call JSF Validators - Java JSF

Java examples for JSF:Validator

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Description

call JSF Validators

Demo Code

/*/*w  w  w.jav a  2 s. c o  m*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
import javax.el.ValueExpression;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.MethodBinding;
import javax.faces.el.ValueBinding;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import java.util.Collection;

public class Main{
    static void callValidators(FacesContext context, UIInput input,
            Object convertedValue) {
        // first invoke the list of validator components
        Validator[] validators = input.getValidators();
        for (int i = 0; i < validators.length; i++) {
            Validator validator = validators[i];
            try {
                validator.validate(context, input, convertedValue);
            } catch (ValidatorException e) {
                input.setValid(false);

                String validatorMessage = input.getValidatorMessage();
                if (validatorMessage != null) {
                    context.addMessage(input.getClientId(context),
                            new FacesMessage(FacesMessage.SEVERITY_ERROR,
                                    validatorMessage, validatorMessage));
                } else {
                    FacesMessage facesMessage = e.getFacesMessage();
                    if (facesMessage != null) {
                        facesMessage
                                .setSeverity(FacesMessage.SEVERITY_ERROR);
                        context.addMessage(input.getClientId(context),
                                facesMessage);
                    }
                    Collection<FacesMessage> facesMessages = e
                            .getFacesMessages();
                    if (facesMessages != null) {
                        for (FacesMessage message : facesMessages) {
                            message.setSeverity(FacesMessage.SEVERITY_ERROR);
                            context.addMessage(input.getClientId(context),
                                    message);
                        }
                    }
                }
            }
        }

        // now invoke the validator method defined as a method-binding attribute
        // on the component
        MethodBinding validatorBinding = input.getValidator();
        if (validatorBinding != null) {
            try {
                validatorBinding.invoke(context, new Object[] { context,
                        input, convertedValue });
            } catch (EvaluationException e) {
                input.setValid(false);
                Throwable cause = e.getCause();
                if (cause instanceof ValidatorException) {
                    String validatorMessage = input.getValidatorMessage();
                    if (validatorMessage != null) {
                        context.addMessage(input.getClientId(context),
                                new FacesMessage(
                                        FacesMessage.SEVERITY_ERROR,
                                        validatorMessage, validatorMessage));
                    } else {
                        FacesMessage facesMessage = ((ValidatorException) cause)
                                .getFacesMessage();
                        if (facesMessage != null) {
                            facesMessage
                                    .setSeverity(FacesMessage.SEVERITY_ERROR);
                            context.addMessage(input.getClientId(context),
                                    facesMessage);
                        }
                        Collection<FacesMessage> facesMessages = ((ValidatorException) cause)
                                .getFacesMessages();
                        if (facesMessages != null) {
                            for (FacesMessage message : facesMessages) {
                                message.setSeverity(FacesMessage.SEVERITY_ERROR);
                                context.addMessage(
                                        input.getClientId(context), message);
                            }
                        }
                    }
                } else {
                    throw e;
                }
            }
        }
    }
}

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