1 files changed, 194 insertions, 0 deletions
diff --git a/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/generator/impl/UpdateGenerator.java b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/generator/impl/UpdateGenerator.java
new file mode 100644
index 0000000000..e2c62fd6ee
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+++ b/das-java/branches/das-java-M2/rdb/src/main/java/org/apache/tuscany/das/rdb/generator/impl/UpdateGenerator.java
@@ -0,0 +1,194 @@
+/*
+ * 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.generator.impl;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.apache.log4j.Logger;
+import org.apache.tuscany.das.rdb.config.Column;
+import org.apache.tuscany.das.rdb.config.Table;
+import org.apache.tuscany.das.rdb.config.wrapper.MappingWrapper;
+import org.apache.tuscany.das.rdb.config.wrapper.RelationshipWrapper;
+import org.apache.tuscany.das.rdb.config.wrapper.TableWrapper;
+import org.apache.tuscany.das.rdb.impl.ManagedParameterImpl;
+import org.apache.tuscany.das.rdb.impl.OptimisticWriteCommandImpl;
+import org.apache.tuscany.das.rdb.impl.ParameterImpl;
+import org.apache.tuscany.das.rdb.impl.UpdateCommandImpl;
+import org.apache.tuscany.das.rdb.util.LoggerFactory;
+
+import commonj.sdo.ChangeSummary;
+import commonj.sdo.DataObject;
+import commonj.sdo.Property;
+import commonj.sdo.Type;
+
+public final class UpdateGenerator extends BaseGenerator {
+
+    public static final UpdateGenerator INSTANCE = new UpdateGenerator();
+
+    private final Logger logger = LoggerFactory.INSTANCE.getLogger(UpdateGenerator.class);
+
+    private UpdateGenerator() {
+        super();
+    }
+
+    public UpdateCommandImpl getUpdateCommand(MappingWrapper mapping, DataObject changedObject, Table table) {
+        List updatedProperties = new ArrayList();
+        List managedProperties = new ArrayList();
+        List whereClauseProperties = new ArrayList();
+        Type type = changedObject.getType();
+        TableWrapper t = new TableWrapper(table);
+        StringBuffer statement = new StringBuffer("update ");
+        statement.append(table.getTableName());
+        statement.append(" set ");
+
+        ChangeSummary summary = changedObject.getDataGraph().getChangeSummary();
+        Iterator i = getChangedFields(mapping, summary, changedObject).iterator();
+
+        while (i.hasNext()) {
+            Property property = (Property) i.next();
+            Column c = t.getColumnByPropertyName(property.getName());
+            if ((c != null) && (c.isCollision() || c.isPrimaryKey())) {
+                // get rid of comma if OCC or PK is last field
+                if (!i.hasNext()) {
+                    statement.delete(statement.length() - 2, statement.length());
+                }
+            } else {
+                updatedProperties.add(property);
+                statement.append(c == null ? property.getName() : c.getColumnName());
+                statement.append(" = ?");
+                if (i.hasNext()) {
+                    statement.append(", ");
+                }
+            }
+        }
+
+        Column c = t.getManagedColumn();
+        if (c != null) {
+            statement.append(", ");
+            statement.append(c.getColumnName());
+            statement.append(" = ?");
+            managedProperties.add(changedObject.getProperty(t.getManagedColumnPropertyName()));
+        }
+        statement.append(" where ");
+
+        Iterator names = t.getPrimaryKeyNames().iterator();
+        Iterator pkProperties = t.getPrimaryKeyProperties().iterator();
+        while (names.hasNext() && pkProperties.hasNext()) {
+            String name = (String) names.next();
+            String property = (String) pkProperties.next();
+            statement.append(name);
+            statement.append(" = ?");
+            if (names.hasNext() && pkProperties.hasNext()) {
+                statement.append(" and ");
+            }
+            whereClauseProperties.add(type.getProperty(property));
+        }
+
+        if (t.getCollisionColumn() != null) {
+            statement.append(" and ");
+            statement.append(t.getCollisionColumn().getColumnName());
+            statement.append(" = ?");
+            whereClauseProperties.add(type.getProperty(t.getCollisionColumnPropertyName()));
+        }
+
+        UpdateCommandImpl updateCommand;
+        if (t.getCollisionColumn() != null) {
+            updateCommand = new OptimisticWriteCommandImpl(statement.toString());
+        } else {
+            updateCommand = new UpdateCommandImpl(statement.toString());
+        }
+
+        int idx = 1;
+        Iterator params = updatedProperties.iterator();
+        while (params.hasNext()) {
+            Property p = (Property) params.next();
+            updateCommand.addParameter(createParameter(t, p, idx++));
+        }
+
+        params = managedProperties.iterator();
+        while (params.hasNext()) {
+            Property p = (Property) params.next();
+            updateCommand.addParameter(createManagedParameter(t, p, idx++));
+        }
+
+        params = whereClauseProperties.iterator();
+        while (params.hasNext()) {
+            Property p = (Property) params.next();
+            updateCommand.addParameter(createParameter(t, p, idx++));
+        }
+
+        if (this.logger.isDebugEnabled()) {
+            this.logger.debug(statement.toString());
+        }
+
+        return updateCommand;
+    }
+
+    private List getChangedFields(MappingWrapper mapping, ChangeSummary summary, DataObject obj) {
+        List changes = new ArrayList();
+        Iterator i = summary.getOldValues(obj).iterator();
+        while (i.hasNext()) {
+            ChangeSummary.Setting setting = (ChangeSummary.Setting) i.next();
+            if (setting.getProperty().getType().isDataType()) {
+                changes.add(setting.getProperty());
+            } else {
+                Property ref = setting.getProperty();
+                if (!ref.isMany()) {
+                    RelationshipWrapper r = new RelationshipWrapper(mapping.getRelationshipByReference(ref));
+
+                    Iterator keys = r.getForeignKeys().iterator();
+                    while (keys.hasNext()) {
+                        String key = (String) keys.next();
+                        Property p = obj.getType().getProperty(key);
+                        changes.add(p);
+                    }
+                }
+
+            }
+        }
+        return changes;
+    }
+
+    private ParameterImpl createManagedParameter(TableWrapper table, Property property, int idx) {
+        ParameterImpl param = new ManagedParameterImpl();
+        param.setName(property.getName());
+        param.setType(property.getType());
+        param.setConverter(getConverter(table.getConverter(property.getName())));
+        if (idx != -1) {
+            param.setIndex(idx);
+        }
+
+        return param;
+    }
+
+    private ParameterImpl createParameter(TableWrapper table, Property property, int idx) {
+        ParameterImpl param = new ParameterImpl();
+        param.setName(property.getName());
+        param.setType(property.getType());
+        param.setConverter(getConverter(table.getConverter(property.getName())));
+        if (idx != -1) {
+            param.setIndex(idx);
+        }
+
+        return param;
+    }
+
+}