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package org.glassfish.connectors.config.validators;

import org.glassfish.connectors.config.ConnectorConnectionPool;
import com.sun.enterprise.config.serverbeans.ResourcePool;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.glassfish.config.support.Constants;

/**
 * Implementation for Connection Pool validation.
 * Following validations are done :
 * - Validation of datasource/driver classnames when resource type is not null 
 * - Max pool size to be always higher than steady pool size
 * - Check if statement wrapping is on when certain features are enabled.
 * 
 * @author Shalini M
 */
public class ConnectionPoolValidator
    implements ConstraintValidator {
    
    protected ConnectionPoolErrorMessages poolFaults;
    
    public void initialize(final ConnectionPoolConstraint constraint) {
        this.poolFaults = constraint.value();
    }

    @Override
    public boolean isValid(final ResourcePool pool,
        final ConstraintValidatorContext constraintValidatorContext) {

        if (poolFaults == ConnectionPoolErrorMessages.MAX_STEADY_INVALID) {
            if (pool instanceof ConnectorConnectionPool) {
                ConnectorConnectionPool connPool = (ConnectorConnectionPool) pool;
                String maxPoolSize = connPool.getMaxPoolSize();
                String steadyPoolSize = connPool.getSteadyPoolSize();
                if(steadyPoolSize == null) {
                    steadyPoolSize = Constants.DEFAULT_STEADY_POOL_SIZE;
                }
                if (maxPoolSize == null) {
                    maxPoolSize = Constants.DEFAULT_MAX_POOL_SIZE;
                }
                if (Integer.parseInt(maxPoolSize) <
                        (Integer.parseInt(steadyPoolSize))) {
                    //max pool size fault
                    return false;
                }                
            }
        }
        return true;
    }
}