Source Code Cross Referenced for FastGlobalView.java in  » Report » pentaho-report » org » jfree » report » states » datarow » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » pentaho report » org.jfree.report.states.datarow 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * ===========================================
003:         * JFreeReport : a free Java reporting library
004:         * ===========================================
005:         *
006:         * Project Info:  http://reporting.pentaho.org/
007:         *
008:         * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
009:         *
010:         * This library is free software; you can redistribute it and/or modify it under the terms
011:         * of the GNU Lesser General Public License as published by the Free Software Foundation;
012:         * either 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, but WITHOUT ANY WARRANTY;
015:         * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016:         * See the GNU Lesser General Public License for more details.
017:         *
018:         * You should have received a copy of the GNU Lesser General Public License along with this
019:         * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020:         * Boston, MA 02111-1307, USA.
021:         *
022:         * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023:         * in the United States and other countries.]
024:         *
025:         * ------------
026:         * FastGlobalView.java
027:         * ------------
028:         * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
029:         */package org.jfree.report.states.datarow;
030:
031:        import java.util.Arrays;
032:        import java.util.HashMap;
033:        import java.util.HashSet;
034:
035:        import org.jfree.report.DataRow;
036:        import org.jfree.report.JFreeReportBoot;
037:        import org.jfree.report.util.IntegerCache;
038:        import org.jfree.util.Log;
039:        import org.jfree.util.ObjectUtilities;
040:
041:        /**
042:         * Creation-Date: 10.08.2007, 14:07:32
043:         *
044:         * @author Thomas Morgner
045:         */
046:        public final class FastGlobalView implements  DataRow {
047:            private HashSet invalidColumns;
048:            private boolean modifiableNameCache;
049:            private HashMap nameCache;
050:            private String[] columnNames;
051:            private Boolean[] columnChanged;
052:            private Object[] columnValue;
053:            private Object[] columnOldValue;
054:            private int[] columnPrev;
055:            private int length;
056:            private static final boolean DEBUG = false;
057:            private boolean warnInvalidColumns;
058:
059:            public FastGlobalView(final FastGlobalView parent) {
060:                if (parent.modifiableNameCache) {
061:                    this .nameCache = (HashMap) parent.nameCache.clone();
062:                    this .modifiableNameCache = false;
063:                    this .columnNames = (String[]) parent.columnNames.clone();
064:                } else {
065:                    this .nameCache = parent.nameCache;
066:                    this .columnNames = parent.columnNames;
067:                    this .modifiableNameCache = false;
068:                }
069:                this .columnChanged = (Boolean[]) parent.columnChanged.clone();
070:                this .columnValue = (Object[]) parent.columnValue.clone();
071:                this .columnOldValue = (Object[]) parent.columnOldValue.clone();
072:                this .columnPrev = (int[]) parent.columnPrev.clone();
073:                this .length = parent.length;
074:                this .warnInvalidColumns = parent.warnInvalidColumns;
075:                this .invalidColumns = parent.invalidColumns;
076:            }
077:
078:            public FastGlobalView() {
079:                this .warnInvalidColumns = "true".equals(JFreeReportBoot
080:                        .getInstance().getGlobalConfig().getConfigProperty(
081:                                "org.jfree.report.WarnInvalidColumns"));
082:                if (warnInvalidColumns) {
083:                    this .invalidColumns = new HashSet();
084:                }
085:                this .nameCache = new HashMap();
086:                this .modifiableNameCache = true;
087:                this .columnNames = new String[20];
088:                this .columnChanged = new Boolean[20];
089:                this .columnValue = new Object[20];
090:                this .columnOldValue = new Object[20];
091:                this .columnPrev = new int[20];
092:            }
093:
094:            public Object get(final int col) {
095:                if (col < 0 || col >= length) {
096:                    throw new IndexOutOfBoundsException("Column-Index " + col
097:                            + " is invalid.");
098:                }
099:                return columnValue[col];
100:            }
101:
102:            public Object get(final String col) throws IllegalStateException {
103:                final int idx = findColumn(col);
104:                if (idx < 0) {
105:                    if (warnInvalidColumns) {
106:                        if (invalidColumns.add(col)) {
107:                            Log
108:                                    .warn("Warning: Data-Set does not contain a column with name '"
109:                                            + col + "'");
110:                        }
111:                    }
112:                    return null;
113:                }
114:                return get(idx);
115:            }
116:
117:            public String getColumnName(final int col) {
118:                if (col < 0 || col >= length) {
119:                    throw new IndexOutOfBoundsException("Column-Index " + col
120:                            + " is invalid.");
121:                }
122:                return columnNames[col];
123:            }
124:
125:            public int findColumn(final String name) {
126:                final Integer o = (Integer) nameCache.get(name);
127:                if (o == null) {
128:                    return -1;
129:                }
130:                return o.intValue();
131:            }
132:
133:            public int getColumnCount() {
134:                return length;
135:            }
136:
137:            public boolean isChanged(final String name) {
138:                final int idx = findColumn(name);
139:                if (idx < 0) {
140:                    if (warnInvalidColumns) {
141:                        if (invalidColumns.add(name)) {
142:                            Log
143:                                    .warn("Warning: Data-Set does not contain a column with name '"
144:                                            + name + "'");
145:                        }
146:                    }
147:                    return false;
148:                }
149:                return isChanged(idx);
150:            }
151:
152:            public boolean isChanged(final int col) {
153:                if (col < 0 || col >= length) {
154:                    throw new IndexOutOfBoundsException("Column-Index " + col
155:                            + " is invalid.");
156:                }
157:                final Boolean val = columnChanged[col];
158:                if (val != null) {
159:                    return val.booleanValue();
160:                }
161:                final Boolean computedFlag = computeChangedFlag(col);
162:                columnChanged[col] = computedFlag;
163:                return computedFlag.booleanValue();
164:            }
165:
166:            private Boolean computeChangedFlag(final int col) {
167:                Log
168:                        .debug("Computing these values should be no longer necessary.");
169:                // todo
170:                return Boolean.FALSE;
171:            }
172:
173:            public FastGlobalView derive() {
174:                return new FastGlobalView(this );
175:            }
176:
177:            public FastGlobalView advance() {
178:                final FastGlobalView advanced = new FastGlobalView(this );
179:                Arrays.fill(advanced.columnChanged, null);
180:                System.arraycopy(advanced.columnValue, 0,
181:                        advanced.columnOldValue, 0, length);
182:                return advanced;
183:            }
184:
185:            public void removeColumn(final String name) {
186:                final Integer o = (Integer) nameCache.get(name);
187:                if (o == null) {
188:                    return;
189:                }
190:                final int idx = o.intValue();
191:                if (DEBUG) {
192:                    Log.debug("Removing column " + name + " (Length: " + length
193:                            + " NameCache: " + nameCache.size() + ", Idx: "
194:                            + idx);
195:                }
196:
197:                if (modifiableNameCache == false) {
198:                    this .columnNames = (String[]) columnNames.clone();
199:                    this .nameCache = (HashMap) nameCache.clone();
200:                    this .modifiableNameCache = true;
201:                }
202:
203:                if (idx == (length - 1)) {
204:                    columnChanged[idx] = null;
205:                    columnNames[idx] = null;
206:                    columnValue[idx] = null;
207:                    if (columnPrev[idx] == -1) {
208:                        nameCache.remove(name);
209:                    } else {
210:                        nameCache.put(name, IntegerCache
211:                                .getInteger(columnPrev[idx]));
212:                    }
213:                    // thats the easy case ..
214:                    length -= 1;
215:                    return;
216:                }
217:
218:                if (DEBUG) {
219:                    Log.warn("Out of order removeal of a column: " + name);
220:                }
221:
222:                if (columnPrev[idx] == -1) {
223:                    nameCache.remove(name);
224:                } else {
225:                    nameCache.put(name, IntegerCache
226:                            .getInteger(columnPrev[idx]));
227:                }
228:
229:                final int moveStartIdx = idx + 1;
230:                final int moveLength = length - moveStartIdx;
231:                System.arraycopy(columnNames, moveStartIdx, columnNames, idx,
232:                        moveLength);
233:                System.arraycopy(columnChanged, moveStartIdx, columnChanged,
234:                        idx, moveLength);
235:                System.arraycopy(columnOldValue, moveStartIdx, columnOldValue,
236:                        idx, moveLength);
237:                System.arraycopy(columnValue, moveStartIdx, columnValue, idx,
238:                        moveLength);
239:                System.arraycopy(columnPrev, moveStartIdx, columnPrev, idx,
240:                        moveLength);
241:                columnNames[length - 1] = null;
242:                columnChanged[length - 1] = null;
243:                columnOldValue[length - 1] = null;
244:                columnPrev[length - 1] = 0;
245:
246:                // Now it gets expensive: Rebuild the namecache ..
247:                final int newLength = moveLength + idx;
248:                nameCache.clear();
249:                for (int i = 0; i < newLength; i++) {
250:                    final String columnName = columnNames[i];
251:                    final Integer oldVal = (Integer) nameCache.get(columnName);
252:                    nameCache.put(columnName, IntegerCache.getInteger(i));
253:                    if (oldVal != null) {
254:                        columnPrev[i] = oldVal.intValue();
255:                    } else {
256:                        columnPrev[i] = -1;
257:                    }
258:                }
259:                length -= 1;
260:                if (DEBUG) {
261:                    Log.debug("New Namecache: " + nameCache);
262:                }
263:            }
264:
265:            public void putField(final String name, final Object value,
266:                    final boolean update) {
267:                if (DEBUG) {
268:                    if (update) {
269:                        Log.debug("  +   : " + name);
270:                    } else {
271:                        Log.debug("Adding: " + name);
272:                    }
273:
274:                }
275:
276:                final Integer o = (Integer) nameCache.get(name);
277:
278:                if (update == false) {
279:                    if (modifiableNameCache == false) {
280:                        this .columnNames = (String[]) columnNames.clone();
281:                        this .nameCache = (HashMap) nameCache.clone();
282:                        this .modifiableNameCache = true;
283:                    }
284:
285:                    // A new column ...
286:                    ensureCapacity(length + 1);
287:                    columnNames[length] = name;
288:                    columnValue[length] = value;
289:                    if (o == null) {
290:                        columnPrev[length] = -1;
291:                    } else {
292:                        columnPrev[length] = o.intValue();
293:                    }
294:
295:                    columnOldValue[length] = null;
296:                    columnChanged[length] = Boolean.TRUE;
297:                    nameCache.put(name, IntegerCache.getInteger(length));
298:                    length += 1;
299:                } else {
300:                    // Updating an existing column ...
301:                    if (o == null) {
302:                        throw new IllegalStateException(
303:                                "Update to a non-existing column: " + name);
304:                    }
305:
306:                    final int idx = o.intValue();
307:                    columnNames[idx] = name;
308:                    columnOldValue[idx] = columnValue[idx];
309:                    columnValue[idx] = value;
310:                    if (ObjectUtilities.equal(columnOldValue[idx],
311:                            columnValue[idx])) {
312:                        columnChanged[idx] = Boolean.FALSE;
313:                    } else {
314:                        columnChanged[idx] = Boolean.TRUE;
315:                    }
316:                }
317:            }
318:
319:            private void ensureCapacity(final int requestedSize) {
320:                final int capacity = this .columnNames.length;
321:                if (capacity > requestedSize) {
322:                    return;
323:                }
324:                final int newSize = Math.max(capacity << 1, requestedSize + 10);
325:
326:                final String[] newColumnNames = new String[newSize];
327:                System.arraycopy(columnNames, 0, newColumnNames, 0, length);
328:                this .columnNames = newColumnNames;
329:
330:                final Boolean[] newColumnChanged = new Boolean[newSize];
331:                System.arraycopy(columnChanged, 0, newColumnChanged, 0, length);
332:                this .columnChanged = newColumnChanged;
333:
334:                final int[] newColumnPrev = new int[newSize];
335:                System.arraycopy(columnPrev, 0, newColumnPrev, 0, length);
336:                this .columnPrev = newColumnPrev;
337:
338:                final Object[] newColumnValue = new Object[newSize];
339:                System.arraycopy(columnValue, 0, newColumnValue, 0, length);
340:                this .columnValue = newColumnValue;
341:
342:                final Object[] newOldColumnValue = new Object[newSize];
343:                System.arraycopy(columnOldValue, 0, newOldColumnValue, 0,
344:                        length);
345:                this.columnOldValue = newOldColumnValue;
346:            }
347:        }
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