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package com.sun.xml.ws.config.management.jmx;

import com.sun.istack.logging.Logger;
import com.sun.xml.ws.metro.api.config.management.Configurator;
import com.sun.xml.ws.metro.api.config.management.ManagedEndpoint;
import com.sun.xml.ws.api.config.management.EndpointCreationAttributes;
import com.sun.xml.ws.metro.api.config.management.NamedParameters;
import com.sun.xml.ws.api.config.management.jmx.JmxConstants;
import com.sun.xml.ws.config.management.ManagementConstants;
import com.sun.xml.ws.config.management.ManagementMessages;

import javax.management.InvalidAttributeValueException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import javax.xml.ws.WebServiceException;

/**
 * Processes the input of new configuration data.
 *
 * @param  The endpoint implementation class.
 * 
 * @author Fabian Ritzmann
 */
class ReconfigAttribute implements MBeanAttribute {

    private static final Logger LOGGER = Logger.getLogger(ReconfigAttribute.class);

    private final ManagedEndpoint managedEndpoint;
    private final Configurator configurator;
    private final EndpointCreationAttributes endpointCreationAttributes;
    private final ClassLoader classLoader;

    public ReconfigAttribute(ManagedEndpoint endpoint, Configurator configurator,
            EndpointCreationAttributes creationAttributes, ClassLoader classLoader) {
        this.managedEndpoint = endpoint;
        this.configurator = configurator;
        this.endpointCreationAttributes = creationAttributes;
        this.classLoader = classLoader;
    }

    public boolean isReadable() {
        return false;
    }

    public boolean isWritable() {
        return true;
    }

    public String getDescription() {
        return ManagementMessages.RECONFIG_ATTRIBUTE_DESCRIPTION();
    }

    public OpenType getType() {
        return SimpleType.STRING;
    }

    public Object getValue() throws UnsupportedOperationException {
        throw new UnsupportedOperationException(
                ManagementMessages.WSM_5085_ATTRIBUTE_UNREADABLE(ManagementMessages.RECONFIG_ATTRIBUTE_NAME()));
    }

    public void setValue(Object value) throws InvalidAttributeValueException {
        if (String.class.isAssignableFrom(value.getClass())) {
            update((String) value);
        } else {
            throw LOGGER.logSevereException(new InvalidAttributeValueException(
                    ManagementMessages.WSM_5010_EXPECTED_STRING(
                    JmxConstants.SERVICE_POLICIES_ATTRIBUTE_NAME, value.getClass().getName())));
        }
    }

    private void update(String value) throws InvalidAttributeValueException {
        try {
            final NamedParameters parameters = new NamedParameters()
                    .put(ManagedEndpoint.ENDPOINT_INSTANCE_PARAMETER_NAME, this.managedEndpoint)
                    .put(ManagedEndpoint.CREATION_ATTRIBUTES_PARAMETER_NAME, this.endpointCreationAttributes)
                    .put(ManagedEndpoint.CLASS_LOADER_PARAMETER_NAME, this.classLoader)
                    .put(ManagementConstants.CONFIGURATION_DATA_PARAMETER_NAME, value);
            this.configurator.recreate(parameters);
        } catch (WebServiceException cause) {
            final InvalidAttributeValueException exception = new InvalidAttributeValueException(
                    ManagementMessages.WSM_5009_RECONFIGURATION_FAILED());
            LOGGER.logSevereException(cause);
            throw LOGGER.logSevereException(exception);
        }
    }

}