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ValidateOne.java
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/
ValidateOne.java
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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;
/**
* <p>
* The <code><o:validateOne></code> validates if ONLY ONE of the given {@link UIInput} components have been filled
* out.
* <p>
* The default message is
* <blockquote>{0}: Please fill out only one of those fields</blockquote>
* <p>
* For general usage instructions, refer {@link ValidateMultipleFields} documentation.
*
* @author Bauke Scholtz
* @since 1.2
* @see ValidateMultipleFields
* @see ValidatorFamily
* @see MultiFieldValidator
*/
@FacesComponent(ValidateOne.COMPONENT_TYPE)
public class ValidateOne extends ValidateMultipleFields {
// Public constants -----------------------------------------------------------------------------------------------
/** The component type, which is {@value org.omnifaces.component.validator.ValidateOne#COMPONENT_TYPE}. */
public static final String COMPONENT_TYPE = "org.omnifaces.component.validator.ValidateOne";
// Actions --------------------------------------------------------------------------------------------------------
/**
* Validate if only one is filled out.
*/
@Override
public boolean validateValues(FacesContext context, List<UIInput> inputs, List<Object> values) {
boolean hasValue = false;
for (Object value : values) {
if (!isEmpty(value)) {
if (hasValue) {
return false;
}
hasValue = true;
}
}
return hasValue;
}
}