From d0e86aec253c57f94e4ebcdb2c417a825daafe3b Mon Sep 17 00:00:00 2001 From: lresende Date: Mon, 2 Nov 2009 22:22:47 +0000 Subject: moving das branches git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@832145 13f79535-47bb-0310-9956-ffa450edef68 --- .../tuscany/das/rdb/impl/DatabaseObject.java | 162 +++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/DatabaseObject.java (limited to 'das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/DatabaseObject.java') diff --git a/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/DatabaseObject.java b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/DatabaseObject.java new file mode 100644 index 0000000000..de42b595b4 --- /dev/null +++ b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/DatabaseObject.java @@ -0,0 +1,162 @@ +/* + * 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.apache.tuscany.das.rdb.impl; + +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; + +import org.apache.log4j.Logger; +import org.apache.tuscany.das.rdb.config.Column; +import org.apache.tuscany.das.rdb.config.Config; +import org.apache.tuscany.das.rdb.config.KeyPair; +import org.apache.tuscany.das.rdb.config.Relationship; +import org.apache.tuscany.das.rdb.config.Table; +import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper; +import org.apache.tuscany.das.rdb.util.LoggerFactory; + +import commonj.sdo.DataObject; +import commonj.sdo.Property; + +/** + * DatabaseObject wraps DataObject. If a field is an FK field, it will return the value from the parent. + * + * + */ +public class DatabaseObject { + + private final Logger logger = LoggerFactory.INSTANCE.getLogger(DatabaseObject.class); + + private final MappingWrapper mappingWrapper; + + private final DataObject dataObject; + + private Property parentReference; + + private Map keyMappings = new HashMap(); + + public DatabaseObject(Config model, DataObject changedObject) { + this.mappingWrapper = new MappingWrapper(model); + this.dataObject = changedObject; + initialize(); + } + + // Initialize Key Mappings + private void initialize() { + if (mappingWrapper.getConfig() != null) { + List relationships = mappingWrapper.getConfig().getRelationship(); + Iterator i = relationships.iterator(); + while (i.hasNext()) { + Relationship r = (Relationship) i.next(); + if (this.logger.isDebugEnabled()) { + this.logger.debug("Initializing relationship: " + r.getName()); + } + if (r.getForeignKeyTable().equals(getTypeName())) { + List pairs = r.getKeyPair(); + Iterator iter = pairs.iterator(); + while (iter.hasNext()) { + KeyPair pair = (KeyPair) iter.next(); + keyMappings.put(pair.getForeignKeyColumn(), r); + } + } + } + } + } + + public Object get(String parameter) { + + if (isPartOfPrimaryKey(parameter)) { + return dataObject.get(parameter); + } + + Relationship r = (Relationship) keyMappings.get(parameter); + if (r == null) { + return dataObject.get(parameter); + } + + Property parentRef = getParentReference(r.getPrimaryKeyTable()); + DataObject parent = dataObject.getDataObject(parentRef); + if (parent == null) { + return null; + } + String parentKey = getParentKey(r, parameter); + return parent.get(parentKey); + + } + + private String getParentKey(Relationship r, String parameter) { + List keyPairs = r.getKeyPair(); + Iterator i = keyPairs.iterator(); + while (i.hasNext()) { + KeyPair pair = (KeyPair) i.next(); + if (pair.getForeignKeyColumn().equals(parameter)) { + return pair.getPrimaryKeyColumn(); + } + } + return null; + } + + public Property getParentReference(String parentName) { + if (this.parentReference == null) { + + Iterator i = dataObject.getType().getProperties().iterator(); + while (i.hasNext()) { + Property ref = (Property) i.next(); + if ((!ref.getType().isDataType()) && (ref.getType().getName().equals(parentName))) { + this.parentReference = ref; + } + } + } + return this.parentReference; + } + + public String getTableName() { + if (mappingWrapper.getConfig() != null) { + return mappingWrapper.getTableByTypeName(getTypeName()).getTableName(); + } + return null; + } + + public String getTypeName() { + return dataObject.getType().getName(); + } + + public void setPropagatedID(String propagatedID, int id) { + dataObject.setInt(propagatedID, id); + } + + private boolean isPartOfPrimaryKey(String parameter) { + if (mappingWrapper.getConfig() == null) { + return false; + } + + Table t = mappingWrapper.getTable(getTableName()); + if (t == null) { + return false; + } + Column c = mappingWrapper.getColumnByPropertyName(t, parameter); + if (c == null) { + return false; + } + + return c.isPrimaryKey(); + } + +} -- cgit v1.2.3