first commit

hrmsEjb/net/sf/jasperreports/engine/fill/JRDoubleSumIncrementer.java

@@ -0,0 +1,26 @@
+package net.sf.jasperreports.engine.fill;
+
+class JRDoubleSumIncrementer extends JRAbstractExtendedIncrementer {
+  private static JRDoubleSumIncrementer mainInstance = new JRDoubleSumIncrementer();
+  
+  public static JRDoubleSumIncrementer getInstance() {
+    return mainInstance;
+  }
+  
+  public Object increment(JRCalculable variable, Object expressionValue, AbstractValueProvider valueProvider) {
+    Number value = (Number)variable.getIncrementedValue();
+    Number newValue = (Number)expressionValue;
+    if (newValue == null) {
+      if (variable.isInitialized())
+        return null; 
+      return value;
+    } 
+    if (value == null || variable.isInitialized())
+      value = JRDoubleIncrementerFactory.ZERO; 
+    return new Double(value.doubleValue() + newValue.doubleValue());
+  }
+  
+  public Object initialValue() {
+    return JRDoubleIncrementerFactory.ZERO;
+  }
+}