| /* |
| * 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; |
| |
| import org.eclipse.jgit.annotations.NonNull; |
| import org.eclipse.jgit.annotations.Nullable; |
| |
| /** |
| * A {@link org.eclipse.jgit.lib.Ref} that points directly at an |
| * {@link org.eclipse.jgit.lib.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 {@code null} to indicate |
| * a ref that does not exist yet. |
| */ |
| public Unpeeled(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id) { |
| super(st, name, id, -1); |
| } |
| |
| /** |
| * Create a new ref pairing with update index. |
| * |
| * @param st |
| * method used to store this ref. |
| * @param name |
| * name of this ref. |
| * @param id |
| * current value of the ref. May be {@code null} to indicate |
| * a ref that does not exist yet. |
| * @param updateIndex |
| * number increasing with each update to the reference. |
| * @since 5.3 |
| */ |
| public Unpeeled(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id, long updateIndex) { |
| super(st, name, id, updateIndex); |
| } |
| |
| @Override |
| @Nullable |
| public ObjectId getPeeledObjectId() { |
| return null; |
| } |
| |
| @Override |
| 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(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id, @NonNull ObjectId p) { |
| super(st, name, id, -1); |
| peeledObjectId = p; |
| } |
| |
| /** |
| * Create a new ref pairing with update index. |
| * |
| * @param st |
| * method used to store this ref. |
| * @param name |
| * name of this ref. |
| * @param id |
| * current value of the ref. May be {@code null} to indicate |
| * a ref that does not exist yet. |
| * @param p |
| * the first non-tag object that tag {@code id} points to. |
| * @param updateIndex |
| * number increasing with each update to the reference. |
| * @since 5.3 |
| */ |
| public PeeledTag(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id, @NonNull ObjectId p, long updateIndex) { |
| super(st, name, id, updateIndex); |
| peeledObjectId = p; |
| } |
| |
| @Override |
| @NonNull |
| public ObjectId getPeeledObjectId() { |
| return peeledObjectId; |
| } |
| |
| @Override |
| 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 {@code null} to indicate |
| * a ref that does not exist yet. |
| */ |
| public PeeledNonTag(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id) { |
| super(st, name, id, -1); |
| } |
| |
| /** |
| * Create a new ref pairing with update index. |
| * |
| * @param st |
| * method used to store this ref. |
| * @param name |
| * name of this ref. |
| * @param id |
| * current value of the ref. May be {@code null} to indicate |
| * a ref that does not exist yet. |
| * @param updateIndex |
| * number increasing with each update to the reference. |
| * @since 5.3 |
| */ |
| public PeeledNonTag(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id, long updateIndex) { |
| super(st, name, id, updateIndex); |
| } |
| |
| @Override |
| @Nullable |
| public ObjectId getPeeledObjectId() { |
| return null; |
| } |
| |
| @Override |
| public boolean isPeeled() { |
| return true; |
| } |
| } |
| |
| private final String name; |
| |
| private final Storage storage; |
| |
| private final ObjectId objectId; |
| |
| private final long updateIndex; |
| |
| /** |
| * 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 {@code null} to indicate a |
| * ref that does not exist yet. |
| * @param updateIndex |
| * number that increases with each ref update. Set to -1 if the |
| * storage doesn't support versioning. |
| * @since 5.3 |
| */ |
| protected ObjectIdRef(@NonNull Storage st, @NonNull String name, |
| @Nullable ObjectId id, long updateIndex) { |
| this.name = name; |
| this.storage = st; |
| this.objectId = id; |
| this.updateIndex = updateIndex; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @NonNull |
| public String getName() { |
| return name; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean isSymbolic() { |
| return false; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @NonNull |
| public Ref getLeaf() { |
| return this; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @NonNull |
| public Ref getTarget() { |
| return this; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @Nullable |
| public ObjectId getObjectId() { |
| return objectId; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @NonNull |
| public Storage getStorage() { |
| return storage; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @since 5.3 |
| */ |
| @Override |
| public long getUpdateIndex() { |
| if (updateIndex == -1) { |
| throw new UnsupportedOperationException(); |
| } |
| return updateIndex; |
| } |
| |
| /** {@inheritDoc} */ |
| @NonNull |
| @Override |
| public String toString() { |
| StringBuilder r = new StringBuilder(); |
| r.append("Ref["); //$NON-NLS-1$ |
| r.append(getName()); |
| r.append('='); |
| r.append(ObjectId.toString(getObjectId())); |
| r.append('('); |
| r.append(updateIndex); // Print value, even if -1 |
| r.append(")]"); //$NON-NLS-1$ |
| return r.toString(); |
| } |
| } |