| /*=============================================================================# |
| # Copyright (c) 2010, 2019 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.rj.renv.core; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| |
| @NonNullByDefault |
| public abstract class REnv { |
| |
| |
| private final String id; |
| |
| |
| public REnv(final String id) { |
| this.id= id; |
| } |
| |
| |
| /** |
| * The id of the R environment. |
| * |
| * The id of an instance of {@link REnv} and its configurations never changes. |
| * |
| * @return the id |
| */ |
| public final String getId() { |
| return this.id; |
| } |
| |
| /** |
| * The current name of the R environment. |
| * |
| * @return the name |
| */ |
| public abstract String getName(); |
| |
| /** |
| * Resolves virtual references (like workbench default) to references of a real configuration. |
| * |
| * A virtual reference can return <code>null</code>, if it doesn't currently point to a valid |
| * configuration. A reference of a real configuration always return itself. |
| * |
| * @return the final reference, if available, otherwise <code>null</code>. |
| */ |
| public abstract @Nullable REnv resolve(); |
| |
| |
| /** |
| * Resolves finally the reference and returns the configuration, if available. |
| * |
| * @return the configuration if available, otherwise <code>null</code>. |
| */ |
| public abstract <T> @Nullable T get(Class<T> type); |
| |
| |
| public boolean isDeleted() { |
| return false; |
| } |
| |
| |
| @Override |
| public int hashCode() { |
| return this.id.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final @Nullable Object obj) { |
| return (this == obj |
| || (obj instanceof REnv && this.id.equals(((REnv) obj).getId())) ); |
| } |
| |
| } |