Java tutorial
/* * 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.revwalk; import java.io.IOException; import org.eclipse.jgit.errors.IncorrectObjectTypeException; import org.eclipse.jgit.errors.MissingObjectException; import org.eclipse.jgit.lib.AnyObjectId; import org.eclipse.jgit.lib.Constants; import org.eclipse.jgit.lib.ObjectId; import org.eclipse.jgit.lib.ObjectIdOwnerMap; /** * Base object type accessed during revision walking. */ public abstract class RevObject extends ObjectIdOwnerMap.Entry { static final int PARSED = 1; int flags; RevObject(AnyObjectId name) { super(name); } abstract void parseHeaders(RevWalk walk) throws MissingObjectException, IncorrectObjectTypeException, IOException; abstract void parseBody(RevWalk walk) throws MissingObjectException, IncorrectObjectTypeException, IOException; /** * Get Git object type. See {@link org.eclipse.jgit.lib.Constants}. * * @return object type */ public abstract int getType(); /** * Get the name of this object. * * @return unique hash of this object. */ public final ObjectId getId() { return this; } /** * Test to see if the flag has been set on this object. * * @param flag * the flag to test. * @return true if the flag has been added to this object; false if not. */ public final boolean has(RevFlag flag) { return (flags & flag.mask) != 0; } /** * Test to see if any flag in the set has been set on this object. * * @param set * the flags to test. * @return true if any flag in the set has been added to this object; false * if not. */ public final boolean hasAny(RevFlagSet set) { return (flags & set.mask) != 0; } /** * Test to see if all flags in the set have been set on this object. * * @param set * the flags to test. * @return true if all flags of the set have been added to this object; * false if some or none have been added. */ public final boolean hasAll(RevFlagSet set) { return (flags & set.mask) == set.mask; } /** * Add a flag to this object. * <p> * If the flag is already set on this object then the method has no effect. * * @param flag * the flag to mark on this object, for later testing. */ public final void add(RevFlag flag) { flags |= flag.mask; } /** * Add a set of flags to this object. * * @param set * the set of flags to mark on this object, for later testing. */ public final void add(RevFlagSet set) { flags |= set.mask; } /** * Remove a flag from this object. * <p> * If the flag is not set on this object then the method has no effect. * * @param flag * the flag to remove from this object. */ public final void remove(RevFlag flag) { flags &= ~flag.mask; } /** * Remove a set of flags from this object. * * @param set * the flag to remove from this object. */ public final void remove(RevFlagSet set) { flags &= ~set.mask; } /** {@inheritDoc} */ @Override public String toString() { final StringBuilder s = new StringBuilder(); s.append(Constants.typeString(getType())); s.append(' '); s.append(name()); s.append(' '); appendCoreFlags(s); return s.toString(); } /** * Append a debug description of core RevFlags to a buffer. * * @param s * buffer to append a debug description of core RevFlags onto. */ protected void appendCoreFlags(StringBuilder s) { s.append((flags & RevWalk.TOPO_DELAY) != 0 ? 'o' : '-'); s.append((flags & RevWalk.TEMP_MARK) != 0 ? 't' : '-'); s.append((flags & RevWalk.REWRITE) != 0 ? 'r' : '-'); s.append((flags & RevWalk.UNINTERESTING) != 0 ? 'u' : '-'); s.append((flags & RevWalk.SEEN) != 0 ? 's' : '-'); s.append((flags & RevWalk.PARSED) != 0 ? 'p' : '-'); } }