Java tutorial
/* * SK's Minecraft Launcher * Copyright (C) 2010-2014 Albert Pham <http://www.sk89q.com> and contributors * Please see LICENSE.txt for license information. */ package com.skcraft.launcher.install; import com.fasterxml.jackson.annotation.JsonIgnore; import lombok.Data; import lombok.NonNull; import java.io.File; import java.net.URI; import java.util.HashMap; import java.util.HashSet; import java.util.Map; import java.util.Set; import static com.google.common.base.Preconditions.checkNotNull; @Data public class InstallLog { @JsonIgnore private File baseDir; private Map<String, Set<String>> entries = new HashMap<String, Set<String>>(); @JsonIgnore private Set<String> cache = new HashSet<String>(); public synchronized void add(@NonNull String group, @NonNull String entry) { cache.add(entry); Set<String> subEntries = entries.get(group); if (subEntries == null) { subEntries = new HashSet<String>(); entries.put(group, subEntries); } subEntries.add(entry); } public synchronized void add(@NonNull File group, @NonNull File entry) { add(relativize(group), relativize(entry)); } public synchronized boolean has(@NonNull String entry) { return cache.contains(entry); } public synchronized boolean has(@NonNull File entry) { return has(relativize(entry)); } public synchronized boolean copyGroupFrom(InstallLog other, String group) { Set<String> otherSet = other.entries.get(group); if (otherSet == null) { return false; } for (String entry : otherSet) { add(group, entry); } return true; } public synchronized boolean copyGroupFrom(@NonNull InstallLog other, @NonNull File entry) { return copyGroupFrom(other, relativize(entry)); } @JsonIgnore public synchronized Set<Map.Entry<String, Set<String>>> getEntrySet() { return entries.entrySet(); } public synchronized boolean hasGroup(String group) { return entries.containsKey(group); } private String relativize(File child) { checkNotNull(baseDir); URI uri = child.toURI(); String relative = baseDir.toURI().relativize(uri).getPath(); if (relative.equals(uri.toString())) { throw new IllegalArgumentException("Child path not in base"); } return relative; } }