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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
*
http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*******************************************************************************/
package org.ofbiz.entity.model;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.ofbiz.base.config.GenericConfigException;
import org.ofbiz.base.config.MainResourceHandler;
import org.ofbiz.base.config.ResourceHandler;
import org.ofbiz.base.util.Debug;
import org.ofbiz.base.util.UtilTimer;
import org.ofbiz.base.util.UtilXml;
import org.ofbiz.base.util.cache.UtilCache;
import org.ofbiz.entity.config.DatasourceInfo;
import org.ofbiz.entity.config.EntityConfigUtil;
import org.ofbiz.entity.config.FieldTypeInfo;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Generic Entity - Field Type Definition Reader
*
*/
public class ModelFieldTypeReader implements Serializable {
public static final String module = ModelFieldTypeReader.class.getName();
public static UtilCache readers = new UtilCache("entity.ModelFieldTypeReader", 0, 0);
public Map fieldTypeCache = null;
public int numEntities = 0;
public int numFields = 0;
public int numRelations = 0;
public String modelName;
public ResourceHandler fieldTypeResourceHandler;
public String entityFileName;
public static ModelFieldTypeReader getModelFieldTypeReader(String helperName) {
DatasourceInfo datasourceInfo = EntityConfigUtil.getDatasourceInfo(helperName);
if (datasourceInfo == null) {
throw new IllegalArgumentException("Could not find a datasource/helper with the name " + helperName);
}
String tempModelName = datasourceInfo.fieldTypeName;
ModelFieldTypeReader reader = (ModelFieldTypeReader) readers.get(tempModelName);
if (reader == null) // don't want to block here
{
synchronized (ModelFieldTypeReader.class) {
// must check if null again as one of the blocked threads can still enter
reader = (ModelFieldTypeReader) readers.get(tempModelName);
if (reader == null) {
reader = new ModelFieldTypeReader(tempModelName);
readers.put(tempModelName, reader);
}
}
}
return reader;
}
public ModelFieldTypeReader(String modelName) {
this.modelName = modelName;
FieldTypeInfo fieldTypeInfo = EntityConfigUtil.getFieldTypeInfo(modelName);
if (fieldTypeInfo == null) {
throw new IllegalStateException("Could not find a field-type definition with name \"" + modelName + "\"");
}
fieldTypeResourceHandler = new MainResourceHandler(EntityConfigUtil.ENTITY_ENGINE_XML_FILENAME, fieldTypeInfo.resourceElement);
// preload caches...
getFieldTypeCache();
}
public Map getFieldTypeCache() {
if (fieldTypeCache == null) // don't want to block here
{
synchronized (ModelFieldTypeReader.class) {
// must check if null again as one of the blocked threads can still enter
if (fieldTypeCache == null) // now it's safe
{
fieldTypeCache = new HashMap();
UtilTimer utilTimer = new UtilTimer();
// utilTimer.timerString("Before getDocument");
Document document = null;
try {
document = fieldTypeResourceHandler.getDocument();
} catch (GenericConfigException e) {
Debug.logError(e, "Error loading field type file", module);
}
if (document == null) {
fieldTypeCache = null;
return null;
}
// utilTimer.timerString("Before getDocumentElement");
Element docElement = document.getDocumentElement();
if (docElement == null) {
fieldTypeCache = null;
return null;
}
docElement.normalize();
Node curChild = docElement.getFirstChild();
int i = 0;
if (curChild != null) {
utilTimer.timerString("Before start of field type loop");
do {
if (curChild.getNodeType() == Node.ELEMENT_NODE && "field-type-def".equals(curChild.getNodeName())) {
i++;
// utilTimer.timerString("Start loop -- " + i + " --");
Element curFieldType = (Element) curChild;
String fieldTypeName = UtilXml.checkEmpty(curFieldType.getAttribute("type"), "[No type name]");
// utilTimer.timerString(" After fieldTypeName -- " + i + " --");
ModelFieldType fieldType = createModelFieldType(curFieldType, docElement, null);
// utilTimer.timerString(" After createModelFieldType -- " + i + " --");
if (fieldType != null) {
fieldTypeCache.put(fieldTypeName, fieldType);
// utilTimer.timerString(" After fieldTypeCache.put -- " + i + " --");
if (Debug.verboseOn()) Debug.logVerbose("-- getModelFieldType: #" + i + " Created fieldType: " + fieldTypeName, module);
} else {
Debug.logWarning("-- -- ENTITYGEN ERROR:getModelFieldType: Could not create fieldType for fieldTypeName: " + fieldTypeName, module);
}
}
} while ((curChild = curChild.getNextSibling()) != null);
} else
Debug.logWarning("No child nodes found.", module);
utilTimer.timerString("FINISHED - Total Field Types: " + i + " FINISHED");
}
}
}
return fieldTypeCache;
}
/** Creates a Collection with all of the ModelFieldType names
* @return A Collection of ModelFieldType names
*/
public Collection getFieldTypeNames() {
Map ftc = getFieldTypeCache();
return ftc.keySet();
}
/** Creates a Collection with all of the ModelFieldTypes
* @return A Collection of ModelFieldTypes
*/
public Collection getFieldTypes() {
Map ftc = getFieldTypeCache();
return ftc.values();
}
/** Gets an FieldType object based on a definition from the specified XML FieldType descriptor file.
* @param fieldTypeName The fieldTypeName of the FieldType definition to use.
* @return An FieldType object describing the specified fieldType of the specified descriptor file.
*/
public ModelFieldType getModelFieldType(String fieldTypeName) {
Map ftc = getFieldTypeCache();
if (ftc != null)
return (ModelFieldType) ftc.get(fieldTypeName);
else
return null;
}
ModelFieldType createModelFieldType(Element fieldTypeElement, Element docElement, UtilTimer utilTimer) {
if (fieldTypeElement == null) return null;
ModelFieldType field = new ModelFieldType(fieldTypeElement);
return field;
}
}
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