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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.data;
import java.util.ArrayList;
import java.util.HashMap;
public class PathMatcher {
public static final int NOT_FOUND = -1;
private ArrayList<String> mVariables = new ArrayList<String>();
private Node mRoot = new Node();
public PathMatcher() {
mRoot = new Node();
}
public void add(String pattern, int kind) {
String[] segments = Path.split(pattern);
Node current = mRoot;
for (int i = 0; i < segments.length; i++) {
current = current.addChild(segments[i]);
}
current.setKind(kind);
}
public int match(Path path) {
String[] segments = path.split();
mVariables.clear();
Node current = mRoot;
for (int i = 0; i < segments.length; i++) {
Node next = current.getChild(segments[i]);
if (next == null) {
next = current.getChild("*");
if (next != null) {
mVariables.add(segments[i]);
} else {
return NOT_FOUND;
}
}
current = next;
}
return current.getKind();
}
public String getVar(int index) {
return mVariables.get(index);
}
public int getIntVar(int index) {
return Integer.parseInt(mVariables.get(index));
}
public long getLongVar(int index) {
return Long.parseLong(mVariables.get(index));
}
private static class Node {
private HashMap<String, Node> mMap;
private int mKind = NOT_FOUND;
Node addChild(String segment) {
if (mMap == null) {
mMap = new HashMap<String, Node>();
} else {
Node node = mMap.get(segment);
if (node != null) return node;
}
Node n = new Node();
mMap.put(segment, n);
return n;
}
Node getChild(String segment) {
if (mMap == null) return null;
return mMap.get(segment);
}
void setKind(int kind) {
mKind = kind;
}
int getKind() {
return mKind;
}
}
}
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