/* * Copyright 2002-2018 the original author or authors. * * 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 * * https://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. */package org.springframework.beans.propertyeditors;import java.beans.PropertyEditorSupport;import org.springframework.lang.Nullable;import org.springframework.util.StringUtils;/** * Property editor for Boolean/boolean properties. * * <p>This is not meant to be used as system PropertyEditor but rather as * locale-specific Boolean editor within custom controller code, to parse * UI-caused boolean strings into boolean properties of beans and check * them in the UI form. * * <p>In web MVC code, this editor will typically be registered with * {@code binder.registerCustomEditor} calls. * * @author Juergen Hoeller * @since 10.06.2003 * @see org.springframework.validation.DataBinder#registerCustomEditor */public class CustomBooleanEditor extends PropertyEditorSupport { /** * Value of {@code "true"}. */ public static final String VALUE_TRUE = "true"; /** * Value of {@code "false"}. */ public static final String VALUE_FALSE = "false"; /** * Value of {@code "on"}. */ public static final String VALUE_ON = "on"; /** * Value of {@code "off"}. */ public static final String VALUE_OFF = "off"; /** * Value of {@code "yes"}. */ public static final String VALUE_YES = "yes"; /** * Value of {@code "no"}. */ public static final String VALUE_NO = "no"; /** * Value of {@code "1"}. */ public static final String VALUE_1 = "1"; /** * Value of {@code "0"}. */ public static final String VALUE_0 = "0"; @Nullable private final String trueString;