NotBlankValidator.java
/*
* Copyright 2021 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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.
*/
package org.keycloak.validate.validators;
import java.util.Collection;
import org.keycloak.validate.SimpleValidator;
import org.keycloak.validate.ValidationContext;
import org.keycloak.validate.ValidationError;
import org.keycloak.validate.ValidatorConfig;
/**
* Validate that value exists and is not empty nor blank. Supports String and collection of Strings as input. For
* collection of Strings input has to contain at least one element and it have to be non-blank to satisfy this
* validation. If collection contains something else than String, or if even one String in it is blank, then this
* validation fails.
*
* @see NotEmptyValidator
*/
public class NotBlankValidator implements SimpleValidator {
public static final String ID = "not-blank";
public static final String MESSAGE_BLANK = "error-invalid-blank";
public static final NotBlankValidator INSTANCE = new NotBlankValidator();
@Override
public String getId() {
return ID;
}
@Override
public ValidationContext validate(Object input, String inputHint, ValidationContext context, ValidatorConfig config) {
if (input == null) {
context.addError(new ValidationError(ID, inputHint, MESSAGE_BLANK, input));
} else if (input instanceof String) {
validateStringValue((String) input, inputHint, context, config);
} else if (input instanceof Collection) {
@SuppressWarnings("unchecked")
Collection<Object> values = (Collection<Object>) input;
if (!values.isEmpty()) {
for (Object value : values) {
if (!(value instanceof String)) {
context.addError(new ValidationError(getId(), inputHint, ValidationError.MESSAGE_INVALID_VALUE, input));
return context;
} else if (!validateStringValue((String) value, inputHint, context, config)) {
return context;
}
}
} else {
context.addError(new ValidationError(ID, inputHint, MESSAGE_BLANK, input));
}
} else {
context.addError(new ValidationError(ID, inputHint, ValidationError.MESSAGE_INVALID_VALUE, input));
}
return context;
}
protected boolean validateStringValue(String value, String inputHint, ValidationContext context, ValidatorConfig config) {
if (value == null || value.trim().length() == 0) {
context.addError(new ValidationError(ID, inputHint, MESSAGE_BLANK, value));
return false;
}
return true;
}
}