/*
 * Copyright (c) 2008-2014 MongoDB, Inc.
 *
 * 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.bson;

/**
 * A field name validator, for use by BSON writers to validate field names as documents are encoded.
 *
 * @since 3.0
 */
public interface FieldNameValidator {
    /**
     * Returns true if the field name is valid, false otherwise.
     *
     * @param fieldName the field name
     * @return true if the field name is valid, false otherwise
     */
    boolean validate(String fieldName);

    /**
     * Gets a new validator to use for the value of the field with the given name.
     *
     * @param fieldName the field name
     * @return a non-null validator
     */
    FieldNameValidator getValidatorForField(String fieldName);
}
