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package com.sun.enterprise.config.serverbeans.customvalidators;

import com.sun.enterprise.config.serverbeans.ConfigBeansUtilities;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.Cluster;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.Node;
import com.sun.enterprise.config.serverbeans.Domain;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.glassfish.api.admin.config.Named;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.api.ServiceLocatorFactory;


/**
 * Validation logic for NotDuplicateTargetName constraint
 *
 * @author Joe Di Pol
 */
public class NotDuplicateTargetNameValidator implements
                        ConstraintValidator {

    Domain domain = null;

    @Override
    public void initialize(NotDuplicateTargetName constraintAnnotation) {
    	ServiceLocator locator = ServiceLocatorFactory.getInstance().find("default");
    	if (locator == null) return;
    	
    	ConfigBeansUtilities cbu = locator.getService(ConfigBeansUtilities.class);
    	if (cbu == null) return;
    	
        domain = cbu.getDomain();
    }

    @Override
    public boolean isValid(Named bean, ConstraintValidatorContext context ) {

        // When we search for name clashes we typically do not check the
        // type of object being created since that check has already been
        // done by the config framework, and checking for duplicates is not cheap
        // We use these booleans for readability
        boolean checkCluster = true;
        boolean checkConfig = true;
        boolean checkNode = true;
        boolean checkServer = true;

        if (bean instanceof Server) {
            checkServer = false;
        } else if (bean instanceof Cluster) {
            checkCluster = false;
        } else if (bean instanceof Config) {
            checkConfig = false;
        } else if (bean instanceof Node) {
            checkNode = false;
        } else {
            // Unknown bean type. In this case we just go ahead and check
            // against Server, Cluster, Config, and Node
        }

        String name = bean.getName();

        if (domain == null) {
            return true;
        }

        if ((checkCluster && domain.getClusterNamed(name) != null) ||
            (checkConfig  && domain.getConfigNamed(name) != null) ||
            (checkNode    && domain.getNodeNamed(name) != null) ||
            (checkServer  && domain.getServerNamed(name) != null)) {
            return false;
        } else {
           return true;
        }
    }
}