OPENJPA-617 Add support for calculating update value in QueryImpl.updateInMemory

Help comitting patch provided by Fay Wang
Add support for in-memory math - sqrt, abs functions

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@661472 13f79535-47bb-0310-9956-ffa450edef68

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/JDBCStoreQuery.java

@@ -707,6 +707,10 @@ public class JDBCStoreQuery
             return handleTrimVal(value, ob, params, sm);
         case Val.INDEXOF_VAL:
             return handleIndexOfVal(value, ob, params, sm);
+        case Val.ABS_VAL:
+            return handleAbsVal(value, ob, params, sm);
+        case Val.SQRT_VAL:
+            return handleSqrtVal(value, ob, params, sm);
         default:    
             throw new UnsupportedException();
         }
@@ -858,6 +862,42 @@ public class JDBCStoreQuery
         return strVal.indexOf(val1, idx);
     }
 
+    private Object handleAbsVal(Object value, Object ob, Object[] params, 
+        OpenJPAStateManager sm) {
+        org.apache.openjpa.jdbc.kernel.exps.Abs absVal = 
+            (org.apache.openjpa.jdbc.kernel.exps.Abs) value;
+        Object val = getValue(absVal.getValue(), ob, params, sm);
+        Class c = val.getClass();
+        if (c == Integer.class)
+            return new Integer(java.lang.Math.abs(((Integer) val).intValue()));
+        else if (c == Float.class)
+            return new Float(java.lang.Math.abs(((Float) val).floatValue()));
+        else if (c == Double.class)
+            return new Double(java.lang.Math.abs(((Double) val).doubleValue()));
+        else if (c == Long.class)
+            return new Long(java.lang.Math.abs(((Long) val).longValue()));
+        throw new UnsupportedException();
+    }
+
+    private Object handleSqrtVal(Object value, Object ob, Object[] params, 
+        OpenJPAStateManager sm) {
+        org.apache.openjpa.jdbc.kernel.exps.Sqrt sqrtVal = 
+            (org.apache.openjpa.jdbc.kernel.exps.Sqrt) value;
+        Object val = getValue(sqrtVal.getValue(), ob, params, sm);
+        Class c = val.getClass();
+        if (c == Integer.class)
+            return new Double(java.lang.Math.sqrt(((Integer) val).
+                doubleValue()));
+        else if (c == Float.class)
+            return new Double(java.lang.Math.sqrt(((Float) val).floatValue()));
+        else if (c == Double.class)
+            return new Double(java.lang.Math.sqrt(((Double) val).
+                doubleValue()));
+        else if (c == Long.class)
+            return new Double(java.lang.Math.sqrt(((Long) val).doubleValue()));
+        throw new UnsupportedException();
+    }    
+
     private Object getValue(Object value, Object ob, Object[] params,
         OpenJPAStateManager sm) {
         if (value instanceof PCPath) {

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/Abs.java

@@ -26,7 +26,7 @@ import org.apache.openjpa.kernel.Filters;
 /**
  * Absolute value.
  */
-class Abs
+public class Abs
     extends UnaryOp {
 
     /**
@@ -51,5 +51,9 @@ class Abs
     protected String getOperator() {
         return "ABS";
     }
+
+    public int getId() {
+        return Val.ABS_VAL;
+    }
 }
 

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/Math.java

@@ -154,5 +154,9 @@ public class Math
         _val2.acceptVisit(visitor);
         visitor.exit(this);
     }
+
+    public int getId() {
+        return Val.MATH_VAL;
+    }
 }
 

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/Sqrt.java

@@ -23,7 +23,7 @@ package org.apache.openjpa.jdbc.kernel.exps;
  *
  * @author Abe White
  */
-class Sqrt
+public class Sqrt
     extends UnaryOp {
 
     /**
@@ -40,5 +40,9 @@ class Sqrt
     protected String getOperator() {
         return "SQRT";
     }
+
+    public int getId() {
+        return Val.SQRT_VAL;
+    }
 }
 

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/UnaryOp.java

@@ -53,7 +53,7 @@ abstract class UnaryOp
         _noParen = noParen;
     }
 
-    protected Val getValue() {
+    public Val getValue() {
         return _val;
     }
 

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/Val.java

@@ -62,6 +62,8 @@ public interface Val
     public final int LOCATE_VAL = 8;
     public final int ARGS_VAL = 9;
     public final int INDEXOF_VAL = 10;
+    public final int ABS_VAL = 11;
+    public final int SQRT_VAL = 12;
 
     /**
      * Initialize the value. This method should recursively initialize any