4 files changed, 222 insertions, 0 deletions
diff --git a/core/java/android/content/ComponentName.java b/core/java/android/content/ComponentName.java
index ead6c25989ce..fc5853353ce6 100644
--- a/core/java/android/content/ComponentName.java
+++ b/core/java/android/content/ComponentName.java
@@ -396,4 +396,14 @@ public final class ComponentName implements Parcelable, Cloneable, Comparable<Co
         mPackage = pkg;
         mClass = in.readString();
     }
+
+    /**
+     * Interface for classes associated with a component name.
+     * @hide
+     */
+    @FunctionalInterface
+    public interface WithComponentName {
+        /** Return the associated component name. */
+        ComponentName getComponentName();
+    }
 }
diff --git a/core/java/com/android/internal/util/CollectionUtils.java b/core/java/com/android/internal/util/CollectionUtils.java
index 433d14f7b453..083c0c9736f9 100644
--- a/core/java/com/android/internal/util/CollectionUtils.java
+++ b/core/java/com/android/internal/util/CollectionUtils.java
@@ -29,6 +29,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.function.Function;
+import java.util.function.Predicate;
 import java.util.stream.Stream;
 
 /**
@@ -84,6 +85,17 @@ public class CollectionUtils {
         return emptyIfNull(result);
     }
 
+    /** Add all elements matching {@code predicate} in {@code source} to {@code dest}. */
+    public static <T> void addIf(@Nullable List<T> source, @NonNull Collection<? super T> dest,
+            @Nullable Predicate<? super T> predicate) {
+        for (int i = 0; i < size(source); i++) {
+            final T item = source.get(i);
+            if (predicate.test(item)) {
+                dest.add(item);
+            }
+        }
+    }
+
     /**
      * Returns a list of items resulting from applying the given function to each element of the
      * provided list.
diff --git a/core/java/com/android/internal/util/DumpUtils.java b/core/java/com/android/internal/util/DumpUtils.java
index e85b782facb2..7fd83bc6c8b9 100644
--- a/core/java/com/android/internal/util/DumpUtils.java
+++ b/core/java/com/android/internal/util/DumpUtils.java
@@ -16,18 +16,25 @@
 
 package com.android.internal.util;
 
+import android.annotation.Nullable;
 import android.app.AppOpsManager;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Binder;
 import android.os.Handler;
+import android.text.TextUtils;
 import android.util.Slog;
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.util.Objects;
+import java.util.function.Predicate;
 
 /**
  * Helper functions for dumping the state of system services.
+ * Test:
+ atest /android/pi-dev/frameworks/base/core/tests/coretests/src/com/android/internal/util/DumpUtilsTest.java
  */
 public final class DumpUtils {
     private static final String TAG = "DumpUtils";
@@ -153,4 +160,99 @@ public final class DumpUtils {
             PrintWriter pw) {
         return checkDumpPermission(context, tag, pw) && checkUsageStatsPermission(context, tag, pw);
     }
+
+    /**
+     * Return whether a package name is considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isPlatformPackage(@Nullable String packageName) {
+        return (packageName != null)
+                && (packageName.equals("android")
+                    || packageName.startsWith("android.")
+                    || packageName.startsWith("com.android."));
+    }
+
+    /**
+     * Return whether a package name is considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isPlatformPackage(@Nullable ComponentName cname) {
+        return (cname != null) && isPlatformPackage(cname.getPackageName());
+    }
+
+    /**
+     * Return whether a package name is considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isPlatformPackage(@Nullable ComponentName.WithComponentName wcn) {
+        return (wcn != null) && isPlatformPackage(wcn.getComponentName());
+    }
+
+    /**
+     * Return whether a package name is NOT considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isNonPlatformPackage(@Nullable String packageName) {
+        return (packageName != null) && !isPlatformPackage(packageName);
+    }
+
+    /**
+     * Return whether a package name is NOT considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isNonPlatformPackage(@Nullable ComponentName cname) {
+        return (cname != null) && isNonPlatformPackage(cname.getPackageName());
+    }
+
+    /**
+     * Return whether a package name is NOT considered to be part of the platform.
+     * @hide
+     */
+    public static boolean isNonPlatformPackage(@Nullable ComponentName.WithComponentName wcn) {
+        return (wcn != null) && !isPlatformPackage(wcn.getComponentName());
+    }
+
+    /**
+     * Used for dumping providers and services. Return a predicate for a given filter string.
+     * @hide
+     */
+    public static <TRec extends ComponentName.WithComponentName> Predicate<TRec> filterRecord(
+            @Nullable String filterString) {
+
+        if (TextUtils.isEmpty(filterString)) {
+            return rec -> false;
+        }
+
+        // Dump all?
+        if ("all".equals(filterString)) {
+            return Objects::nonNull;
+        }
+
+        // Dump all platform?
+        if ("all-platform".equals(filterString)) {
+            return DumpUtils::isPlatformPackage;
+        }
+
+        // Dump all non-platform?
+        if ("all-non-platform".equals(filterString)) {
+            return DumpUtils::isNonPlatformPackage;
+        }
+
+        // Is the filter a component name? If so, do an exact match.
+        final ComponentName filterCname = ComponentName.unflattenFromString(filterString);
+        if (filterCname != null) {
+            // Do exact component name check.
+            return rec -> (rec != null) && filterCname.equals(rec.getComponentName());
+        }
+
+        // Otherwise, do a partial match against the component name.
+        // Also if the filter is a hex-decimal string, do the object ID match too.
+        final int id = ParseUtils.parseIntWithBase(filterString, 16, -1);
+        return rec -> {
+            final ComponentName cn = rec.getComponentName();
+            return ((id != -1) && (System.identityHashCode(rec) == id))
+                    || cn.flattenToString().toLowerCase().contains(filterString.toLowerCase());
+        };
+    }
 }
+
diff --git a/core/java/com/android/internal/util/ParseUtils.java b/core/java/com/android/internal/util/ParseUtils.java
new file mode 100644
index 000000000000..a591f4aa41fc
--- /dev/null
+++ b/core/java/com/android/internal/util/ParseUtils.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2018 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.internal.util;
+
+import android.annotation.Nullable;
+
+/**
+ * Various numeric -> strings conversion.
+ *
+ * Test:
+ atest /android/pi-dev/frameworks/base/core/tests/coretests/src/com/android/internal/util/ParseUtilsTest.java
+ */
+public final class ParseUtils {
+    private ParseUtils() {
+    }
+
+    /** Parse a value as a base-10 integer. */
+    public static int parseInt(@Nullable String value, int defValue) {
+        return parseIntWithBase(value, 10, defValue);
+    }
+
+    /** Parse a value as an integer of a given base. */
+    public static int parseIntWithBase(@Nullable String value, int base, int defValue) {
+        if (value == null) {
+            return defValue;
+        }
+        try {
+            return Integer.parseInt(value, base);
+        } catch (NumberFormatException e) {
+            return defValue;
+        }
+    }
+
+    /** Parse a value as a base-10 long. */
+    public static long parseLong(@Nullable String value, long defValue) {
+        return parseLongWithBase(value, 10, defValue);
+    }
+
+    /** Parse a value as a long of a given base. */
+    public static long parseLongWithBase(@Nullable String value, int base, long defValue) {
+        if (value == null) {
+            return defValue;
+        }
+        try {
+            return Long.parseLong(value, base);
+        } catch (NumberFormatException e) {
+            return defValue;
+        }
+    }
+
+    /** Parse a value as a float. */
+    public static float parseFloat(@Nullable String value, float defValue) {
+        if (value == null) {
+            return defValue;
+        }
+        try {
+            return Float.parseFloat(value);
+        } catch (NumberFormatException e) {
+            return defValue;
+        }
+    }
+
+    /** Parse a value as a double. */
+    public static double parseDouble(@Nullable String value, double defValue) {
+        if (value == null) {
+            return defValue;
+        }
+        try {
+            return Double.parseDouble(value);
+        } catch (NumberFormatException e) {
+            return defValue;
+        }
+    }
+
+    /** Parse a value as a boolean. */
+    public static boolean parseBoolean(@Nullable String value, boolean defValue) {
+        if ("true".equals(value)) {
+            return true;
+        }
+        if ("false".equals(value)) {
+            return false;
+        }
+        return parseInt(value, defValue ? 1 : 0) != 0;
+    }
+}