Initial Contribution

1 files changed, 67 insertions, 0 deletions

diff --git a/core/java/android/content/ContentUris.java b/core/java/android/content/ContentUris.java
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+++ b/core/java/android/content/ContentUris.java
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+/*
+ * Copyright (C) 2007 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 android.content;
+
+import android.net.Uri;
+
+/**
+ * Utility methods useful for working with content {@link android.net.Uri}s,
+ * those with a "content" scheme.
+ */
+public class ContentUris {
+
+    /**
+     * Converts the last path segment to a long.
+     *
+     * <p>This supports a common convention for content URIs where an ID is
+     * stored in the last segment.
+     *
+     * @throws UnsupportedOperationException if this isn't a hierarchical URI
+     * @throws NumberFormatException if the last segment isn't a number
+     *
+     * @return the long conversion of the last segment or -1 if the path is
+     *  empty
+     */
+    public static long parseId(Uri contentUri) {
+        String last = contentUri.getLastPathSegment();
+        return last == null ? -1 : Long.parseLong(last);
+    }
+
+    /**
+     * Appends the given ID to the end of the path.
+     *
+     * @param builder to append the ID to
+     * @param id to append
+     *
+     * @return the given builder
+     */
+    public static Uri.Builder appendId(Uri.Builder builder, long id) {
+        return builder.appendEncodedPath(String.valueOf(id));
+    }
+
+    /**
+     * Appends the given ID to the end of the path.
+     *
+     * @param contentUri to start with
+     * @param id to append
+     *
+     * @return a new URI with the given ID appended to the end of the path
+     */
+    public static Uri withAppendedId(Uri contentUri, long id) {
+        return appendId(contentUri.buildUpon(), id).build();
+    }
+}