diff options
author | Eric Erfanian <erfanian@google.com> | 2017-05-16 00:09:31 +0000 |
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committer | android-build-merger <android-build-merger@google.com> | 2017-05-16 00:09:31 +0000 |
commit | c57430a61eab62e88372f386c75989dab6332608 (patch) | |
tree | b606f1899f80fcd0ea3ee753ce799883d5a673ab /java/com/android/dialer/about/Licenses.java | |
parent | 9842b4a7fd1d852b1353af806da4913b4298d516 (diff) | |
parent | 0c9dbf507b53a12bdf577ff3e55c1686a2e089de (diff) |
Merge "Update Dialer to v10 RC32" into oc-dev
am: 0c9dbf507b
Change-Id: I5f90090090c6e430d83fcdd294082c1f5237ade8
Diffstat (limited to 'java/com/android/dialer/about/Licenses.java')
-rw-r--r-- | java/com/android/dialer/about/Licenses.java | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/java/com/android/dialer/about/Licenses.java b/java/com/android/dialer/about/Licenses.java new file mode 100644 index 000000000..d90c282b6 --- /dev/null +++ b/java/com/android/dialer/about/Licenses.java @@ -0,0 +1,106 @@ +/* + * Copyright (C) 2017 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.dialer.about; + +import android.content.Context; +import android.content.res.Resources; +import com.android.dialer.common.Assert; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.UnsupportedEncodingException; +import java.util.ArrayList; +import java.util.Collections; + +/** A helper for extracting licenses. */ +public final class Licenses { + private static final String TAG = "Licenses"; + private static final String LICENSE_FILENAME = "third_party_licenses"; + private static final String LICENSE_METADATA_FILENAME = "third_party_license_metadata"; + + /** Return the licenses bundled into this app. */ + public static ArrayList<License> getLicenses(Context context) { + return getLicenseListFromMetadata( + getTextFromResource(context.getApplicationContext(), LICENSE_METADATA_FILENAME, 0, -1)); + } + + /** + * Returns a list of {@link License}s parsed from a license metadata file. + * + * @param metadata a {@code String} containing the contents of a license metadata file. + */ + private static ArrayList<License> getLicenseListFromMetadata(String metadata) { + String[] entries = metadata.split("\n"); + ArrayList<License> licenses = new ArrayList<License>(entries.length); + for (String entry : entries) { + int delimiter = entry.indexOf(' '); + String[] licenseLocation = entry.substring(0, delimiter).split(":"); + Assert.checkState( + delimiter > 0 && licenseLocation.length == 2, + "Invalid license meta-data line:\n" + entry); + long licenseOffset = Long.parseLong(licenseLocation[0]); + int licenseLength = Integer.parseInt(licenseLocation[1]); + licenses.add(License.create(entry.substring(delimiter + 1), licenseOffset, licenseLength)); + } + Collections.sort(licenses); + return licenses; + } + + /** Return the text of a bundled license file. */ + public static String getLicenseText(Context context, License license) { + long offset = license.getLicenseOffset(); + int length = license.getLicenseLength(); + return getTextFromResource(context, LICENSE_FILENAME, offset, length); + } + + private static String getTextFromResource( + Context context, String filename, long offset, int length) { + Resources resources = context.getApplicationContext().getResources(); + // When aapt is called with --rename-manifest-package, the package name is changed for the + // application, but not for the resources. This is to find the package name of a known + // resource to know what package to lookup the license files in. + String packageName = resources.getResourcePackageName(R.id.dummy_placeholder); + InputStream stream = + resources.openRawResource(resources.getIdentifier(filename, "raw", packageName)); + return getTextFromInputStream(stream, offset, length); + } + + private static String getTextFromInputStream(InputStream stream, long offset, int length) { + byte[] buffer = new byte[1024]; + ByteArrayOutputStream textArray = new ByteArrayOutputStream(); + + try { + stream.skip(offset); + int bytesRemaining = length > 0 ? length : Integer.MAX_VALUE; + int bytes = 0; + + while (bytesRemaining > 0 + && (bytes = stream.read(buffer, 0, Math.min(bytesRemaining, buffer.length))) != -1) { + textArray.write(buffer, 0, bytes); + bytesRemaining -= bytes; + } + stream.close(); + } catch (IOException e) { + throw new RuntimeException("Failed to read license or metadata text.", e); + } + try { + return textArray.toString("UTF-8"); + } catch (UnsupportedEncodingException e) { + throw new RuntimeException("Unsupported encoding UTF8. This should always be supported.", e); + } + } +} |