/**
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* muCommander is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.file.archive;
import com.mucommander.commons.file.util.PathUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.swing.tree.DefaultMutableTreeNode;
/**
* Stores archive entries and organizes them in a tree structure that maps entries in the way they are organized
* inside the archive. An instance of <code>ArchiveEntryTree</code> also acts as the root node: all entry nodes
* are children of it (direct or indirect).
*
* @author Maxence Bernard
*/
public class ArchiveEntryTree extends DefaultMutableTreeNode {
private static final Logger LOGGER = LoggerFactory.getLogger(ArchiveEntryTree.class);
/**
* Creates a new empty tree.
*/
public ArchiveEntryTree() {
}
/**
* Adds the given entry to the archive tree, creating parent nodes as necessary.
*
* @param entry the entry to add to the tree
*/
public void addArchiveEntry(ArchiveEntry entry) {
String entryPath = entry.getPath();
int entryDepth = entry.getDepth();
int slashPos = 0;
DefaultMutableTreeNode node = this;
for(int d=1; d<=entryDepth; d++) {
if(d==entryDepth && !entry.isDirectory()) {
// Create a leaf node for the entry
entry.setExists(true); // the entry has to exist
node.add(new DefaultMutableTreeNode(entry, true));
break;
}
String subPath = d==entryDepth?entryPath:entryPath.substring(0, (slashPos=entryPath.indexOf('/', slashPos)+1));
int nbChildren = node.getChildCount();
DefaultMutableTreeNode childNode = null;
boolean matchFound = false;
for(int c=0; c<nbChildren; c++) {
childNode = (DefaultMutableTreeNode)node.getChildAt(c);
// Path comparison is 'trailing slash insensitive'
if(PathUtils.pathEquals(((ArchiveEntry)childNode.getUserObject()).getPath(), subPath, "/")) {
// Found a match
matchFound = true;
break;
}
}
if(matchFound) {
if(d==entryDepth) {
LOGGER.trace("Replacing entry for node "+childNode);
// Replace existing entry
childNode.setUserObject(entry);
}
else {
node = childNode;
}
}
else {
if(d==entryDepth) {
// Create a leaf node for the entry
entry.setExists(true); // the entry has to exist
node.add(new DefaultMutableTreeNode(entry, true));
}
else {
LOGGER.trace("Creating node for "+subPath);
childNode = new DefaultMutableTreeNode(new ArchiveEntry(subPath, true, entry.getDate(), 0, true), true);
node.add(childNode);
node = childNode;
}
}
}
}
/**
* Finds and returns the node that corresponds to the specified entry path, <code>null</code> if no entry matching
* the path could be found.
*
* <p>Important note: the given path's separator character must be '/' and the path must be relative to the
* archive's root, i.e. not start with a leading '/', otherwise the entry will not be found. Trailing separators
* are ignored when paths are compared, for example the path 'temp' will match the entry 'temp/'.
*
* @param entryPath the path to the entry to look up in this tree
* @return the node that corresponds to the specified entry path
*/
public DefaultMutableTreeNode findEntryNode(String entryPath) {
int entryDepth = ArchiveEntry.getDepth(entryPath);
int slashPos = 0;
DefaultMutableTreeNode currentNode = this;
for(int d=1; d<=entryDepth; d++) {
String subPath = d==entryDepth?entryPath:entryPath.substring(0, (slashPos=entryPath.indexOf('/', slashPos)+1));
int nbChildren = currentNode.getChildCount();
DefaultMutableTreeNode matchNode = null;
for(int c=0; c<nbChildren; c++) {
DefaultMutableTreeNode childNode = (DefaultMutableTreeNode)currentNode.getChildAt(c);
// Path comparison is 'trailing slash insensitive'
if(PathUtils.pathEquals(((ArchiveEntry)childNode.getUserObject()).getPath(), subPath, "/")) {
// Found the node, let's return it
matchNode = childNode;
break;
}
}
if(matchNode==null)
return null; // No node maching the provided path, return null
currentNode = matchNode;
}
return currentNode;
}
}