112      * Returns a {@code LongExpression} that wraps an
 113      * {@link javafx.beans.value.ObservableValue}. If the
 114      * {@code ObservableValue} is already a {@code LongExpression}, it
 115      * will be returned. Otherwise a new
 116      * {@link javafx.beans.binding.LongBinding} is created that is bound to
 117      * the {@code ObservableValue}.
 118      *
 119      * <p>
 120      * Note: this method can be used to convert an {@link ObjectExpression} or
 121      * {@link javafx.beans.property.ObjectProperty} of specific number type to LongExpression, which
 122      * is essentially an {@code ObservableValue<Number>}. See sample below.
 123      *
 124      * <blockquote><pre>
 125      *   LongProperty longProperty = new SimpleLongProperty(1L);
 126      *   ObjectProperty&lt;Long&gt; objectProperty = new SimpleObjectProperty&lt;&gt;(2L);
 127      *   BooleanBinding binding = longProperty.greaterThan(LongExpression.longExpression(objectProperty));
 128      * </pre></blockquote>
 129      *
 130      * Note: null values will be interpreted as 0L
 131      *

 132      * @param value
 133      *            The source {@code ObservableValue}
 134      * @return A {@code LongExpression} that wraps the
 135      *         {@code ObservableValue} if necessary
 136      * @throws NullPointerException
 137      *             if {@code value} is {@code null}
 138      * @since JavaFX 8.0
 139      */
 140     public static <T extends Number> LongExpression longExpression(final ObservableValue<T> value) {
 141         if (value == null) {
 142             throw new NullPointerException("Value must be specified.");
 143         }
 144         return (value instanceof LongExpression) ? (LongExpression) value
 145                 : new LongBinding() {
 146             {
 147                 super.bind(value);
 148             }
 149 
 150             @Override
 151             public void dispose() {

 112      * Returns a {@code LongExpression} that wraps an
 113      * {@link javafx.beans.value.ObservableValue}. If the
 114      * {@code ObservableValue} is already a {@code LongExpression}, it
 115      * will be returned. Otherwise a new
 116      * {@link javafx.beans.binding.LongBinding} is created that is bound to
 117      * the {@code ObservableValue}.
 118      *
 119      * <p>
 120      * Note: this method can be used to convert an {@link ObjectExpression} or
 121      * {@link javafx.beans.property.ObjectProperty} of specific number type to LongExpression, which
 122      * is essentially an {@code ObservableValue<Number>}. See sample below.
 123      *
 124      * <blockquote><pre>
 125      *   LongProperty longProperty = new SimpleLongProperty(1L);
 126      *   ObjectProperty&lt;Long&gt; objectProperty = new SimpleObjectProperty&lt;&gt;(2L);
 127      *   BooleanBinding binding = longProperty.greaterThan(LongExpression.longExpression(objectProperty));
 128      * </pre></blockquote>
 129      *
 130      * Note: null values will be interpreted as 0L
 131      *
 132      * @param <T> The type of Number to be wrapped
 133      * @param value
 134      *            The source {@code ObservableValue}
 135      * @return A {@code LongExpression} that wraps the
 136      *         {@code ObservableValue} if necessary
 137      * @throws NullPointerException
 138      *             if {@code value} is {@code null}
 139      * @since JavaFX 8.0
 140      */
 141     public static <T extends Number> LongExpression longExpression(final ObservableValue<T> value) {
 142         if (value == null) {
 143             throw new NullPointerException("Value must be specified.");
 144         }
 145         return (value instanceof LongExpression) ? (LongExpression) value
 146                 : new LongBinding() {
 147             {
 148                 super.bind(value);
 149             }
 150 
 151             @Override
 152             public void dispose() {