Source Code Cross Referenced for BigIntegerFactory.java in  » Rule-Engine » drolls-Rule-Engine » org » drools » base » evaluators » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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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 java.math.BigInteger;
020:
021:        import org.drools.base.BaseEvaluator;
022:        import org.drools.base.ValueType;
023:        import org.drools.common.InternalWorkingMemory;
024:        import org.drools.rule.VariableRestriction.ObjectVariableContextEntry;
025:        import org.drools.rule.VariableRestriction.VariableContextEntry;
026:        import org.drools.spi.Evaluator;
027:        import org.drools.spi.Extractor;
028:        import org.drools.spi.FieldValue;
029:
030:        public class BigIntegerFactory implements  EvaluatorFactory {
031:
032:            private static final long serialVersionUID = 400L;
033:            private static EvaluatorFactory INSTANCE = new BigIntegerFactory();
034:
035:            private BigIntegerFactory() {
036:
037:            }
038:
039:            public static EvaluatorFactory getInstance() {
040:                if (BigIntegerFactory.INSTANCE == null) {
041:                    BigIntegerFactory.INSTANCE = new BigIntegerFactory();
042:                }
043:                return BigIntegerFactory.INSTANCE;
044:            }
045:
046:            public Evaluator getEvaluator(final Operator operator) {
047:                if (operator == Operator.EQUAL) {
048:                    return BigIntegerEqualEvaluator.INSTANCE;
049:                } else if (operator == Operator.NOT_EQUAL) {
050:                    return BigIntegerNotEqualEvaluator.INSTANCE;
051:                } else if (operator == Operator.LESS) {
052:                    return BigIntegerLessEvaluator.INSTANCE;
053:                } else if (operator == Operator.LESS_OR_EQUAL) {
054:                    return BigIntegerLessOrEqualEvaluator.INSTANCE;
055:                } else if (operator == Operator.GREATER) {
056:                    return BigIntegerGreaterEvaluator.INSTANCE;
057:                } else if (operator == Operator.GREATER_OR_EQUAL) {
058:                    return BigIntegerGreaterOrEqualEvaluator.INSTANCE;
059:                } else if (operator == Operator.MEMBEROF) {
060:                    return BigIntegerMemberOfEvaluator.INSTANCE;
061:                } else if (operator == Operator.NOTMEMBEROF) {
062:                    return BigIntegerNotMemberOfEvaluator.INSTANCE;
063:                } else {
064:                    throw new RuntimeException("Operator '" + operator
065:                            + "' does not exist for BigIntegerEvaluator");
066:                }
067:            }
068:
069:            static class BigIntegerEqualEvaluator extends BaseEvaluator {
070:                /**
071:                 * 
072:                 */
073:                private static final long serialVersionUID = 400L;
074:                public final static Evaluator INSTANCE = new BigIntegerEqualEvaluator();
075:
076:                private BigIntegerEqualEvaluator() {
077:                    super (ValueType.BIG_INTEGER_TYPE, Operator.EQUAL);
078:                }
079:
080:                public boolean evaluate(InternalWorkingMemory workingMemory,
081:                        final Extractor extractor, final Object object1,
082:                        final FieldValue object2) {
083:                    final Object value1 = extractor.getValue(workingMemory,
084:                            object1);
085:                    final Object value2 = object2.getValue();
086:                    if (value1 == null) {
087:                        return value2 == null;
088:                    }
089:                    return value1.equals(value2);
090:                }
091:
092:                public boolean evaluateCachedRight(
093:                        InternalWorkingMemory workingMemory,
094:                        final VariableContextEntry context, final Object left) {
095:                    final Object value = context.declaration.getExtractor()
096:                            .getValue(workingMemory, left);
097:                    if (value == null) {
098:                        return ((ObjectVariableContextEntry) context).right == null;
099:                    }
100:                    return value
101:                            .equals(((ObjectVariableContextEntry) context).right);
102:                }
103:
104:                public boolean evaluateCachedLeft(
105:                        InternalWorkingMemory workingMemory,
106:                        final VariableContextEntry context, final Object right) {
107:                    final Object value = context.extractor.getValue(
108:                            workingMemory, right);
109:                    if (((ObjectVariableContextEntry) context).left == null) {
110:                        return value == null;
111:                    }
112:                    return ((ObjectVariableContextEntry) context).left
113:                            .equals(value);
114:                }
115:
116:                public boolean evaluate(InternalWorkingMemory workingMemory,
117:                        final Extractor extractor1, final Object object1,
118:                        final Extractor extractor2, final Object object2) {
119:                    final Object value1 = extractor1.getValue(workingMemory,
120:                            object1);
121:                    final Object value2 = extractor2.getValue(workingMemory,
122:                            object2);
123:                    if (value1 == null) {
124:                        return value2 == null;
125:                    }
126:                    return value1.equals(value2);
127:                }
128:
129:                public String toString() {
130:                    return "BigInteger ==";
131:                }
132:            }
133:
134:            static class BigIntegerNotEqualEvaluator extends BaseEvaluator {
135:                /**
136:                 * 
137:                 */
138:                private static final long serialVersionUID = 400L;
139:                public final static Evaluator INSTANCE = new BigIntegerNotEqualEvaluator();
140:
141:                private BigIntegerNotEqualEvaluator() {
142:                    super (ValueType.BIG_INTEGER_TYPE, Operator.NOT_EQUAL);
143:                }
144:
145:                public boolean evaluate(InternalWorkingMemory workingMemory,
146:                        final Extractor extractor, final Object object1,
147:                        final FieldValue object2) {
148:                    final Object value1 = extractor.getValue(workingMemory,
149:                            object1);
150:                    final Object value2 = object2.getValue();
151:                    if (value1 == null) {
152:                        return value2 != null;
153:                    }
154:                    return !value1.equals(value2);
155:                }
156:
157:                public boolean evaluateCachedRight(
158:                        InternalWorkingMemory workingMemory,
159:                        final VariableContextEntry context, final Object left) {
160:                    final Object value = context.declaration.getExtractor()
161:                            .getValue(workingMemory, left);
162:                    if (value == null) {
163:                        return ((ObjectVariableContextEntry) context).right != null;
164:                    }
165:                    return !value
166:                            .equals(((ObjectVariableContextEntry) context).right);
167:                }
168:
169:                public boolean evaluateCachedLeft(
170:                        InternalWorkingMemory workingMemory,
171:                        final VariableContextEntry context, final Object right) {
172:                    final Object value = context.extractor.getValue(
173:                            workingMemory, right);
174:                    if (((ObjectVariableContextEntry) context).left == null) {
175:                        return value != null;
176:                    }
177:                    return !((ObjectVariableContextEntry) context).left
178:                            .equals(value);
179:                }
180:
181:                public boolean evaluate(InternalWorkingMemory workingMemory,
182:                        final Extractor extractor1, final Object object1,
183:                        final Extractor extractor2, final Object object2) {
184:                    final Object value1 = extractor1.getValue(workingMemory,
185:                            object1);
186:                    final Object value2 = extractor2.getValue(workingMemory,
187:                            object2);
188:                    if (value1 == null) {
189:                        return value2 != null;
190:                    }
191:                    return !value1.equals(value2);
192:                }
193:
194:                public String toString() {
195:                    return "BigInteger !=";
196:                }
197:            }
198:
199:            static class BigIntegerLessEvaluator extends BaseEvaluator {
200:                /**
201:                 * 
202:                 */
203:                private static final long serialVersionUID = 400L;
204:                public final static Evaluator INSTANCE = new BigIntegerLessEvaluator();
205:
206:                private BigIntegerLessEvaluator() {
207:                    super (ValueType.BIG_INTEGER_TYPE, Operator.LESS);
208:                }
209:
210:                public boolean evaluate(InternalWorkingMemory workingMemory,
211:                        final Extractor extractor, final Object object1,
212:                        final FieldValue object2) {
213:                    if (extractor.isNullValue(workingMemory, object1)) {
214:                        return false;
215:                    }
216:                    final BigInteger comp = (BigInteger) extractor.getValue(
217:                            workingMemory, object1);
218:                    return comp.compareTo((BigInteger) object2.getValue()) < 0;
219:                }
220:
221:                public boolean evaluateCachedRight(
222:                        InternalWorkingMemory workingMemory,
223:                        final VariableContextEntry context, final Object left) {
224:                    if (context.rightNull) {
225:                        return false;
226:                    }
227:                    final BigInteger comp = (BigInteger) ((ObjectVariableContextEntry) context).right;
228:                    return comp.compareTo((BigInteger) context.declaration
229:                            .getExtractor().getValue(workingMemory, left)) < 0;
230:                }
231:
232:                public boolean evaluateCachedLeft(
233:                        InternalWorkingMemory workingMemory,
234:                        final VariableContextEntry context, final Object right) {
235:                    if (context.extractor.isNullValue(workingMemory, right)) {
236:                        return false;
237:                    }
238:                    final BigInteger comp = (BigInteger) context.extractor
239:                            .getValue(workingMemory, right);
240:                    return comp
241:                            .compareTo((BigInteger) ((ObjectVariableContextEntry) context).left) < 0;
242:                }
243:
244:                public boolean evaluate(InternalWorkingMemory workingMemory,
245:                        final Extractor extractor1, final Object object1,
246:                        final Extractor extractor2, final Object object2) {
247:                    if (extractor1.isNullValue(workingMemory, object1)) {
248:                        return false;
249:                    }
250:                    final BigInteger comp = (BigInteger) extractor1.getValue(
251:                            workingMemory, object1);
252:                    return comp.compareTo((BigInteger) extractor2.getValue(
253:                            workingMemory, object2)) < 0;
254:                }
255:
256:                public String toString() {
257:                    return "BigInteger <";
258:                }
259:            }
260:
261:            static class BigIntegerLessOrEqualEvaluator extends BaseEvaluator {
262:                /**
263:                 * 
264:                 */
265:                private static final long serialVersionUID = 400L;
266:                public final static Evaluator INSTANCE = new BigIntegerLessOrEqualEvaluator();
267:
268:                private BigIntegerLessOrEqualEvaluator() {
269:                    super (ValueType.BIG_INTEGER_TYPE, Operator.LESS_OR_EQUAL);
270:                }
271:
272:                public boolean evaluate(InternalWorkingMemory workingMemory,
273:                        final Extractor extractor, final Object object1,
274:                        final FieldValue object2) {
275:                    if (extractor.isNullValue(workingMemory, object1)) {
276:                        return false;
277:                    }
278:                    final BigInteger comp = (BigInteger) extractor.getValue(
279:                            workingMemory, object1);
280:                    return comp.compareTo((BigInteger) object2.getValue()) <= 0;
281:                }
282:
283:                public boolean evaluateCachedRight(
284:                        InternalWorkingMemory workingMemory,
285:                        final VariableContextEntry context, final Object left) {
286:                    if (context.rightNull) {
287:                        return false;
288:                    }
289:                    final BigInteger comp = (BigInteger) ((ObjectVariableContextEntry) context).right;
290:                    return comp.compareTo((BigInteger) context.declaration
291:                            .getExtractor().getValue(workingMemory, left)) <= 0;
292:                }
293:
294:                public boolean evaluateCachedLeft(
295:                        InternalWorkingMemory workingMemory,
296:                        final VariableContextEntry context, final Object right) {
297:                    if (context.extractor.isNullValue(workingMemory, right)) {
298:                        return false;
299:                    }
300:                    final BigInteger comp = (BigInteger) context.extractor
301:                            .getValue(workingMemory, right);
302:                    return comp
303:                            .compareTo((BigInteger) ((ObjectVariableContextEntry) context).left) <= 0;
304:                }
305:
306:                public boolean evaluate(InternalWorkingMemory workingMemory,
307:                        final Extractor extractor1, final Object object1,
308:                        final Extractor extractor2, final Object object2) {
309:                    if (extractor1.isNullValue(workingMemory, object1)) {
310:                        return false;
311:                    }
312:                    final BigInteger comp = (BigInteger) extractor1.getValue(
313:                            workingMemory, object1);
314:                    return comp.compareTo((BigInteger) extractor2.getValue(
315:                            workingMemory, object2)) <= 0;
316:                }
317:
318:                public String toString() {
319:                    return "BigInteger <=";
320:                }
321:            }
322:
323:            static class BigIntegerGreaterEvaluator extends BaseEvaluator {
324:                /**
325:                 * 
326:                 */
327:                private static final long serialVersionUID = 400L;
328:                public final static Evaluator INSTANCE = new BigIntegerGreaterEvaluator();
329:
330:                private BigIntegerGreaterEvaluator() {
331:                    super (ValueType.BIG_INTEGER_TYPE, Operator.GREATER);
332:                }
333:
334:                public boolean evaluate(InternalWorkingMemory workingMemory,
335:                        final Extractor extractor, final Object object1,
336:                        final FieldValue object2) {
337:                    if (extractor.isNullValue(workingMemory, object1)) {
338:                        return false;
339:                    }
340:                    final BigInteger comp = (BigInteger) extractor.getValue(
341:                            workingMemory, object1);
342:                    return comp.compareTo((BigInteger) object2.getValue()) > 0;
343:                }
344:
345:                public boolean evaluateCachedRight(
346:                        InternalWorkingMemory workingMemory,
347:                        final VariableContextEntry context, final Object left) {
348:                    if (context.rightNull) {
349:                        return false;
350:                    }
351:                    final BigInteger comp = (BigInteger) ((ObjectVariableContextEntry) context).right;
352:                    return comp.compareTo((BigInteger) context.declaration
353:                            .getExtractor().getValue(workingMemory, left)) > 0;
354:                }
355:
356:                public boolean evaluateCachedLeft(
357:                        InternalWorkingMemory workingMemory,
358:                        final VariableContextEntry context, final Object right) {
359:                    if (context.extractor.isNullValue(workingMemory, right)) {
360:                        return false;
361:                    }
362:                    final BigInteger comp = (BigInteger) context.extractor
363:                            .getValue(workingMemory, right);
364:                    return comp
365:                            .compareTo((BigInteger) ((ObjectVariableContextEntry) context).left) > 0;
366:                }
367:
368:                public boolean evaluate(InternalWorkingMemory workingMemory,
369:                        final Extractor extractor1, final Object object1,
370:                        final Extractor extractor2, final Object object2) {
371:                    if (extractor1.isNullValue(workingMemory, object1)) {
372:                        return false;
373:                    }
374:                    final BigInteger comp = (BigInteger) extractor1.getValue(
375:                            workingMemory, object1);
376:                    return comp.compareTo((BigInteger) extractor2.getValue(
377:                            workingMemory, object2)) > 0;
378:                }
379:
380:                public String toString() {
381:                    return "BigInteger >";
382:                }
383:            }
384:
385:            static class BigIntegerGreaterOrEqualEvaluator extends
386:                    BaseEvaluator {
387:                /**
388:                 * 
389:                 */
390:                private static final long serialVersionUID = 400L;
391:                private final static Evaluator INSTANCE = new BigIntegerGreaterOrEqualEvaluator();
392:
393:                private BigIntegerGreaterOrEqualEvaluator() {
394:                    super (ValueType.BIG_INTEGER_TYPE, Operator.GREATER_OR_EQUAL);
395:                }
396:
397:                public boolean evaluate(InternalWorkingMemory workingMemory,
398:                        final Extractor extractor, final Object object1,
399:                        final FieldValue object2) {
400:                    if (extractor.isNullValue(workingMemory, object1)) {
401:                        return false;
402:                    }
403:                    final BigInteger comp = (BigInteger) extractor.getValue(
404:                            workingMemory, object1);
405:                    return comp.compareTo((BigInteger) object2.getValue()) >= 0;
406:                }
407:
408:                public boolean evaluateCachedRight(
409:                        InternalWorkingMemory workingMemory,
410:                        final VariableContextEntry context, final Object left) {
411:                    if (context.rightNull) {
412:                        return false;
413:                    }
414:                    final BigInteger comp = (BigInteger) ((ObjectVariableContextEntry) context).right;
415:                    return comp.compareTo((BigInteger) context.declaration
416:                            .getExtractor().getValue(workingMemory, left)) >= 0;
417:                }
418:
419:                public boolean evaluateCachedLeft(
420:                        InternalWorkingMemory workingMemory,
421:                        final VariableContextEntry context, final Object right) {
422:                    if (context.extractor.isNullValue(workingMemory, right)) {
423:                        return false;
424:                    }
425:                    final BigInteger comp = (BigInteger) context.extractor
426:                            .getValue(workingMemory, right);
427:                    return comp
428:                            .compareTo((BigInteger) ((ObjectVariableContextEntry) context).left) >= 0;
429:                }
430:
431:                public boolean evaluate(InternalWorkingMemory workingMemory,
432:                        final Extractor extractor1, final Object object1,
433:                        final Extractor extractor2, final Object object2) {
434:                    if (extractor1.isNullValue(workingMemory, object1)) {
435:                        return false;
436:                    }
437:                    final BigInteger comp = (BigInteger) extractor1.getValue(
438:                            workingMemory, object1);
439:                    return comp.compareTo((BigInteger) extractor2.getValue(
440:                            workingMemory, object2)) >= 0;
441:                }
442:
443:                public String toString() {
444:                    return "BigInteger >=";
445:                }
446:            }
447:
448:            static class BigIntegerMemberOfEvaluator extends
449:                    BaseMemberOfEvaluator {
450:
451:                private static final long serialVersionUID = 400L;
452:                public final static Evaluator INSTANCE = new BigIntegerMemberOfEvaluator();
453:
454:                private BigIntegerMemberOfEvaluator() {
455:                    super (ValueType.BIG_INTEGER_TYPE, Operator.MEMBEROF);
456:                }
457:
458:                public String toString() {
459:                    return "BigInteger memberOf";
460:                }
461:            }
462:
463:            static class BigIntegerNotMemberOfEvaluator extends
464:                    BaseNotMemberOfEvaluator {
465:                /**
466:                 * 
467:                 */
468:                private static final long serialVersionUID = 400L;
469:                public final static Evaluator INSTANCE = new BigIntegerNotMemberOfEvaluator();
470:
471:                private BigIntegerNotMemberOfEvaluator() {
472:                    super (ValueType.BIG_INTEGER_TYPE, Operator.NOTMEMBEROF);
473:                }
474:
475:                public String toString() {
476:                    return "BigInteger not memberOf";
477:                }
478:            }
479:
480:        }
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