initial add of EbeanORM server based on v2.8.1

src/main/java/com/avaje/ebeaninternal/server/query/CQueryOrderBy.java

@@ -0,0 +1,96 @@
+/**
+ * Copyright (C) 2009 Authors
+ * 
+ * This file is part of Ebean.
+ * 
+ * Ebean is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *  
+ * Ebean is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Ebean; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA  
+ */
+package com.avaje.ebeaninternal.server.query;
+
+import java.util.List;
+
+import com.avaje.ebean.OrderBy;
+import com.avaje.ebean.OrderBy.Property;
+import com.avaje.ebeaninternal.api.SpiQuery;
+import com.avaje.ebeaninternal.server.deploy.BeanDescriptor;
+import com.avaje.ebeaninternal.server.deploy.BeanProperty;
+import com.avaje.ebeaninternal.server.deploy.BeanPropertyAssoc;
+import com.avaje.ebeaninternal.server.deploy.id.IdBinder;
+import com.avaje.ebeaninternal.server.el.ElPropertyValue;
+
+/**
+ * Creates the order by expression clause.
+ */
+public class CQueryOrderBy {
+
+    private final BeanDescriptor<?> desc;
+    
+    private final SpiQuery<?> query;
+    
+    /**
+     * Create the logical order by clause.
+     */
+    public static String parse(BeanDescriptor<?> desc, SpiQuery<?> query) {
+        return new CQueryOrderBy(desc, query).parseInternal();
+    }
+    
+    private CQueryOrderBy(BeanDescriptor<?> desc, SpiQuery<?> query) {
+        this.desc = desc;
+        this.query = query;
+    }
+    
+    private String parseInternal() {
+        
+        OrderBy<?> orderBy = query.getOrderBy();
+        if (orderBy == null){
+            return null;
+        }
+        
+        StringBuilder sb = new StringBuilder();
+
+        List<Property> properties = orderBy.getProperties();
+        if (properties.isEmpty()){
+            // order by clause removed by filterMany()
+            return null;
+        }
+        for (int i = 0; i < properties.size(); i++) {
+            if (i > 0){
+                sb.append(", ");
+            }
+            Property p = properties.get(i);
+            String expression = parseProperty(p);
+            sb.append(expression);
+        }
+        return sb.toString();
+    }
+    
+    private String parseProperty(Property p) {
+        
+        String propName = p.getProperty();
+        ElPropertyValue el  = desc.getElGetValue(propName);
+        if (el == null){
+            return p.toStringFormat();
+        } 
+        
+        BeanProperty beanProperty = el.getBeanProperty();
+        if (beanProperty instanceof BeanPropertyAssoc<?>){
+            BeanPropertyAssoc<?> ap = (BeanPropertyAssoc<?>)beanProperty;
+            IdBinder idBinder = ap.getTargetDescriptor().getIdBinder();
+            return idBinder.getOrderBy(el.getElName(), p.isAscending());
+        }
+        
+        return p.toStringFormat();
+    }
+}