misc. maintenance

[mir.git] / source / mir / util / GeneratorIntegerFunctions.java

diff --git a/source/mir/util/GeneratorIntegerFunctions.java b/source/mir/util/GeneratorIntegerFunctions.java
new file mode 100755 (executable)
index 0000000..5a36749
--- /dev/null
+++ b/source/mir/util/GeneratorIntegerFunctions.java
@@ -0,0 +1,48 @@
+package mir.util;
+
+import java.util.*;
+import mir.generator.*;
+
+public class GeneratorIntegerFunctions {
+
+  private GeneratorIntegerFunctions() {}
+
+  public static class incrementFunction implements Generator.GeneratorFunction {
+    public Object perform(List aParameters) throws GeneratorExc, GeneratorFailure {
+      int incrementValue = 1;
+
+      try {
+        if (aParameters.size()>2 || aParameters.size()<1)
+          throw new GeneratorExc("incrementFunction: 1 or 2 parameters expected: value [increment value]");
+
+        if (aParameters.size()>1)
+          incrementValue = StringRoutines.interpretAsInteger(aParameters.get(1));
+
+        return new Integer(StringRoutines.interpretAsInteger(aParameters.get(0)) + incrementValue);
+      }
+      catch (GeneratorExc e) {
+        throw e;
+      }
+      catch (Throwable t) {
+        throw new GeneratorFailure("incrementFunction: " + t.getMessage(), t);
+      }
+    };
+  }
+
+  public static class isOddFunction implements Generator.GeneratorFunction {
+    public Object perform(List aParameters) throws GeneratorExc, GeneratorFailure {
+      try {
+        if (aParameters.size()!=1)
+          throw new GeneratorExc("isOddFunction: 1 parameters expected: value");
+
+        return new Boolean((StringRoutines.interpretAsInteger(aParameters.get(0)) & 1) == 1);
+      }
+      catch (GeneratorExc e) {
+        throw e;
+      }
+      catch (Throwable t) {
+        throw new GeneratorFailure("isOddFunction: " + t.getMessage(), t);
+      }
+    };
+  }
+}
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