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/*
 * Copyright OmniFaces
 *
 * 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.omnifaces.component.validator;

import static org.omnifaces.util.Utils.isEmpty;

import java.util.List;

import jakarta.faces.component.FacesComponent;
import jakarta.faces.component.UIInput;
import jakarta.faces.context.FacesContext;

import org.omnifaces.validator.MultiFieldValidator;

/**
 * 

* The <o:validateOneOrNone> validates if ONLY ONE of the given {@link UIInput} components has been * filled out or that NONE of the given {@link UIInput} components have been filled out. *

* The default message is *

{0}: Please fill out only one or none of those fields
*

* For general usage instructions, refer {@link ValidateMultipleFields} documentation. * * @author Bauke Scholtz * @since 1.2 * @see ValidateMultipleFields * @see ValidatorFamily * @see MultiFieldValidator */ @FacesComponent(ValidateOneOrNone.COMPONENT_TYPE) public class ValidateOneOrNone extends ValidateMultipleFields { // Public constants ----------------------------------------------------------------------------------------------- /** The component type, which is {@value org.omnifaces.component.validator.ValidateOneOrNone#COMPONENT_TYPE}. */ public static final String COMPONENT_TYPE = "org.omnifaces.component.validator.ValidateOneOrNone"; // Actions -------------------------------------------------------------------------------------------------------- /** * Validate if only one or none is filled out. */ @Override public boolean validateValues(FacesContext context, List inputs, List values) { boolean hasValue = false; for (Object value : values) { if (!isEmpty(value)) { if (hasValue) { return false; } hasValue = true; } } return true; } }