first commit

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

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+package net.sf.jasperreports.engine.fill;
+
+import java.math.BigDecimal;
+
+class JRBigDecimalSumIncrementer extends JRAbstractExtendedIncrementer {
+  private static JRBigDecimalSumIncrementer mainInstance = new JRBigDecimalSumIncrementer();
+  
+  public static JRBigDecimalSumIncrementer getInstance() {
+    return mainInstance;
+  }
+  
+  public Object increment(JRCalculable variable, Object expressionValue, AbstractValueProvider valueProvider) {
+    BigDecimal value = (BigDecimal)variable.getIncrementedValue();
+    BigDecimal newValue = (BigDecimal)expressionValue;
+    if (newValue == null) {
+      if (variable.isInitialized())
+        return null; 
+      return value;
+    } 
+    if (value == null || variable.isInitialized())
+      value = JRBigDecimalIncrementerFactory.ZERO; 
+    return value.add(newValue);
+  }
+  
+  public Object initialValue() {
+    return JRBigDecimalIncrementerFactory.ZERO;
+  }
+}