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- /*
- * Copyright (C) 2010, Mathias Kinzler <mathias.kinzler@sap.com>
- * Copyright (C) 2009, Constantine Plotnikov <constantine.plotnikov@gmail.com>
- * Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
- * Copyright (C) 2008-2012, Google Inc.
- * Copyright (C) 2009, JetBrains s.r.o.
- * Copyright (C) 2007-2008, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2006-2008, Shawn O. Pearce <spearce@spearce.org>
- * Copyright (C) 2008, Thad Hughes <thadh@thad.corp.google.com>
- * 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 static org.eclipse.jgit.util.StringUtils.compareIgnoreCase;
- import static org.eclipse.jgit.util.StringUtils.compareWithCase;
-
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.Comparator;
- import java.util.List;
- import java.util.Map;
- import java.util.concurrent.ConcurrentHashMap;
-
- class ConfigSnapshot {
- final List<ConfigLine> entryList;
- final Map<Object, Object> cache;
- final ConfigSnapshot baseState;
- volatile List<ConfigLine> sorted;
-
- ConfigSnapshot(List<ConfigLine> entries, ConfigSnapshot base) {
- entryList = entries;
- cache = new ConcurrentHashMap<Object, Object>(16, 0.75f, 1);
- baseState = base;
- }
-
- String[] get(String section, String subsection, String name) {
- List<ConfigLine> s = sorted();
- int idx = find(s, section, subsection, name);
- if (idx < 0)
- return null;
- int end = end(s, idx, section, subsection, name);
- String[] r = new String[end - idx];
- for (int i = 0; idx < end;)
- r[i++] = s.get(idx++).value;
- return r;
- }
-
- private int find(List<ConfigLine> s, String s1, String s2, String name) {
- int low = 0;
- int high = s.size();
- while (low < high) {
- int mid = (low + high) >>> 1;
- ConfigLine e = s.get(mid);
- int cmp = compare2(
- s1, s2, name,
- e.section, e.subsection, e.name);
- if (cmp < 0)
- high = mid;
- else if (cmp == 0)
- return first(s, mid, s1, s2, name);
- else
- low = mid + 1;
- }
- return -(low + 1);
- }
-
- private int first(List<ConfigLine> s, int i, String s1, String s2, String n) {
- while (0 < i) {
- if (s.get(i - 1).match(s1, s2, n))
- i--;
- else
- return i;
- }
- return i;
- }
-
- private int end(List<ConfigLine> s, int i, String s1, String s2, String n) {
- while (i < s.size()) {
- if (s.get(i).match(s1, s2, n))
- i++;
- else
- return i;
- }
- return i;
- }
-
- private List<ConfigLine> sorted() {
- List<ConfigLine> r = sorted;
- if (r == null)
- sorted = r = sort(entryList);
- return r;
- }
-
- private static List<ConfigLine> sort(List<ConfigLine> in) {
- List<ConfigLine> sorted = new ArrayList<ConfigLine>(in.size());
- for (ConfigLine line : in) {
- if (line.section != null && line.name != null)
- sorted.add(line);
- }
- Collections.sort(sorted, new LineComparator());
- return sorted;
- }
-
- private static int compare2(
- String aSection, String aSubsection, String aName,
- String bSection, String bSubsection, String bName) {
- int c = compareIgnoreCase(aSection, bSection);
- if (c != 0)
- return c;
-
- if (aSubsection == null && bSubsection != null)
- return -1;
- if (aSubsection != null && bSubsection == null)
- return 1;
- if (aSubsection != null) {
- c = compareWithCase(aSubsection, bSubsection);
- if (c != 0)
- return c;
- }
-
- return compareIgnoreCase(aName, bName);
- }
-
- private static class LineComparator implements Comparator<ConfigLine> {
- public int compare(ConfigLine a, ConfigLine b) {
- return compare2(
- a.section, a.subsection, a.name,
- b.section, b.subsection, b.name);
- }
- }
- }
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