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diff --git a/netx/net/sourceforge/jnlp/config/BasicValueValidators.java b/netx/net/sourceforge/jnlp/config/BasicValueValidators.java
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+/* BasicValueCheckers.java
+   Copyright (C) 2010 Red Hat, Inc.
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 2.
+
+IcedTea is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version.
+*/
+
+package net.sourceforge.jnlp.config;
+
+import static net.sourceforge.jnlp.runtime.Translator.R;
+
+import java.net.URL;
+import java.util.Arrays;
+import java.util.Locale;
+
+/**
+ * Provides {@link ValueValidator} implementations for some common value types
+ *
+ * @see #getBooleanValidator()
+ * @see #getFilePathValidator()
+ * @see #getRangedIntegerValidator(int, int)
+ * @see #getStringValidator(String[])
+ * @see #getUrlValidator()
+ */
+public class BasicValueValidators {
+
+    /**
+     * Checks if a value is a valid boolean
+     */
+    private static class BooleanValidator implements ValueValidator {
+
+        @Override
+        public void validate(Object value) throws IllegalArgumentException {
+            Object possibleValue = value;
+
+            if (possibleValue instanceof String) {
+                String lower = ((String) possibleValue).toLowerCase(Locale.ENGLISH);
+                if (lower.equals(Boolean.TRUE.toString())
+                        || (lower.equals(Boolean.FALSE.toString()))) {
+                    possibleValue = Boolean.valueOf(lower);
+                }
+            }
+
+            if (!(possibleValue instanceof Boolean)) {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public String getPossibleValues() {
+            return R("VVPossibleBooleanValues", Boolean.TRUE.toString(), Boolean.FALSE.toString());
+        }
+    };
+
+    /**
+     * Checks if a value is a valid file path (not a valid file!). The actual
+     * file may or may not exist
+     */
+    private static class FilePathValidator implements ValueValidator {
+
+        @Override
+        public void validate(Object value) throws IllegalArgumentException {
+            if (value == null) {
+                return;
+            }
+
+            Object possibleValue = value;
+
+            if (!(possibleValue instanceof String)) {
+                throw new IllegalArgumentException();
+            }
+
+            String possibleFile = (String) possibleValue;
+            if (!(possibleFile.startsWith("/"))) {
+                throw new IllegalArgumentException();
+            }
+
+        }
+
+        @Override
+        public String getPossibleValues() {
+            return R("VVPossibleFileValues");
+        }
+
+    }
+
+    /**
+     * Checks that the value is an Integer or Long (or a String representation
+     * of one) that is within a desired range).
+     */
+    private static class RangedIntegerValidator implements ValueValidator {
+        private int low = 0;
+        private int high = 0;
+
+        public RangedIntegerValidator(int low, int high) {
+            this.low = low;
+            this.high = high;
+        }
+
+        @Override
+        public void validate(Object value) throws IllegalArgumentException {
+            Object possibleValue = value;
+
+            long actualValue = 0;
+            try {
+                if (possibleValue instanceof String) {
+                    actualValue = Long.valueOf((String) possibleValue);
+                } else if (possibleValue instanceof Integer) {
+                    actualValue = (Integer) possibleValue;
+                } else if (possibleValue instanceof Long) {
+                    actualValue = (Long) possibleValue;
+                } else {
+                    throw new IllegalArgumentException("Must be an integer");
+                }
+            } catch (NumberFormatException e) {
+                throw new IllegalArgumentException("Must be an integer");
+
+            }
+
+            if (actualValue < low || actualValue > high) {
+                throw new IllegalArgumentException("Not in range from " + low + " to " + high);
+            }
+        }
+
+        @Override
+        public String getPossibleValues() {
+            return R("VVPossibleRangedIntegerValues", low, high);
+        }
+
+    };
+
+    /**
+     * Checks that the value is one of the acceptable String values
+     */
+    private static class StringValueValidator implements ValueValidator {
+        String[] options = null;
+
+        public StringValueValidator(String[] acceptableOptions) {
+            options = acceptableOptions;
+        }
+
+        @Override
+        public void validate(Object value) throws IllegalArgumentException {
+            Object possibleValue = value;
+            if (!(possibleValue instanceof String)) {
+                throw new IllegalArgumentException("Must be a string");
+            }
+
+            String stringVal = (String) possibleValue;
+            boolean found = false;
+            for (String knownVal : options) {
+                if (knownVal.equals(stringVal)) {
+                    found = true;
+                    break;
+                }
+            }
+
+            if (!found) {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public String getPossibleValues() {
+            return Arrays.toString(options);
+        }
+
+    }
+
+    /**
+     * Checks that the value is a URL
+     */
+    private static class UrlValidator implements ValueValidator {
+
+        @Override
+        public void validate(Object value) throws IllegalArgumentException {
+            if (value == null) {
+                return;
+            }
+            try {
+                new URL((String) value);
+            } catch (Exception e) {
+                throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public String getPossibleValues() {
+            return R("VVPossibleUrlValues");
+        }
+
+    }
+
+    /**
+     * @return a {@link ValueValidator} that can be used to check if an object is
+     * a valid Boolean
+     */
+    public static ValueValidator getBooleanValidator() {
+        return new BooleanValidator();
+    }
+
+    /**
+     * @return a {@link ValueValidator} that can be used to check if an object is
+     * a String containing a valid file path or not
+     */
+    public static ValueValidator getFilePathValidator() {
+        return new FilePathValidator();
+    }
+
+    /**
+     * Returns a {@link ValueValidator} that checks if an object represents a
+     * valid integer (it is a Integer or Long or a String representation of
+     * one), within the given range. The values are inclusive.
+     * @param low the lowest valid value
+     * @param high the highest valid value
+     */
+    public static ValueValidator getRangedIntegerValidator(int low, int high) {
+        return new RangedIntegerValidator(low, high);
+    }
+
+    /**
+     * Returns a {@link ValueValidator} that checks if an object is a string from
+     * one of the provided Strings.
+     * @param validValues an array of Strings which are considered valid
+     */
+    public static ValueValidator getStringValidator(String[] validValues) {
+        return new StringValueValidator(validValues);
+    }
+
+    /**
+     * @return a {@link ValueValidator} that checks if an object represents a
+     * valid url
+     */
+    public static ValueValidator getUrlValidator() {
+        return new UrlValidator();
+    }
+
+}