NonEmptyFunction.java
- /*
- * *********************************************************************************************************************
- *
- * TheseFoolishThings: Miscellaneous utilities
- * http://tidalwave.it/projects/thesefoolishthings
- *
- * Copyright (C) 2009 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
- *
- * *********************************************************************************************************************
- *
- * Licensed 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
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
- * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- *
- * *********************************************************************************************************************
- *
- * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
- * git clone https://github.com/tidalwave-it/thesefoolishthings-src
- *
- * *********************************************************************************************************************
- */
- package it.tidalwave.role.ui.function;
- import javax.annotation.Nonnull;
- import it.tidalwave.role.ui.ChangingSource;
- /***********************************************************************************************************************
- *
- * @author Fabrizio Giudici
- *
- **********************************************************************************************************************/
- public class NonEmptyFunction extends UnaryBoundFunctionSupport<String, Boolean>
- {
- @Nonnull
- public static NonEmptyFunction nonEmpty (@Nonnull final ChangingSource<String> source)
- {
- return new NonEmptyFunction(source);
- }
- public NonEmptyFunction (@Nonnull final ChangingSource<String> source)
- {
- super(source);
- }
- @Override
- protected void onSourceChange (@Nonnull final String oldSourceValue, @Nonnull final String newSourceValue)
- {
- final boolean oldValue = function(oldSourceValue);
- value = function(newSourceValue);
- fireValueChanged(oldValue, (boolean)value);
- }
- @Override @Nonnull
- protected Boolean function (final String value)
- {
- return (value != null) && !"".equals(value.trim());
- }
- }