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- /*
- * Copyright (C) 2010, Google Inc.
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.lib;
-
- /** A {@link Ref} that points directly at an {@link ObjectId}. */
- public abstract class ObjectIdRef implements Ref {
- /** Any reference whose peeled value is not yet known. */
- public static class Unpeeled extends ObjectIdRef {
- /**
- * Create a new ref pairing.
- *
- * @param st
- * method used to store this ref.
- * @param name
- * name of this ref.
- * @param id
- * current value of the ref. May be null to indicate a ref
- * that does not exist yet.
- */
- public Unpeeled(Storage st, String name, ObjectId id) {
- super(st, name, id);
- }
-
- public ObjectId getPeeledObjectId() {
- return null;
- }
-
- public boolean isPeeled() {
- return false;
- }
- }
-
- /** An annotated tag whose peeled object has been cached. */
- public static class PeeledTag extends ObjectIdRef {
- private final ObjectId peeledObjectId;
-
- /**
- * Create a new ref pairing.
- *
- * @param st
- * method used to store this ref.
- * @param name
- * name of this ref.
- * @param id
- * current value of the ref.
- * @param p
- * the first non-tag object that tag {@code id} points to.
- */
- public PeeledTag(Storage st, String name, ObjectId id, ObjectId p) {
- super(st, name, id);
- peeledObjectId = p;
- }
-
- public ObjectId getPeeledObjectId() {
- return peeledObjectId;
- }
-
- public boolean isPeeled() {
- return true;
- }
- }
-
- /** A reference to a non-tag object coming from a cached source. */
- public static class PeeledNonTag extends ObjectIdRef {
- /**
- * Create a new ref pairing.
- *
- * @param st
- * method used to store this ref.
- * @param name
- * name of this ref.
- * @param id
- * current value of the ref. May be null to indicate a ref
- * that does not exist yet.
- */
- public PeeledNonTag(Storage st, String name, ObjectId id) {
- super(st, name, id);
- }
-
- public ObjectId getPeeledObjectId() {
- return null;
- }
-
- public boolean isPeeled() {
- return true;
- }
- }
-
- private final String name;
-
- private final Storage storage;
-
- private final ObjectId objectId;
-
- /**
- * Create a new ref pairing.
- *
- * @param st
- * method used to store this ref.
- * @param name
- * name of this ref.
- * @param id
- * current value of the ref. May be null to indicate a ref that
- * does not exist yet.
- */
- protected ObjectIdRef(Storage st, String name, ObjectId id) {
- this.name = name;
- this.storage = st;
- this.objectId = id;
- }
-
- public String getName() {
- return name;
- }
-
- public boolean isSymbolic() {
- return false;
- }
-
- public Ref getLeaf() {
- return this;
- }
-
- public Ref getTarget() {
- return this;
- }
-
- public ObjectId getObjectId() {
- return objectId;
- }
-
- public Storage getStorage() {
- return storage;
- }
-
- @Override
- public String toString() {
- StringBuilder r = new StringBuilder();
- r.append("Ref[");
- r.append(getName());
- r.append('=');
- r.append(ObjectId.toString(getObjectId()));
- r.append(']');
- return r.toString();
- }
- }
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