package it.nch.yava.rte.wfm.services.mapper;

import java.util.HashMap;
import java.util.Map;

public class ServiceInfoMapperImpl implements ServiceInfoMapper {
    private Map map = new HashMap();
    
    public ServiceInfoSupplier getServiceInfo(ServiceName serviceName, String portName, String operationName) {
        return getServiceInfo(createServiceKey(serviceName, portName, operationName));
    }
    
    private ServiceInfoSupplier getServiceInfo(ServiceId key) {
        return (ServiceInfoSupplier) map.get(key);
    }
    
    public void addServiceInfo(ServiceName serviceName, String portName, String operationName, ServiceInfoSupplier serviceInfoSupplier) {
        addServiceInfo(createServiceKey(serviceName, portName, operationName), serviceInfoSupplier);
    }
    
    private void addServiceInfo(ServiceId key, ServiceInfoSupplier serviceInfoSupplier) {
        if (map.containsKey(key)) {
            throw new ServiceInfoMapperException("Service info key [" + key + "] already present in map!");
        }
        map.put(key, serviceInfoSupplier);
    }
    
    private static ServiceId createServiceKey(ServiceName serviceName, String portName, String operationName) {
        return new ServiceId(serviceName, portName, operationName);
    }

    private static class ServiceId {
        private final ServiceName serviceName;
        private final String portName;
        private final String operationName;
        
        public ServiceId(final ServiceName serviceName, final String portName, final String operationName) {
            checkParametersForValidity(serviceName, portName, operationName);
            this.serviceName = serviceName;
            this.portName = portName;
            this.operationName = operationName;
        }
        
        private void checkParametersForValidity(ServiceName serviceName, String portName, String operationName) {
            if (serviceName == null || portName == null || operationName == null) {
                throw new IllegalArgumentException("Arguments in ServiceId cannot be null!");
            }
        }

        @Override
        public boolean equals(Object obj) {
            boolean result = false;
            if (obj instanceof ServiceId) {
                ServiceId oKey = (ServiceId) obj;
                result = serviceName.equals(oKey.serviceName) && 
                portName.equals(oKey.portName) && 
                operationName.equals(oKey.operationName);
            }
            return result;
        }

        @Override
        public int hashCode() {
            int result = 17;
            result *= 37 + serviceName.hashCode(); 
            result *= 37 + portName.hashCode(); 
            result *= 37 + operationName.hashCode(); 
            return result;
        }

        @Override
        public String toString() {
            return "[serviceName=[" + serviceName + "] portName=[" + portName + "] operationName=[" + operationName + "]]";
        }
    }
}