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- /*
- * Copyright (C) 2019, Google LLC.
- * 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.transport;
-
- import java.text.MessageFormat;
-
- import org.eclipse.jgit.errors.PackProtocolException;
- import org.eclipse.jgit.internal.JGitText;
-
- /**
- * Represents either a filter specified in a protocol "filter" line, or a
- * placeholder to indicate no filtering.
- *
- * @since 5.4
- */
- public final class FilterSpec {
-
- private final long blobLimit;
-
- private FilterSpec(long blobLimit) {
- this.blobLimit = blobLimit;
- }
-
- /**
- * Process the content of "filter" line from the protocol. It has a shape
- * like "blob:none" or "blob:limit=N", with limit a positive number.
- *
- * @param filterLine
- * the content of the "filter" line in the protocol
- * @return a FilterSpec representing the given filter
- * @throws PackProtocolException
- * invalid filter because due to unrecognized format or
- * negative/non-numeric filter.
- */
- public static FilterSpec fromFilterLine(String filterLine)
- throws PackProtocolException {
- long blobLimit = -1;
-
- if (filterLine.equals("blob:none")) { //$NON-NLS-1$
- blobLimit = 0;
- } else if (filterLine.startsWith("blob:limit=")) { //$NON-NLS-1$
- try {
- blobLimit = Long
- .parseLong(filterLine.substring("blob:limit=".length())); //$NON-NLS-1$
- } catch (NumberFormatException e) {
- throw new PackProtocolException(MessageFormat
- .format(JGitText.get().invalidFilter, filterLine));
- }
- }
- /*
- * We must have (1) either "blob:none" or "blob:limit=" set (because we
- * only support blob size limits for now), and (2) if the latter, then
- * it must be nonnegative. Throw if (1) or (2) is not met.
- */
- if (blobLimit < 0) {
- throw new PackProtocolException(
- MessageFormat.format(
- JGitText.get().invalidFilter, filterLine));
- }
-
- return new FilterSpec(blobLimit);
- }
-
- /**
- * @param blobLimit
- * the blob limit in a "blob:[limit]" or "blob:none" filter line
- * @return a filter spec which filters blobs above a certain size
- */
- static FilterSpec withBlobLimit(long blobLimit) {
- if (blobLimit < 0) {
- throw new IllegalArgumentException(
- "blobLimit cannot be negative: " + blobLimit); //$NON-NLS-1$
- }
- return new FilterSpec(blobLimit);
- }
-
- /**
- * A placeholder that indicates no filtering.
- */
- public static final FilterSpec NO_FILTER = new FilterSpec(-1);
-
- /**
- * @return -1 if this filter does not filter blobs based on size, or a
- * non-negative integer representing the max size of blobs to allow
- */
- public long getBlobLimit() {
- return blobLimit;
- }
-
- /**
- * @return true if this filter doesn't filter out anything
- */
- public boolean isNoOp() {
- return blobLimit == -1;
- }
-
- }
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