| /* |
| * 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 others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.lib; |
| |
| import static org.eclipse.jgit.util.StringUtils.compareIgnoreCase; |
| import static org.eclipse.jgit.util.StringUtils.compareWithCase; |
| import static org.eclipse.jgit.util.StringUtils.toLowerCase; |
| |
| import java.util.AbstractSet; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.eclipse.jgit.util.StringUtils; |
| |
| class ConfigSnapshot { |
| final List<ConfigLine> entryList; |
| final Map<Object, Object> cache; |
| final ConfigSnapshot baseState; |
| volatile List<ConfigLine> sorted; |
| volatile SectionNames names; |
| |
| ConfigSnapshot(List<ConfigLine> entries, ConfigSnapshot base) { |
| entryList = entries; |
| cache = new ConcurrentHashMap<>(16, 0.75f, 1); |
| baseState = base; |
| } |
| |
| Set<String> getSections() { |
| return names().sections; |
| } |
| |
| Set<String> getSubsections(String section) { |
| Map<String, Set<String>> m = names().subsections; |
| Set<String> r = m.get(section); |
| if (r == null) |
| r = m.get(toLowerCase(section)); |
| if (r == null) |
| return Collections.emptySet(); |
| return Collections.unmodifiableSet(r); |
| } |
| |
| Set<String> getNames(String section, String subsection) { |
| return getNames(section, subsection, false); |
| } |
| |
| Set<String> getNames(String section, String subsection, boolean recursive) { |
| Map<String, String> m = getNamesInternal(section, subsection, recursive); |
| return new CaseFoldingSet(m); |
| } |
| |
| private Map<String, String> getNamesInternal(String section, |
| String subsection, boolean recursive) { |
| List<ConfigLine> s = sorted(); |
| int idx = find(s, section, subsection, ""); //$NON-NLS-1$ |
| if (idx < 0) |
| idx = -(idx + 1); |
| |
| Map<String, String> m = new LinkedHashMap<>(); |
| while (idx < s.size()) { |
| ConfigLine e = s.get(idx++); |
| if (!e.match(section, subsection)) |
| break; |
| if (e.name == null) |
| continue; |
| String l = toLowerCase(e.name); |
| if (!m.containsKey(l)) |
| m.put(l, e.name); |
| } |
| if (recursive && baseState != null) |
| m.putAll(baseState.getNamesInternal(section, subsection, recursive)); |
| return m; |
| } |
| |
| 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<>(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> { |
| @Override |
| public int compare(ConfigLine a, ConfigLine b) { |
| return compare2( |
| a.section, a.subsection, a.name, |
| b.section, b.subsection, b.name); |
| } |
| } |
| |
| private SectionNames names() { |
| SectionNames n = names; |
| if (n == null) |
| names = n = new SectionNames(this); |
| return n; |
| } |
| |
| private static class SectionNames { |
| final CaseFoldingSet sections; |
| final Map<String, Set<String>> subsections; |
| |
| SectionNames(ConfigSnapshot cfg) { |
| Map<String, String> sec = new LinkedHashMap<>(); |
| Map<String, Set<String>> sub = new HashMap<>(); |
| while (cfg != null) { |
| for (ConfigLine e : cfg.entryList) { |
| if (e.section == null) |
| continue; |
| |
| String l1 = toLowerCase(e.section); |
| if (!sec.containsKey(l1)) |
| sec.put(l1, e.section); |
| |
| if (e.subsection == null) |
| continue; |
| |
| Set<String> m = sub.get(l1); |
| if (m == null) { |
| m = new LinkedHashSet<>(); |
| sub.put(l1, m); |
| } |
| m.add(e.subsection); |
| } |
| cfg = cfg.baseState; |
| } |
| |
| sections = new CaseFoldingSet(sec); |
| subsections = sub; |
| } |
| } |
| |
| private static class CaseFoldingSet extends AbstractSet<String> { |
| private final Map<String, String> names; |
| |
| CaseFoldingSet(Map<String, String> names) { |
| this.names = names; |
| } |
| |
| @Override |
| public boolean contains(Object needle) { |
| if (needle instanceof String) { |
| String n = (String) needle; |
| return names.containsKey(n) |
| || names.containsKey(StringUtils.toLowerCase(n)); |
| } |
| return false; |
| } |
| |
| @Override |
| public Iterator<String> iterator() { |
| final Iterator<String> i = names.values().iterator(); |
| return new Iterator<String>() { |
| @Override |
| public boolean hasNext() { |
| return i.hasNext(); |
| } |
| |
| @Override |
| public String next() { |
| return i.next(); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| @Override |
| public int size() { |
| return names.size(); |
| } |
| } |
| } |