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/*******************************************************************************
 * Copyright 2012 Anteros Tecnologia
 *  
 * 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 br.com.anteros.bean.validation;

import br.com.anteros.validation.api.ConstraintValidator;
import br.com.anteros.validation.api.Path;

/**
 * Class that stores the needed properties to ensure that a validation is not
 * checked more than once.
 * 
 * These properties are:
 * 

 * The ref of the bean to which the validation would be applied.
 * The path of the property.
 * The ref of the {@link ConstraintValidator}.
 * 
 * 
 * @author Carlos Vara
 */
final class ConstraintValidatorIdentity {

    private final Object bean;
    private final Path path;
    private final ConstraintValidator constraintValidator;

    /**
     * Create a new ConstraintValidatorIdentity instance.
     * @param bean
     * @param path
     * @param constraintValidator
     */
    public ConstraintValidatorIdentity(Object bean, Path path, ConstraintValidator constraintValidator) {
        this.bean = bean;
        this.path = path;
        this.constraintValidator = constraintValidator;
    }

    /**
     * Get the referenced bean.
     * @return Object
     */
    public Object getBean() {
        return bean;
    }

    /**
     * Get the referenced property {@link Path}.
     * @return Path
     */
    public Path getPath() {
        return path;
    }

    /**
     * Get the associated {@link ConstraintValidator}.
     * @return {@link ConstraintValidator}
     */
    public ConstraintValidator getConstraintValidator() {
        return constraintValidator;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (!(obj instanceof ConstraintValidatorIdentity)) {
            return false;
        }

        ConstraintValidatorIdentity other = (ConstraintValidatorIdentity) obj;

        // Bean ref must be the same
        if (this.bean != other.bean) {
            return false;
        }

        // ConstraintValidator ref must be the same
        if (this.constraintValidator != other.constraintValidator) {
            return false;
        }

        // Path must be equals
        if (!this.path.equals(other.path)) {
            return false;
        }

        return true;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result
                + ((this.bean == null) ? 0 : this.bean.hashCode());
        result = prime * result
                + ((this.path == null) ? 0 : this.path.hashCode());
        result = prime * result
                + ((this.constraintValidator == null) ? 0 : this.constraintValidator.hashCode());
        return result;
    }

}