api/src/main/java/org/apache/fineract/cn/portfolio/api/v1/validation/CheckValidSortColumn.java

/*
 * 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.
 */
package org.apache.fineract.cn.portfolio.api.v1.validation;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * @author Myrle Krantz
 */
@SuppressWarnings("WeakerAccess")
public class CheckValidSortColumn implements ConstraintValidator<ValidSortColumn, String> {
  private Set<String> allowableColumns;

  @Override
  public void initialize(final ValidSortColumn constraintAnnotation) {
    allowableColumns = new HashSet<>(Arrays.asList(constraintAnnotation.value()));
  }

  @Override
  public boolean isValid(final String value, final ConstraintValidatorContext context) {
    return validate(value, allowableColumns);
  }

  public static boolean validate(String value, Set<String> allowableColumns) {
    return value == null || allowableColumns.contains(value);
  }
}