Source Code Cross Referenced for JRCalculator.java in  » Report » jasperreports-2.0.1 » net » sf » jasperreports » engine » fill » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » jasperreports 2.0.1 » net.sf.jasperreports.engine.fill 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * ============================================================================
003:         * GNU Lesser General Public License
004:         * ============================================================================
005:         *
006:         * JasperReports - Free Java report-generating library.
007:         * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
008:         * 
009:         * This library is free software; you can redistribute it and/or
010:         * modify it under the terms of the GNU Lesser General Public
011:         * License as published by the Free Software Foundation; either
012:         * version 2.1 of the License, or (at your option) any later version.
013:         * 
014:         * This library is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
017:         * Lesser General Public License for more details.
018:         * 
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
022:         * 
023:         * JasperSoft Corporation
024:         * 303 Second Street, Suite 450 North
025:         * San Francisco, CA 94107
026:         * http://www.jaspersoft.com
027:         */
028:
029:        /*
030:         * Contributors:
031:         * Peter Severin - peter_p_s@users.sourceforge.net 
032:         */
033:        package net.sf.jasperreports.engine.fill;
034:
035:        import java.util.Map;
036:
037:        import net.sf.jasperreports.engine.JRException;
038:        import net.sf.jasperreports.engine.JRExpression;
039:        import net.sf.jasperreports.engine.JRVariable;
040:
041:        /**
042:         * @author Teodor Danciu (teodord@users.sourceforge.net)
043:         * @version $Id: JRCalculator.java 1470 2006-11-08 16:07:35Z teodord $
044:         */
045:        public class JRCalculator implements  JRFillExpressionEvaluator {
046:
047:            /**
048:             *
049:             */
050:            protected Map parsm = null;
051:            protected Map fldsm = null;
052:            protected Map varsm = null;
053:            protected JRFillVariable[] variables = null;
054:            protected JRFillGroup[] groups = null;
055:            protected JRFillElementDataset[] datasets = null;
056:
057:            private JRFillVariable pageNumber = null;
058:            private JRFillVariable columnNumber = null;
059:
060:            /**
061:             * The expression evaluator
062:             */
063:            private final JREvaluator evaluator;
064:
065:            /**
066:             * Creates a calculator using an expression evaluator.
067:             * 
068:             * @param evaluator the expression evaluator
069:             */
070:            protected JRCalculator(JREvaluator evaluator) {
071:                this .evaluator = evaluator;
072:            }
073:
074:            /**
075:             * Initializes the calculator.
076:             * 
077:             * @param dataset the dataset this calculator is used for
078:             * @throws JRException
079:             */
080:            protected void init(JRFillDataset dataset) throws JRException {
081:                parsm = dataset.parametersMap;
082:                fldsm = dataset.fieldsMap;
083:                varsm = dataset.variablesMap;
084:                variables = dataset.variables;
085:                groups = dataset.groups;
086:                datasets = dataset.elementDatasets;
087:
088:                pageNumber = (JRFillVariable) varsm.get(JRVariable.PAGE_NUMBER);
089:                columnNumber = (JRFillVariable) varsm
090:                        .get(JRVariable.COLUMN_NUMBER);
091:
092:                byte whenResourceMissingType = dataset
093:                        .getWhenResourceMissingType();
094:                evaluator.init(parsm, fldsm, varsm, whenResourceMissingType);
095:            }
096:
097:            /**
098:             *
099:             */
100:            public JRFillVariable getPageNumber() {
101:                return pageNumber;
102:            }
103:
104:            /**
105:             *
106:             */
107:            public JRFillVariable getColumnNumber() {
108:                return columnNumber;
109:            }
110:
111:            /**
112:             *
113:             */
114:            public void calculateVariables() throws JRException {
115:                if (variables != null && variables.length > 0) {
116:                    for (int i = 0; i < variables.length; i++) {
117:                        JRFillVariable variable = variables[i];
118:                        Object expressionValue = evaluate(variable
119:                                .getExpression());
120:                        Object newValue = variable.getIncrementer()
121:                                .increment(
122:                                        variable,
123:                                        expressionValue,
124:                                        AbstractValueProvider
125:                                                .getCurrentValueProvider());
126:                        variable.setValue(newValue);
127:                        variable.setInitialized(false);
128:
129:                        if (variable.getIncrementType() == JRVariable.RESET_TYPE_NONE) {
130:                            variable.setIncrementedValue(variable.getValue());
131:                        }
132:                    }
133:                }
134:
135:                if (datasets != null && datasets.length > 0) {
136:                    for (int i = 0; i < datasets.length; i++) {
137:                        JRFillElementDataset elementDataset = datasets[i];
138:                        elementDataset.evaluate(this );
139:
140:                        if (elementDataset.getIncrementType() == JRVariable.RESET_TYPE_NONE) {
141:                            elementDataset.increment();
142:                        }
143:                    }
144:                }
145:            }
146:
147:            /**
148:             *
149:             */
150:            public void estimateVariables() throws JRException {
151:                if (variables != null && variables.length > 0) {
152:                    JRFillVariable variable = null;
153:                    Object expressionValue = null;
154:                    Object newValue = null;
155:
156:                    for (int i = 0; i < variables.length; i++) {
157:                        variable = variables[i];
158:                        expressionValue = evaluateEstimated(variable
159:                                .getExpression());
160:                        newValue = variable.getIncrementer().increment(
161:                                variable,
162:                                expressionValue,
163:                                AbstractValueProvider
164:                                        .getEstimatedValueProvider());
165:                        variable.setEstimatedValue(newValue);
166:                        //variable.setInitialized(false);
167:                    }
168:                }
169:            }
170:
171:            /**
172:             * Determines group breaks based on estimated report values. 
173:             * <p>
174:             * {@link #estimateVariables() estimateVariables()} needs to be called prior to this method.
175:             * </p>
176:             * 
177:             * @throws JRException
178:             */
179:            public void estimateGroupRuptures() throws JRException {
180:                JRFillGroup group = null;
181:                Object oldValue = null;
182:                Object estimatedValue = null;
183:                boolean groupHasChanged = false;
184:                boolean isTopLevelChange = false;
185:                if (groups != null && groups.length > 0) {
186:                    for (int i = 0; i < groups.length; i++) {
187:                        group = groups[i];
188:
189:                        isTopLevelChange = false;
190:
191:                        if (!groupHasChanged) {
192:                            oldValue = evaluateOld(group.getExpression());
193:                            estimatedValue = evaluateEstimated(group
194:                                    .getExpression());
195:
196:                            if ((oldValue == null && estimatedValue != null)
197:                                    || (oldValue != null && !oldValue
198:                                            .equals(estimatedValue))) {
199:                                groupHasChanged = true;
200:                                isTopLevelChange = true;
201:                            }
202:                        }
203:
204:                        group.setHasChanged(groupHasChanged);
205:                        group.setTopLevelChange(isTopLevelChange);
206:                    }
207:                }
208:            }
209:
210:            /**
211:             *
212:             */
213:            public void initializeVariables(byte resetType) throws JRException {
214:                if (variables != null && variables.length > 0) {
215:                    for (int i = 0; i < variables.length; i++) {
216:                        incrementVariable(variables[i], resetType);
217:                        initializeVariable(variables[i], resetType);
218:                    }
219:                }
220:
221:                if (datasets != null && datasets.length > 0) {
222:                    for (int i = 0; i < datasets.length; i++) {
223:                        incrementDataset(datasets[i], resetType);
224:                        initializeDataset(datasets[i], resetType);
225:                    }
226:                }
227:            }
228:
229:            /**
230:             *
231:             */
232:            private void incrementVariable(JRFillVariable variable,
233:                    byte incrementType) {
234:                if (variable.getIncrementType() != JRVariable.RESET_TYPE_NONE) {
235:                    boolean toIncrement = false;
236:                    switch (incrementType) {
237:                    case JRVariable.RESET_TYPE_REPORT: {
238:                        toIncrement = true;
239:                        break;
240:                    }
241:                    case JRVariable.RESET_TYPE_PAGE: {
242:                        toIncrement = (variable.getIncrementType() == JRVariable.RESET_TYPE_PAGE || variable
243:                                .getIncrementType() == JRVariable.RESET_TYPE_COLUMN);
244:                        break;
245:                    }
246:                    case JRVariable.RESET_TYPE_COLUMN: {
247:                        toIncrement = (variable.getIncrementType() == JRVariable.RESET_TYPE_COLUMN);
248:                        break;
249:                    }
250:                    case JRVariable.RESET_TYPE_GROUP: {
251:                        if (variable.getIncrementType() == JRVariable.RESET_TYPE_GROUP) {
252:                            JRFillGroup group = (JRFillGroup) variable
253:                                    .getIncrementGroup();
254:                            toIncrement = group.hasChanged();
255:                        }
256:                        break;
257:                    }
258:                    case JRVariable.RESET_TYPE_NONE:
259:                    default: {
260:                    }
261:                    }
262:
263:                    if (toIncrement) {
264:                        variable.setIncrementedValue(variable.getValue());
265:                        //				variable.setValue(
266:                        //					evaluate(variable.getInitialValueExpression())
267:                        //					);
268:                        //				variable.setInitialized(true);
269:                    }
270:                } else {
271:                    variable.setIncrementedValue(variable.getValue());
272:                    //			variable.setValue(
273:                    //				evaluate(variable.getExpression())
274:                    //				);
275:                }
276:            }
277:
278:            /**
279:             *
280:             */
281:            private void incrementDataset(JRFillElementDataset elementDataset,
282:                    byte incrementType) {
283:                if (elementDataset.getIncrementType() != JRVariable.RESET_TYPE_NONE) {
284:                    boolean toIncrement = false;
285:                    switch (incrementType) {
286:                    case JRVariable.RESET_TYPE_REPORT: {
287:                        toIncrement = true;
288:                        break;
289:                    }
290:                    case JRVariable.RESET_TYPE_PAGE: {
291:                        toIncrement = (elementDataset.getIncrementType() == JRVariable.RESET_TYPE_PAGE || elementDataset
292:                                .getIncrementType() == JRVariable.RESET_TYPE_COLUMN);
293:                        break;
294:                    }
295:                    case JRVariable.RESET_TYPE_COLUMN: {
296:                        toIncrement = (elementDataset.getIncrementType() == JRVariable.RESET_TYPE_COLUMN);
297:                        break;
298:                    }
299:                    case JRVariable.RESET_TYPE_GROUP: {
300:                        if (elementDataset.getIncrementType() == JRVariable.RESET_TYPE_GROUP) {
301:                            JRFillGroup group = (JRFillGroup) elementDataset
302:                                    .getIncrementGroup();
303:                            toIncrement = group.hasChanged();
304:                        }
305:                        break;
306:                    }
307:                    case JRVariable.RESET_TYPE_NONE:
308:                    default: {
309:                    }
310:                    }
311:
312:                    if (toIncrement) {
313:                        elementDataset.increment();
314:                    }
315:                }
316:            }
317:
318:            /**
319:             *
320:             */
321:            private void initializeVariable(JRFillVariable variable,
322:                    byte resetType) throws JRException {
323:                //if (jrVariable.getCalculation() != JRVariable.CALCULATION_NOTHING)
324:                if (variable.getResetType() != JRVariable.RESET_TYPE_NONE) {
325:                    boolean toInitialize = false;
326:                    switch (resetType) {
327:                    case JRVariable.RESET_TYPE_REPORT: {
328:                        toInitialize = true;
329:                        break;
330:                    }
331:                    case JRVariable.RESET_TYPE_PAGE: {
332:                        toInitialize = (variable.getResetType() == JRVariable.RESET_TYPE_PAGE || variable
333:                                .getResetType() == JRVariable.RESET_TYPE_COLUMN);
334:                        break;
335:                    }
336:                    case JRVariable.RESET_TYPE_COLUMN: {
337:                        toInitialize = (variable.getResetType() == JRVariable.RESET_TYPE_COLUMN);
338:                        break;
339:                    }
340:                    case JRVariable.RESET_TYPE_GROUP: {
341:                        if (variable.getResetType() == JRVariable.RESET_TYPE_GROUP) {
342:                            JRFillGroup group = (JRFillGroup) variable
343:                                    .getResetGroup();
344:                            toInitialize = group.hasChanged();
345:                        }
346:                        break;
347:                    }
348:                    case JRVariable.RESET_TYPE_NONE:
349:                    default: {
350:                    }
351:                    }
352:
353:                    if (toInitialize) {
354:                        variable.setValue(evaluate(variable
355:                                .getInitialValueExpression()));
356:                        variable.setInitialized(true);
357:                        variable.setIncrementedValue(null);
358:                    }
359:                } else {
360:                    variable.setValue(evaluate(variable.getExpression()));
361:                    variable.setIncrementedValue(variable.getValue());
362:                }
363:            }
364:
365:            /**
366:             *
367:             */
368:            private void initializeDataset(JRFillElementDataset elementDataset,
369:                    byte resetType) {
370:                boolean toInitialize = false;
371:                switch (resetType) {
372:                case JRVariable.RESET_TYPE_REPORT: {
373:                    toInitialize = true;
374:                    break;
375:                }
376:                case JRVariable.RESET_TYPE_PAGE: {
377:                    toInitialize = (elementDataset.getResetType() == JRVariable.RESET_TYPE_PAGE || elementDataset
378:                            .getResetType() == JRVariable.RESET_TYPE_COLUMN);
379:                    break;
380:                }
381:                case JRVariable.RESET_TYPE_COLUMN: {
382:                    toInitialize = (elementDataset.getResetType() == JRVariable.RESET_TYPE_COLUMN);
383:                    break;
384:                }
385:                case JRVariable.RESET_TYPE_GROUP: {
386:                    if (elementDataset.getResetType() == JRVariable.RESET_TYPE_GROUP) {
387:                        JRFillGroup group = (JRFillGroup) elementDataset
388:                                .getResetGroup();
389:                        toInitialize = group.hasChanged();
390:                    }
391:                    break;
392:                }
393:                case JRVariable.RESET_TYPE_NONE:
394:                default: {
395:                }
396:                }
397:
398:                if (toInitialize) {
399:                    elementDataset.initialize();
400:                }
401:            }
402:
403:            /**
404:             *
405:             */
406:            public Object evaluate(JRExpression expression, byte evaluationType)
407:                    throws JRException {
408:                Object value = null;
409:
410:                switch (evaluationType) {
411:                case JRExpression.EVALUATION_OLD: {
412:                    value = evaluateOld(expression);
413:                    break;
414:                }
415:                case JRExpression.EVALUATION_ESTIMATED: {
416:                    value = evaluateEstimated(expression);
417:                    break;
418:                }
419:                case JRExpression.EVALUATION_DEFAULT:
420:                default: {
421:                    value = evaluate(expression);
422:                    break;
423:                }
424:                }
425:
426:                return value;
427:            }
428:
429:            /**
430:             *
431:             */
432:            public Object evaluateOld(JRExpression expression)
433:                    throws JRExpressionEvalException {
434:                return evaluator.evaluateOld(expression);
435:            }
436:
437:            /**
438:             *
439:             */
440:            public Object evaluateEstimated(JRExpression expression)
441:                    throws JRExpressionEvalException {
442:                return evaluator.evaluateEstimated(expression);
443:            }
444:
445:            /**
446:             *
447:             */
448:            public Object evaluate(JRExpression expression)
449:                    throws JRExpressionEvalException {
450:                return evaluator.evaluate(expression);
451:            }
452:        }
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