Android example source code file (FsUtils.java)

This example Android source code file (FsUtils.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, bufferedoutputstream, bufferedreader, error, external_dir, failed, file, filereader, filewriter, fsutils, io, ioexception, logtag, os, recursing, regex, string, stringbuffer, util, utilities

The FsUtils.java Android example source code

/*
 * Copyright (C) 2009 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.dumprendertree;

import com.android.dumprendertree.forwarder.ForwardService;

import android.os.Environment;
import android.util.Log;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Pattern;

public class FsUtils {

    private static final String LOGTAG = "FsUtils";
    static final String EXTERNAL_DIR = Environment.getExternalStorageDirectory().toString();
    static final String HTTP_TESTS_PREFIX =
        EXTERNAL_DIR + "/android/layout_tests/http/tests/";
    static final String HTTPS_TESTS_PREFIX =
        EXTERNAL_DIR + "/android/layout_tests/http/tests/ssl/";
    static final String HTTP_LOCAL_TESTS_PREFIX =
        EXTERNAL_DIR + "/android/layout_tests/http/tests/local/";
    static final String HTTP_MEDIA_TESTS_PREFIX =
        EXTERNAL_DIR + "/android/layout_tests/http/tests/media/";
    static final String HTTP_WML_TESTS_PREFIX =
        EXTERNAL_DIR + "/android/layout_tests/http/tests/wml/";

    private FsUtils() {
        //no creation of instances
    }

    public static void findLayoutTestsRecursively(BufferedOutputStream bos,
            String dir, boolean ignoreResultsInDir) throws IOException {
        Log.v(LOGTAG, "Searching tests under " + dir);

        File d = new File(dir);
        if (!d.isDirectory()) {
            throw new AssertionError("A directory expected, but got " + dir);
        }
        ignoreResultsInDir |= FileFilter.ignoreResult(dir);

        String[] files = d.list();
        for (int i = 0; i < files.length; i++) {
            String s = dir + "/" + files[i];

            File f = new File(s);
            if (f.isDirectory()) {
                // If this is not a test directory, we don't recurse into it.
                if (!FileFilter.isNonTestDir(s)) {
                    Log.v(LOGTAG, "Recursing on " + s);
                    findLayoutTestsRecursively(bos, s, ignoreResultsInDir);
                }
                continue;
            }

            // If this test should be ignored, we skip it completely.
            if (FileFilter.ignoreTest(s)) {
                Log.v(LOGTAG, "Ignoring: " + s);
                continue;
            }

            if ((s.toLowerCase().endsWith(".html") || s.toLowerCase().endsWith(".xml"))
                    && !s.endsWith("TEMPLATE.html")) {
                Log.v(LOGTAG, "Recording " + s);
                bos.write(s.getBytes());
                // If the result of this test should be ignored, we still run the test.
                if (ignoreResultsInDir || FileFilter.ignoreResult(s)) {
                    bos.write((" IGNORE_RESULT").getBytes());
                }
                bos.write('\n');
            }
        }
    }

    public static void updateTestStatus(String statusFile, String s) {
        try {
            BufferedOutputStream bos = new BufferedOutputStream(
                    new FileOutputStream(statusFile));
            bos.write(s.getBytes());
            bos.close();
        } catch (Exception e) {
            Log.e(LOGTAG, "Cannot update file " + statusFile);
        }
    }

    public static String readTestStatus(String statusFile) {
        // read out the test name it stopped last time.
        String status = null;
        File testStatusFile = new File(statusFile);
        if(testStatusFile.exists()) {
            try {
                BufferedReader inReader = new BufferedReader(
                        new FileReader(testStatusFile));
                status = inReader.readLine();
                inReader.close();
            } catch (IOException e) {
                Log.e(LOGTAG, "Error reading test status.", e);
            }
        }
        return status;
    }

    public static String getTestUrl(String path) {
        String url = null;
        if (!path.startsWith(HTTP_TESTS_PREFIX)) {
            url = "file://" + path;
        } else {
            ForwardService.getForwardService().startForwardService();
            if (path.startsWith(HTTPS_TESTS_PREFIX)) {
                // still cut the URL after "http/tests/"
                url = "https://127.0.0.1:8443/" + path.substring(HTTP_TESTS_PREFIX.length());
            } else if (!path.startsWith(HTTP_LOCAL_TESTS_PREFIX)
                    && !path.startsWith(HTTP_MEDIA_TESTS_PREFIX)
                    && !path.startsWith(HTTP_WML_TESTS_PREFIX)) {
                url = "http://127.0.0.1:8000/" + path.substring(HTTP_TESTS_PREFIX.length());
            } else {
                url = "file://" + path;
            }
        }
        return url;
    }

    public static boolean diffIgnoreSpaces(String file1, String file2)  throws IOException {
        BufferedReader br1 = new BufferedReader(new FileReader(file1));
        BufferedReader br2 = new BufferedReader(new FileReader(file2));
        boolean same = true;
        Pattern trailingSpace = Pattern.compile("\\s+$");

        while(true) {
            String line1 = br1.readLine();
            String line2 = br2.readLine();

            if (line1 == null && line2 == null)
                break;
            if (line1 != null) {
                line1 = trailingSpace.matcher(line1).replaceAll("");
            } else {
                line1 = "";
            }
            if (line2 != null) {
                line2 = trailingSpace.matcher(line2).replaceAll("");
            } else {
                line2 = "";
            }
            if(!line1.equals(line2)) {
                same = false;
                break;
            }
        }

        br1.close();
        br2.close();

        return same;
    }

    public static boolean isTestPageUrl(String url) {
        int qmPostion = url.indexOf('?');
        int slashPostion = url.lastIndexOf('/');
        if (slashPostion < qmPostion) {
            String fileName = url.substring(slashPostion + 1, qmPostion);
            if ("index.html".equals(fileName)) {
                return true;
            }
        }
        return false;
    }

    public static String getLastSegmentInPath(String path) {
        int endPos = path.lastIndexOf('/');
        path = path.substring(0, endPos);
        endPos = path.lastIndexOf('/');
        return path.substring(endPos + 1);
    }

    public static void writeDrawTime(String fileName, String url, long[] times) {
        StringBuffer lineBuffer = new StringBuffer();
        // grab the last segment of path in url
        lineBuffer.append(getLastSegmentInPath(url));
        for (long time : times) {
            lineBuffer.append('\t');
            lineBuffer.append(time);
        }
        lineBuffer.append('\n');
        String line = lineBuffer.toString();
        Log.v(LOGTAG, "logging draw times: " + line);
        try {
            FileWriter fw = new FileWriter(fileName, true);
            fw.write(line);
            fw.close();
        } catch (IOException ioe) {
            Log.e(LOGTAG, "Failed to log draw times", ioe);
        }
    }

}