org.eclipse.jgit.errors.LargeObjectException.java Source code

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Here is the source code for org.eclipse.jgit.errors.LargeObjectException.java

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/*
 * Copyright (C) 2010, Google Inc.
 * 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.errors;

import java.text.MessageFormat;

import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;

/**
 * An object is too big to load into memory as a single byte array.
 */
public class LargeObjectException extends RuntimeException {
    private static final long serialVersionUID = 1L;

    private ObjectId objectId;

    /**
     * Create a large object exception, where the object isn't known.
     */
    public LargeObjectException() {
        // Do nothing.
    }

    /**
     * Create a large object exception, where the object isn't known.
     *
     * @param cause
     *            the cause
     * @since 4.10
     */
    public LargeObjectException(Throwable cause) {
        initCause(cause);
    }

    /**
     * Create a large object exception, naming the object that is too big.
     *
     * @param id
     *            identity of the object that is too big to be loaded as a byte
     *            array in this JVM.
     */
    public LargeObjectException(AnyObjectId id) {
        setObjectId(id);
    }

    /**
     * Get identity of the object that is too large; may be null
     *
     * @return identity of the object that is too large; may be null
     */
    public ObjectId getObjectId() {
        return objectId;
    }

    /**
     * Get the hex encoded name of the object, or 'unknown object'
     *
     * @return either the hex encoded name of the object, or 'unknown object'
     */
    protected String getObjectName() {
        if (getObjectId() != null)
            return getObjectId().name();
        return JGitText.get().unknownObject;
    }

    /**
     * Set the identity of the object, if its not already set.
     *
     * @param id
     *            the id of the object that is too large to process.
     */
    public void setObjectId(AnyObjectId id) {
        if (objectId == null)
            objectId = id.copy();
    }

    /** {@inheritDoc} */
    @Override
    public String getMessage() {
        return MessageFormat.format(JGitText.get().largeObjectException, getObjectName());
    }

    /** An error caused by the JVM being out of heap space. */
    public static class OutOfMemory extends LargeObjectException {
        private static final long serialVersionUID = 1L;

        /**
         * Construct a wrapper around the original OutOfMemoryError.
         *
         * @param cause
         *            the original root cause.
         */
        public OutOfMemory(OutOfMemoryError cause) {
            initCause(cause);
        }

        @Override
        public String getMessage() {
            return MessageFormat.format(JGitText.get().largeObjectOutOfMemory, getObjectName());
        }
    }

    /** Object size exceeds JVM limit of 2 GiB per byte array. */
    public static class ExceedsByteArrayLimit extends LargeObjectException {
        private static final long serialVersionUID = 1L;

        @Override
        public String getMessage() {
            return MessageFormat.format(JGitText.get().largeObjectExceedsByteArray, getObjectName());
        }
    }

    /** Object size exceeds the caller's upper limit. */
    public static class ExceedsLimit extends LargeObjectException {
        private static final long serialVersionUID = 1L;

        private final long limit;

        private final long size;

        /**
         * Construct an exception for a particular size being exceeded.
         *
         * @param limit
         *            the limit the caller imposed on the object.
         * @param size
         *            the actual size of the object.
         */
        public ExceedsLimit(long limit, long size) {
            this.limit = limit;
            this.size = size;
        }

        @Override
        public String getMessage() {
            return MessageFormat.format(JGitText.get().largeObjectExceedsLimit, getObjectName(),
                    Long.valueOf(limit), Long.valueOf(size));
        }
    }
}