;
309:                    }
310:                    // TODO: we are not handling delta right now... maybe we should
311:                    return context.extractor
312:                            .getFloatValue(workingMemory, right) <= ((DoubleVariableContextEntry) context).left;
313:                }
314:
315:                public boolean evaluate(InternalWorkingMemory workingMemory,
316:                        final Extractor extractor1, final Object object1,
317:                        final Extractor extractor2, final Object object2) {
318:                    if (extractor1.isNullValue(workingMemory, object1)) {
319:                        return false;
320:                    }
321:                    // TODO: we are not handling delta right now... maybe we should
322:                    return extractor1.getFloatValue(workingMemory, object1) <= extractor2
323:                            .getFloatValue(workingMemory, object2);
324:                }
325:
326:                public String toString() {
327:                    return "Float <=";
328:                }
329:            }
330:
331:            static class FloatGreaterEvaluator extends BaseEvaluator {
332:                /**
333:                 * 
334:                 */
335:                private static final long serialVersionUID = 400L;
336:                public final static Evaluator INSTANCE = new FloatGreaterEvaluator();
337:
338:                private FloatGreaterEvaluator() {
339:                    super (ValueType.PFLOAT_TYPE, Operator.GREATER);
340:                }
341:
342:                public boolean evaluate(InternalWorkingMemory workingMemory,
343:                        final Extractor extractor, final Object object1,
344:                        final FieldValue object2) {
345:                    if (extractor.isNullValue(workingMemory, object1)) {
346:                        return false;
347:                    }
348:                    // TODO: we are not handling delta right now... maybe we should
349:                    return extractor.getFloatValue(workingMemory, object1) > object2
350:                            .getFloatValue();
351:                }
352:
353:                public boolean evaluateCachedRight(
354:                        InternalWorkingMemory workingMemory,
355:                        final VariableContextEntry context, final Object left) {
356:                    if (context.rightNull) {
357:                        return false;
358:                    }
359:                    // TODO: we are not handling delta right now... maybe we should
360:                    return ((DoubleVariableContextEntry) context).right > context.declaration
361:                            .getExtractor().getFloatValue(workingMemory, left);
362:                }
363:
364:                public boolean evaluateCachedLeft(
365:                        InternalWorkingMemory workingMemory,
366:                        final VariableContextEntry context, final Object right) {
367:                    if (context.extractor.isNullValue(workingMemory, right)) {
368:                        return false;
369:                    }
370:                    // TODO: we are not handling delta right now... maybe we should
371:                    return context.extractor
372:                            .getFloatValue(workingMemory, right) > ((DoubleVariableContextEntry) context).left;
373:                }
374:
375:                public boolean evaluate(InternalWorkingMemory workingMemory,
376:                        final Extractor extractor1, final Object object1,
377:                        final Extractor extractor2, final Object object2) {
378:                    if (extractor1.isNullValue(workingMemory, object1)) {
379:                        return false;
380:                    }
381:                    // TODO: we are not handling delta right now... maybe we should
382:                    return extractor1.getFloatValue(workingMemory, object1) > extractor2
383:                            .getFloatValue(workingMemory, object2);
384:                }
385:
386:                public String toString() {
387:                    return "Float >";
388:                }
389:            }
390:
391:            static class FloatGreaterOrEqualEvaluator extends BaseEvaluator {
392:                /**
393:                 * 
394:                 */
395:                private static final long serialVersionUID = 400L;
396:                private final static Evaluator INSTANCE = new FloatGreaterOrEqualEvaluator();
397:
398:                private FloatGreaterOrEqualEvaluator() {
399:                    super (ValueType.PFLOAT_TYPE, Operator.GREATER_OR_EQUAL);
400:                }
401:
402:                public boolean evaluate(InternalWorkingMemory workingMemory,
403:                        final Extractor extractor, final Object object1,
404:                        final FieldValue object2) {
405:                    if (extractor.isNullValue(workingMemory, object1)) {
406:                        return false;
407:                    }
408:                    // TODO: we are not handling delta right now... maybe we should
409:                    return extractor.getFloatValue(workingMemory, object1) >= object2
410:                            .getFloatValue();
411:                }
412:
413:                public boolean evaluateCachedRight(
414:                        InternalWorkingMemory workingMemory,
415:                        final VariableContextEntry context, final Object left) {
416:                    if (context.rightNull) {
417:                        return false;
418:                    }
419:                    // TODO: we are not handling delta right now... maybe we should
420:                    return ((DoubleVariableContextEntry) context).right >= context.declaration
421:                            .getExtractor().getFloatValue(workingMemory, left);
422:                }
423:
424:                public boolean evaluateCachedLeft(
425:                        InternalWorkingMemory workingMemory,
426:                        final VariableContextEntry context, final Object right) {
427:                    if (context.extractor.isNullValue(workingMemory, right)) {
428:                        return false;
429:                    }
430:                    // TODO: we are not handling delta right now... maybe we should
431:                    return context.extractor
432:                            .getFloatValue(workingMemory, right) >= ((DoubleVariableContextEntry) context).left;
433:                }
434:
435:                public boolean evaluate(InternalWorkingMemory workingMemory,
436:                        final Extractor extractor1, final Object object1,
437:                        final Extractor extractor2, final Object object2) {
438:                    if (extractor1.isNullValue(workingMemory, object1)) {
439:                        return false;
440:                    }
441:                    // TODO: we are not handling delta right now... maybe we should
442:                    return extractor1.getFloatValue(workingMemory, object1) >= extractor2
443:                            .getFloatValue(workingMemory, object2);
444:                }
445:
446:                public String toString() {
447:                    return "Float >=";
448:                }
449:            }
450:
451:            static class FloatMemberOfEvaluator extends BaseMemberOfEvaluator {
452:
453:                private static final long serialVersionUID = 400L;
454:                public final static Evaluator INSTANCE = new FloatMemberOfEvaluator();
455:
456:                private FloatMemberOfEvaluator() {
457:                    super (ValueType.PFLOAT_TYPE, Operator.MEMBEROF);
458:                }
459:
460:                public String toString() {
461:                    return "Float memberOf";
462:                }
463:            }
464:
465:            static class FloatNotMemberOfEvaluator extends
466:                    BaseNotMemberOfEvaluator {
467:
468:                private static final long serialVersionUID = 400L;
469:                public final static Evaluator INSTANCE = new FloatNotMemberOfEvaluator();
470:
471:                private FloatNotMemberOfEvaluator() {
472:                    super (ValueType.PFLOAT_TYPE, Operator.NOTMEMBEROF);
473:                }
474:
475:                public String toString() {
476:                    return "Float not memberOf";
477:                }
478:            }
479:
480:        }
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