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- /*
- * 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.filter;
-
- import java.io.IOException;
-
- import org.eclipse.jgit.errors.IncorrectObjectTypeException;
- import org.eclipse.jgit.errors.MissingObjectException;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevWalk;
- import org.eclipse.jgit.util.RawCharSequence;
- import org.eclipse.jgit.util.RawSubStringPattern;
-
- /**
- * Abstract filter that searches text using only substring search.
- */
- public abstract class SubStringRevFilter extends RevFilter {
- /**
- * Can this string be safely handled by a substring filter?
- *
- * @param pattern
- * the pattern text proposed by the user.
- * @return true if a substring filter can perform this pattern match; false
- * if {@link org.eclipse.jgit.revwalk.filter.PatternMatchRevFilter}
- * must be used instead.
- */
- public static boolean safe(final String pattern) {
- for (int i = 0; i < pattern.length(); i++) {
- final char c = pattern.charAt(i);
- switch (c) {
- case '.':
- case '?':
- case '*':
- case '+':
- case '{':
- case '}':
- case '(':
- case ')':
- case '[':
- case ']':
- case '\\':
- return false;
- }
- }
- return true;
- }
-
- private final RawSubStringPattern pattern;
-
- /**
- * Construct a new matching filter.
- *
- * @param patternText
- * text to locate. This should be a safe string as described by
- * the {@link #safe(String)} as regular expression meta
- * characters are treated as literals.
- */
- protected SubStringRevFilter(final String patternText) {
- pattern = new RawSubStringPattern(patternText);
- }
-
- /** {@inheritDoc} */
- @Override
- public boolean include(final RevWalk walker, final RevCommit cmit)
- throws MissingObjectException, IncorrectObjectTypeException,
- IOException {
- return pattern.match(text(cmit)) >= 0;
- }
-
- /** {@inheritDoc} */
- @Override
- public boolean requiresCommitBody() {
- return true;
- }
-
- /**
- * Obtain the raw text to match against.
- *
- * @param cmit
- * current commit being evaluated.
- * @return sequence for the commit's content that we need to match on.
- */
- protected abstract RawCharSequence text(RevCommit cmit);
-
- /** {@inheritDoc} */
- @Override
- public RevFilter clone() {
- return this; // Typically we are actually thread-safe.
- }
-
- /** {@inheritDoc} */
- @SuppressWarnings("nls")
- @Override
- public String toString() {
- return super.toString() + "(\"" + pattern.pattern() + "\")";
- }
- }
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