platform/sensinact-core/src/main/java/org/eclipse/sensinact/gateway/core/UnaccessibleModelElementProxyWrapper.java

/*
* Copyright (c) 2020 Kentyou.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
*    Kentyou - initial API and implementation
 */
package org.eclipse.sensinact.gateway.core;

import java.util.Collections;
import java.util.Enumeration;

import org.eclipse.sensinact.gateway.common.primitive.Description;
import org.eclipse.sensinact.gateway.common.primitive.Nameable;
import org.eclipse.sensinact.gateway.core.message.SnaErrorfulMessage;

/**
 *
 * @author <a href="mailto:christophe.munilla@cea.fr">Christophe Munilla</a>
 */
public class UnaccessibleModelElementProxyWrapper
		extends ElementsProxyWrapper<UnaccessibleModelElementProxy, Nameable> {
	// ********************************************************************//
	// NESTED DECLARATIONS //
	// ********************************************************************//

	// ********************************************************************//
	// ABSTRACT DECLARATIONS //
	// ********************************************************************//

	// ********************************************************************//
	// STATIC DECLARATIONS //
	// ********************************************************************//

	// ********************************************************************//
	// INSTANCE DECLARATIONS //
	// ********************************************************************//

	/**
	 * @param modelElement
	 * @param proxy
	 * @param tree
	 */
	protected UnaccessibleModelElementProxyWrapper(UnaccessibleModelElementProxy proxy) {
		super(proxy);
	}

	/**
	 * @inheritDoc
	 *
	 * @see org.eclipse.sensinact.gateway.common.primitive.ElementsProxy#element(java.lang.String)
	 */
	@Override
	public Nameable element(String name) {
		return null;
	}

	/**
	 * @inheritDoc
	 *
	 * @see org.eclipse.sensinact.gateway.common.primitive.ElementsProxy#elements()
	 */
	@Override
	public Enumeration<Nameable> elements() {
		return Collections.<Nameable>emptyEnumeration();
	}

	/**
	 * @inheritDoc
	 *
	 * @see org.eclipse.sensinact.gateway.common.primitive.ElementsProxy#isAccessible()
	 */
	@Override
	public boolean isAccessible() {
		return false;
	}

	/**
	 * @inheritDoc
	 *
	 * @see org.eclipse.sensinact.gateway.common.primitive.Describable#getDescription()
	 */
	@Override
	public Description getDescription() {
		return new Description() {
			@Override
			public String getJSON() {
				return getJSONDescription();
			}

			@Override
			public String getName() {
				return proxy.getName();
			}

			@Override
			public String getJSONDescription() {
				StringBuilder builder = new StringBuilder();
				builder.append("{\"type\":\"DESCRIBE_ERROR\",\"statusCode\":");
				builder.append(SnaErrorfulMessage.FORBIDDEN_ERROR_CODE);
				builder.append(",\"errors\":[");
				builder.append("{\"message\":\"Unaccessible object\",\"trace\":[]}]}");
				return builder.toString();
			}
		};
	}

}