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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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 com.rapiddweller.common.validator.domain;

import com.rapiddweller.common.BeanUtil;
import com.rapiddweller.common.Filter;
import com.rapiddweller.common.ValidationDomainDescriptor;
import com.rapiddweller.common.Validator;
import com.rapiddweller.common.filter.FilterUtil;

import java.lang.reflect.Modifier;
import java.util.List;

/**
 * Default implementation of the {@link ValidationDomainDescriptor} interface.
 * Created: 20.12.2011 16:53:55
 *
 * @author Volker Bergmann
 * @since 0.5.14
 */
public class DefaultValidationDomainDescriptor extends AbstractValidationDomainDescriptor {

  private List>> validatorClasses;

  /**
   * This constructor is assumed to be used by child classes - it used the child class' package name
   * to search Validator instances.
   */
  protected DefaultValidationDomainDescriptor() {
    init(getClass().getPackage().getName());
  }

  /**
   * Instantiates a new Default validation domain descriptor.
   *
   * @param packageName the package name
   */
  public DefaultValidationDomainDescriptor(String packageName) {
    init(packageName);
  }

  @SuppressWarnings({"unchecked", "rawtypes"})
  private void init(String packageName) {
    List> candidates = BeanUtil.getClasses(packageName);
    this.validatorClasses = (List) FilterUtil.filter(candidates, new ValidatorClassFilter());
  }

  /**
   * The type Validator class filter.
   */
  public static class ValidatorClassFilter implements Filter> {
    @Override
    public boolean accept(Class candidate) {
      return Validator.class.isAssignableFrom(candidate)
          && !Modifier.isAbstract(candidate.getModifiers());
    }
  }

  @Override
  public List>> getValidatorClasses() {
    return validatorClasses;
  }

}