1 files changed, 78 insertions, 0 deletions
diff --git a/src/com/android/contacts/common/util/ContactLoaderUtils.java b/src/com/android/contacts/common/util/ContactLoaderUtils.java
new file mode 100644
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--- /dev/null
+++ b/src/com/android/contacts/common/util/ContactLoaderUtils.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2011 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.contacts.common.util;
+
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.net.Uri;
+import android.provider.Contacts;
+import android.provider.ContactsContract;
+import android.provider.ContactsContract.RawContacts;
+
+/**
+ * Utility methods for the {@link ContactLoader}.
+ */
+public final class ContactLoaderUtils {
+
+    /** Static helper, not instantiable. */
+    private ContactLoaderUtils() {}
+
+    /**
+     * Transforms the given Uri and returns a Lookup-Uri that represents the contact.
+     * For legacy contacts, a raw-contact lookup is performed. An {@link IllegalArgumentException}
+     * can be thrown if the URI is null or the authority is not recognized.
+     *
+     * Do not call from the UI thread.
+     */
+    @SuppressWarnings("deprecation")
+    public static Uri ensureIsContactUri(final ContentResolver resolver, final Uri uri)
+            throws IllegalArgumentException {
+        if (uri == null) throw new IllegalArgumentException("uri must not be null");
+
+        final String authority = uri.getAuthority();
+
+        // Current Style Uri?
+        if (ContactsContract.AUTHORITY.equals(authority)) {
+            final String type = resolver.getType(uri);
+            // Contact-Uri? Good, return it
+            if (ContactsContract.Contacts.CONTENT_ITEM_TYPE.equals(type)) {
+                return uri;
+            }
+
+            // RawContact-Uri? Transform it to ContactUri
+            if (RawContacts.CONTENT_ITEM_TYPE.equals(type)) {
+                final long rawContactId = ContentUris.parseId(uri);
+                return RawContacts.getContactLookupUri(resolver,
+                        ContentUris.withAppendedId(RawContacts.CONTENT_URI, rawContactId));
+            }
+
+            // Anything else? We don't know what this is
+            throw new IllegalArgumentException("uri format is unknown");
+        }
+
+        // Legacy Style? Convert to RawContact
+        final String OBSOLETE_AUTHORITY = Contacts.AUTHORITY;
+        if (OBSOLETE_AUTHORITY.equals(authority)) {
+            // Legacy Format. Convert to RawContact-Uri and then lookup the contact
+            final long rawContactId = ContentUris.parseId(uri);
+            return RawContacts.getContactLookupUri(resolver,
+                    ContentUris.withAppendedId(RawContacts.CONTENT_URI, rawContactId));
+        }
+
+        throw new IllegalArgumentException("uri authority is unknown");
+    }
+}