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-rw-r--r--odk/examples/DevelopersGuide/Forms/NumericValidator.java77
1 files changed, 77 insertions, 0 deletions
diff --git a/odk/examples/DevelopersGuide/Forms/NumericValidator.java b/odk/examples/DevelopersGuide/Forms/NumericValidator.java
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+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+public class NumericValidator extends ControlValidator
+{
+
+ /** Creates a new instance of NumericValidator */
+ public NumericValidator( )
+ {
+ }
+
+ public String explainInvalid( Object Value )
+ {
+ try
+ {
+ double value = ((Double)Value).doubleValue();
+ if ( Double.compare( Double.NaN, value ) == 0 )
+ return "This is NotANumber";
+ if ( !isProperRange( value ) )
+ return "The value must be between 0 and 100";
+ if ( !isProperDigitCount( value ) )
+ return "The value must have at most one decimal digit";
+ }
+ catch( java.lang.Exception e )
+ {
+ return "This is no valid number";
+ }
+ return "";
+ }
+
+ public boolean isValid( Object Value )
+ {
+ try
+ {
+ double value = ((Double)Value).doubleValue();
+ if ( Double.compare( Double.NaN, value ) == 0 )
+ return false;
+ if ( !isProperRange( value ) )
+ return false;
+ if ( !isProperDigitCount( value ) )
+ return false;
+ return true;
+ }
+ catch( java.lang.Exception e )
+ {
+ }
+ return false;
+ }
+
+ private boolean isProperRange( double value)
+ {
+ return ( value >= 0 ) && ( value <= 100 );
+ }
+
+ private boolean isProperDigitCount( double value)
+ {
+ return ( Math.floor( value * 10 ) == value * 10 );
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */