Source Code Cross Referenced for ModelGroupReader.java in  » ERP-CRM-Financial » SourceTap-CRM » org » ofbiz » entity » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » SourceTap CRM » org.ofbiz.entity.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Id: ModelGroupReader.java,v 1.4 2003/11/25 07:48:14 jonesde Exp $
003:         *
004:         *  Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
005:         *
006:         *  Permission is hereby granted, free of charge, to any person obtaining a
007:         *  copy of this software and associated documentation files (the "Software"),
008:         *  to deal in the Software without restriction, including without limitation
009:         *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
010:         *  and/or sell copies of the Software, and to permit persons to whom the
011:         *  Software is furnished to do so, subject to the following conditions:
012:         *
013:         *  The above copyright notice and this permission notice shall be included
014:         *  in all copies or substantial portions of the Software.
015:         *
016:         *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
017:         *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
018:         *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
019:         *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
020:         *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
021:         *  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
022:         *  THE USE OR OTHER DEALINGS IN THE SOFTWARE.
023:         */
024:        package org.ofbiz.entity.model;
025:
026:        import java.util.ArrayList;
027:        import java.util.Collection;
028:        import java.util.HashMap;
029:        import java.util.Iterator;
030:        import java.util.LinkedList;
031:        import java.util.List;
032:        import java.util.Map;
033:        import java.util.Set;
034:        import java.util.TreeSet;
035:
036:        import org.ofbiz.base.component.ComponentConfig;
037:        import org.ofbiz.base.config.GenericConfigException;
038:        import org.ofbiz.base.config.MainResourceHandler;
039:        import org.ofbiz.base.config.ResourceHandler;
040:        import org.ofbiz.entity.GenericEntityConfException;
041:        import org.ofbiz.entity.config.EntityConfigUtil;
042:        import org.ofbiz.base.util.Debug;
043:        import org.ofbiz.base.util.UtilCache;
044:        import org.ofbiz.base.util.UtilTimer;
045:        import org.ofbiz.base.util.UtilXml;
046:        import org.w3c.dom.Document;
047:        import org.w3c.dom.Element;
048:        import org.w3c.dom.Node;
049:
050:        /**
051:         * Generic Entity - Entity Group Definition Reader
052:         *
053:         * @author     <a href="mailto:jonesde@ofbiz.org">David E. Jones</a> 
054:         * @version    $Revision: 1.4 $
055:         * @since      2.0
056:         */
057:        public class ModelGroupReader {
058:
059:            public static final String module = ModelGroupReader.class
060:                    .getName();
061:            public static UtilCache readers = new UtilCache(
062:                    "entity.ModelGroupReader", 0, 0);
063:
064:            private Map groupCache = null;
065:            private Set groupNames = null;
066:
067:            public String modelName;
068:            public List entityGroupResourceHandlers = new LinkedList();
069:
070:            public static ModelGroupReader getModelGroupReader(
071:                    String delegatorName) throws GenericEntityConfException {
072:                EntityConfigUtil.DelegatorInfo delegatorInfo = EntityConfigUtil
073:                        .getDelegatorInfo(delegatorName);
074:
075:                if (delegatorInfo == null) {
076:                    throw new GenericEntityConfException(
077:                            "Could not find a delegator with the name "
078:                                    + delegatorName);
079:                }
080:
081:                String tempModelName = delegatorInfo.entityGroupReader;
082:                ModelGroupReader reader = (ModelGroupReader) readers
083:                        .get(tempModelName);
084:
085:                if (reader == null) { // don't want to block here
086:                    synchronized (ModelGroupReader.class) {
087:                        // must check if null again as one of the blocked threads can still enter
088:                        reader = (ModelGroupReader) readers.get(tempModelName);
089:                        if (reader == null) {
090:                            reader = new ModelGroupReader(tempModelName);
091:                            readers.put(tempModelName, reader);
092:                        }
093:                    }
094:                }
095:                return reader;
096:            }
097:
098:            public ModelGroupReader(String modelName)
099:                    throws GenericEntityConfException {
100:                this .modelName = modelName;
101:                EntityConfigUtil.EntityGroupReaderInfo entityGroupReaderInfo = EntityConfigUtil
102:                        .getEntityGroupReaderInfo(modelName);
103:
104:                if (entityGroupReaderInfo == null) {
105:                    throw new GenericEntityConfException(
106:                            "Cound not find an entity-group-reader with the name "
107:                                    + modelName);
108:                }
109:                Iterator resourceElementIter = entityGroupReaderInfo.resourceElements
110:                        .iterator();
111:                while (resourceElementIter.hasNext()) {
112:                    Element resourceElement = (Element) resourceElementIter
113:                            .next();
114:                    this .entityGroupResourceHandlers
115:                            .add(new MainResourceHandler(
116:                                    EntityConfigUtil.ENTITY_ENGINE_XML_FILENAME,
117:                                    resourceElement));
118:                }
119:
120:                // get all of the component resource group stuff, ie specified in each ofbiz-component.xml file
121:                List componentResourceInfos = ComponentConfig
122:                        .getAllEntityResourceInfos("group");
123:                Iterator componentResourceInfoIter = componentResourceInfos
124:                        .iterator();
125:                while (componentResourceInfoIter.hasNext()) {
126:                    ComponentConfig.EntityResourceInfo componentResourceInfo = (ComponentConfig.EntityResourceInfo) componentResourceInfoIter
127:                            .next();
128:                    if (modelName.equals(componentResourceInfo.readerName)) {
129:                        this .entityGroupResourceHandlers
130:                                .add(componentResourceInfo
131:                                        .createResourceHandler());
132:                    }
133:                }
134:
135:                // preload caches...
136:                getGroupCache();
137:            }
138:
139:            public Map getGroupCache() {
140:                if (this .groupCache == null) // don't want to block here
141:                {
142:                    synchronized (ModelGroupReader.class) {
143:                        // must check if null again as one of the blocked threads can still enter
144:                        if (this .groupCache == null) {
145:                            // now it's safe
146:                            this .groupCache = new HashMap();
147:                            this .groupNames = new TreeSet();
148:
149:                            UtilTimer utilTimer = new UtilTimer();
150:                            // utilTimer.timerString("[ModelGroupReader.getGroupCache] Before getDocument");
151:
152:                            int i = 0;
153:                            Iterator entityGroupResourceHandlerIter = this .entityGroupResourceHandlers
154:                                    .iterator();
155:                            while (entityGroupResourceHandlerIter.hasNext()) {
156:                                ResourceHandler entityGroupResourceHandler = (ResourceHandler) entityGroupResourceHandlerIter
157:                                        .next();
158:                                Document document = null;
159:
160:                                try {
161:                                    document = entityGroupResourceHandler
162:                                            .getDocument();
163:                                } catch (GenericConfigException e) {
164:                                    Debug.logError(e,
165:                                            "Error loading entity group model",
166:                                            module);
167:                                }
168:                                if (document == null) {
169:                                    this .groupCache = null;
170:                                    return null;
171:                                }
172:
173:                                // utilTimer.timerString("[ModelGroupReader.getGroupCache] Before getDocumentElement");
174:                                Element docElement = document
175:                                        .getDocumentElement();
176:                                if (docElement == null) {
177:                                    continue;
178:                                }
179:                                docElement.normalize();
180:
181:                                Node curChild = docElement.getFirstChild();
182:                                if (curChild != null) {
183:                                    utilTimer
184:                                            .timerString("[ModelGroupReader.getGroupCache] Before start of entity loop");
185:                                    do {
186:                                        if (curChild.getNodeType() == Node.ELEMENT_NODE
187:                                                && "entity-group"
188:                                                        .equals(curChild
189:                                                                .getNodeName())) {
190:                                            Element curEntity = (Element) curChild;
191:                                            String entityName = UtilXml
192:                                                    .checkEmpty(curEntity
193:                                                            .getAttribute("entity"));
194:                                            String groupName = UtilXml
195:                                                    .checkEmpty(curEntity
196:                                                            .getAttribute("group"));
197:
198:                                            if (groupName == null
199:                                                    || entityName == null)
200:                                                continue;
201:                                            this .groupNames.add(groupName);
202:                                            this .groupCache.put(entityName,
203:                                                    groupName);
204:                                            // utilTimer.timerString("  After entityEntityName -- " + i + " --");
205:                                            i++;
206:                                        }
207:                                    } while ((curChild = curChild
208:                                            .getNextSibling()) != null);
209:                                } else {
210:                                    Debug
211:                                            .logWarning(
212:                                                    "[ModelGroupReader.getGroupCache] No child nodes found.",
213:                                                    module);
214:                                }
215:                            }
216:                            utilTimer
217:                                    .timerString("[ModelGroupReader.getGroupCache] FINISHED - Total Entity-Groups: "
218:                                            + i + " FINISHED");
219:                        }
220:                    }
221:                }
222:                return this .groupCache;
223:            }
224:
225:            /** Gets a group name based on a definition from the specified XML Entity Group descriptor file.
226:             * @param entityName The entityName of the Entity Group definition to use.
227:             * @return A group name
228:             */
229:            public String getEntityGroupName(String entityName) {
230:                Map gc = getGroupCache();
231:
232:                if (gc != null)
233:                    return (String) gc.get(entityName);
234:                else
235:                    return null;
236:            }
237:
238:            /** Creates a Collection with all of the groupNames defined in the specified XML Entity Group Descriptor file.
239:             * @return A Collection of groupNames Strings
240:             */
241:            public Collection getGroupNames() {
242:                getGroupCache();
243:                if (this .groupNames == null)
244:                    return null;
245:                return new ArrayList(this .groupNames);
246:            }
247:
248:            /** Creates a Collection with names of all of the entities for a given group
249:             * @param groupName
250:             * @return A Collection of entityName Strings
251:             */
252:            public Collection getEntityNamesByGroup(String groupName) {
253:                Map gc = getGroupCache();
254:                Collection enames = new LinkedList();
255:
256:                if (groupName == null || groupName.length() <= 0)
257:                    return enames;
258:                if (gc == null || gc.size() < 0)
259:                    return enames;
260:                Set gcEntries = gc.entrySet();
261:                Iterator gcIter = gcEntries.iterator();
262:
263:                while (gcIter.hasNext()) {
264:                    Map.Entry entry = (Map.Entry) gcIter.next();
265:
266:                    if (groupName.equals(entry.getValue()))
267:                        enames.add(entry.getKey());
268:                }
269:                return enames;
270:            }
271:        }
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