implement ContentResolver

ContentUris.java and UriMatcher.java are copied from AOSP

src/api-impl/android/content/ContentProvider.java

@@ -1,8 +1,15 @@
 package android.content;
 
-import android.content.pm.PackageParser;
+import java.util.HashMap;
+import java.util.Map;
 
-public class ContentProvider {
+import android.content.pm.PackageParser;
+import android.database.Cursor;
+import android.net.Uri;
+
+public abstract class ContentProvider {
+
+	static Map<String, ContentProvider> providers = new HashMap<String, ContentProvider>();
 
 	static void createContentProviders() throws Exception {
 		for (PackageParser.Provider provider_parsed : Context.pkg.providers) {
@@ -11,6 +18,7 @@ public class ContentProvider {
 			Class<? extends ContentProvider> providerCls = Class.forName(providerName).asSubclass(ContentProvider.class);
 			ContentProvider provider = providerCls.getConstructor().newInstance();
 			provider.onCreate();
+			providers.put(provider_parsed.info.authority, provider);
 		}
 	}
 
@@ -20,4 +28,10 @@ public class ContentProvider {
 		return new Context();
 	}
 
+	public abstract Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder);
+
+	public abstract Uri insert(Uri uri, ContentValues values);
+
+	public abstract int delete(Uri uri, String selection, String[] selectionArgs);
+
 }

src/api-impl/android/content/ContentResolver.java

@@ -3,7 +3,6 @@ package android.content;
 import java.io.File;
 import java.io.FileNotFoundException;
 
-import android.database.AbstractCursor;
 import android.database.ContentObserver;
 import android.database.Cursor;
 import android.net.Uri;
@@ -28,17 +27,11 @@ public class ContentResolver {
 	}
 
 	public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
-		return new AbstractCursor() {
-			public int getCount() { return 0; }
-			public String[] getColumnNames() { return new String[0]; }
-			public String getString(int column) { throw new IndexOutOfBoundsException(); }
-			public short getShort(int column) { throw new IndexOutOfBoundsException(); }
-			public int getInt(int column) { throw new IndexOutOfBoundsException(); }
-			public long getLong(int column) { throw new IndexOutOfBoundsException(); }
-			public float getFloat(int column) { throw new IndexOutOfBoundsException(); }
-			public double getDouble(int column) { throw new IndexOutOfBoundsException(); }
-			public boolean isNull(int column) { throw new IndexOutOfBoundsException(); }
-		};
+		ContentProvider provider = ContentProvider.providers.get(uri.getAuthority());
+		if (provider != null)
+			return provider.query(uri, projection, selection, selectionArgs, sortOrder);
+		else
+			return null;
 	}
 
 	public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder, CancellationSignal cancellationSignal) {
@@ -46,6 +39,18 @@ public class ContentResolver {
 	}
 
 	public int delete(Uri uri, String selection, String[] selectionArgs) {
+		ContentProvider provider = ContentProvider.providers.get(uri.getAuthority());
+		if (provider != null)
+			return provider.delete(uri, selection, selectionArgs);
+		else
 			return 0;
 	}
+
+	public Uri insert(Uri uri, ContentValues values) {
+		ContentProvider provider = ContentProvider.providers.get(uri.getAuthority());
+		if (provider != null)
+			return provider.insert(uri, values);
+		else
+			return null;
+	}
 }

src/api-impl/android/content/ContentUris.java

@@ -0,0 +1,140 @@
+/*
+ * 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 java.util.List;
+
+import android.net.Uri;
+
+/**
+* Utility methods useful for working with {@link android.net.Uri} objects
+* that use the "content" (content://) scheme.
+*
+*<p>
+*   Content URIs have the syntax
+*</p>
+*<p>
+*   <code>content://<em>authority</em>/<em>path</em>/<em>id</em></code>
+*</p>
+*<dl>
+*   <dt>
+*       <code>content:</code>
+*   </dt>
+*   <dd>
+*       The scheme portion of the URI. This is always set to {@link
+*       android.content.ContentResolver#SCHEME_CONTENT ContentResolver.SCHEME_CONTENT} (value
+*       <code>content://</code>).
+*   </dd>
+*   <dt>
+*       <em>authority</em>
+*   </dt>
+*   <dd>
+*       A string that identifies the entire content provider. All the content URIs for the provider
+*       start with this string. To guarantee a unique authority, providers should consider
+*       using an authority that is the same as the provider class' package identifier.
+*   </dd>
+*   <dt>
+*       <em>path</em>
+*   </dt>
+*   <dd>
+*       Zero or more segments, separated by a forward slash (<code>/</code>), that identify
+*       some subset of the provider's data. Most providers use the path part to identify
+*       individual tables. Individual segments in the path are often called
+*       &quot;directories&quot; although they do not refer to file directories. The right-most
+*       segment in a path is often called a &quot;twig&quot;
+*   </dd>
+*   <dt>
+*       <em>id</em>
+*   </dt>
+*   <dd>
+*       A unique numeric identifier for a single row in the subset of data identified by the
+*       preceding path part. Most providers recognize content URIs that contain an id part
+*       and give them special handling. A table that contains a column named <code>_ID</code>
+*       often expects the id part to be a particular value for that column.
+*   </dd>
+*</dl>
+*
+*/
+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();
+	}
+
+	/**
+	 * Removes any ID from the end of the path.
+	 *
+	 * @param contentUri that ends with an ID
+	 * @return a new URI with the ID removed from the end of the path
+	 * @throws IllegalArgumentException when the given URI has no ID to remove
+	 *             from the end of the path
+	 */
+	public static Uri removeId(Uri contentUri) {
+		// Verify that we have a valid ID to actually remove
+		final String last = contentUri.getLastPathSegment();
+		if (last == null) {
+			throw new IllegalArgumentException("No path segments to remove");
+		} else {
+			Long.parseLong(last);
+		}
+
+		final List<String> segments = contentUri.getPathSegments();
+		final Uri.Builder builder = contentUri.buildUpon();
+		builder.path(null);
+		for (int i = 0; i < segments.size() - 1; i++) {
+			builder.appendPath(segments.get(i));
+		}
+		return builder.build();
+	}
+}

src/api-impl/android/content/SearchRecentSuggestionsProvider.java

@@ -1,5 +1,23 @@
 package android.content;
 
+import android.database.Cursor;
+import android.net.Uri;
+
 public class SearchRecentSuggestionsProvider extends ContentProvider {
 	public void setupSuggestions(String s, int i) {}
+
+	@Override
+	public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
+		throw new UnsupportedOperationException("Unimplemented method 'query'");
+	}
+
+	@Override
+	public Uri insert(Uri uri, ContentValues values) {
+		throw new UnsupportedOperationException("Unimplemented method 'insert'");
+	}
+
+	@Override
+	public int delete(Uri uri, String selection, String[] selectionArgs) {
+		throw new UnsupportedOperationException("Unimplemented method 'delete'");
+	}
 }

src/api-impl/android/content/UriMatcher.java

@@ -1,8 +1,282 @@
+/*
+ * Copyright (C) 2006 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;
 
-public class UriMatcher {
+import java.util.ArrayList;
+import java.util.List;
 
-	public UriMatcher(int code) {}
+import android.net.Uri;
 
-	public void addURI(String authority, String path, int code) {}
+/**
+Utility class to aid in matching URIs in content providers.
+
+<p>To use this class, build up a tree of <code>UriMatcher</code> objects.
+For example:
+<pre>
+	private static final int PEOPLE = 1;
+	private static final int PEOPLE_ID = 2;
+	private static final int PEOPLE_PHONES = 3;
+	private static final int PEOPLE_PHONES_ID = 4;
+	private static final int PEOPLE_CONTACTMETHODS = 7;
+	private static final int PEOPLE_CONTACTMETHODS_ID = 8;
+
+	private static final int DELETED_PEOPLE = 20;
+
+	private static final int PHONES = 9;
+	private static final int PHONES_ID = 10;
+	private static final int PHONES_FILTER = 14;
+
+	private static final int CONTACTMETHODS = 18;
+	private static final int CONTACTMETHODS_ID = 19;
+
+	private static final int CALLS = 11;
+	private static final int CALLS_ID = 12;
+	private static final int CALLS_FILTER = 15;
+
+	private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+
+	static
+	{
+		sURIMatcher.addURI("contacts", "people", PEOPLE);
+		sURIMatcher.addURI("contacts", "people/#", PEOPLE_ID);
+		sURIMatcher.addURI("contacts", "people/#/phones", PEOPLE_PHONES);
+		sURIMatcher.addURI("contacts", "people/#/phones/#", PEOPLE_PHONES_ID);
+		sURIMatcher.addURI("contacts", "people/#/contact_methods", PEOPLE_CONTACTMETHODS);
+		sURIMatcher.addURI("contacts", "people/#/contact_methods/#", PEOPLE_CONTACTMETHODS_ID);
+		sURIMatcher.addURI("contacts", "deleted_people", DELETED_PEOPLE);
+		sURIMatcher.addURI("contacts", "phones", PHONES);
+		sURIMatcher.addURI("contacts", "phones/filter/*", PHONES_FILTER);
+		sURIMatcher.addURI("contacts", "phones/#", PHONES_ID);
+		sURIMatcher.addURI("contacts", "contact_methods", CONTACTMETHODS);
+		sURIMatcher.addURI("contacts", "contact_methods/#", CONTACTMETHODS_ID);
+		sURIMatcher.addURI("call_log", "calls", CALLS);
+		sURIMatcher.addURI("call_log", "calls/filter/*", CALLS_FILTER);
+		sURIMatcher.addURI("call_log", "calls/#", CALLS_ID);
+	}
+</pre>
+<p>Starting from API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, paths can start
+ with a leading slash.  For example:
+<pre>
+		sURIMatcher.addURI("contacts", "/people", PEOPLE);
+</pre>
+<p>Then when you need to match against a URI, call {@link #match}, providing
+the URL that you have been given.  You can use the result to build a query,
+return a type, insert or delete a row, or whatever you need, without duplicating
+all of the if-else logic that you would otherwise need.  For example:
+<pre>
+	public String getType(Uri url)
+	{
+		int match = sURIMatcher.match(url);
+		switch (match)
+		{
+			case PEOPLE:
+				return "vnd.android.cursor.dir/person";
+			case PEOPLE_ID:
+				return "vnd.android.cursor.item/person";
+... snip ...
+				return "vnd.android.cursor.dir/snail-mail";
+			case PEOPLE_ADDRESS_ID:
+				return "vnd.android.cursor.item/snail-mail";
+			default:
+				return null;
+		}
+	}
+</pre>
+instead of:
+<pre>
+	public String getType(Uri url)
+	{
+		List<String> pathSegments = url.getPathSegments();
+		if (pathSegments.size() >= 2) {
+			if ("people".equals(pathSegments.get(1))) {
+				if (pathSegments.size() == 2) {
+					return "vnd.android.cursor.dir/person";
+				} else if (pathSegments.size() == 3) {
+					return "vnd.android.cursor.item/person";
+... snip ...
+					return "vnd.android.cursor.dir/snail-mail";
+				} else if (pathSegments.size() == 3) {
+					return "vnd.android.cursor.item/snail-mail";
+				}
+			}
+		}
+		return null;
+	}
+</pre>
+*/
+public class UriMatcher
+{
+	public static final int NO_MATCH = -1;
+	/**
+	 * Creates the root node of the URI tree.
+	 *
+	 * @param code the code to match for the root URI
+	 */
+	public UriMatcher(int code)
+	{
+		mCode = code;
+		mWhich = -1;
+		mChildren = new ArrayList<UriMatcher>();
+		mText = null;
+	}
+
+	private UriMatcher(int which, String text)
+	{
+		mCode = NO_MATCH;
+		mWhich = which;
+		mChildren = new ArrayList<UriMatcher>();
+		mText = text;
+	}
+
+	/**
+	 * Add a URI to match, and the code to return when this URI is
+	 * matched. URI nodes may be exact match string, the token "*"
+	 * that matches any text, or the token "#" that matches only
+	 * numbers.
+	 * <p>
+	 * Starting from API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+	 * this method will accept a leading slash in the path.
+	 *
+	 * @param authority the authority to match
+	 * @param path the path to match. * may be used as a wild card for
+	 * any text, and # may be used as a wild card for numbers.
+	 * @param code the code that is returned when a URI is matched
+	 * against the given components. Must be positive.
+	 */
+	public void addURI(String authority, String path, int code)
+	{
+		if (code < 0) {
+			throw new IllegalArgumentException("code " + code + " is invalid: it must be positive");
+		}
+
+		String[] tokens = null;
+		if (path != null) {
+			String newPath = path;
+			// Strip leading slash if present.
+			if (path.length() > 1 && path.charAt(0) == '/') {
+				newPath = path.substring(1);
+			}
+			tokens = newPath.split("/");
+		}
+
+		int numTokens = tokens != null ? tokens.length : 0;
+		UriMatcher node = this;
+		for (int i = -1; i < numTokens; i++) {
+			String token = i < 0 ? authority : tokens[i];
+			ArrayList<UriMatcher> children = node.mChildren;
+			int numChildren = children.size();
+			UriMatcher child;
+			int j;
+			for (j = 0; j < numChildren; j++) {
+				child = children.get(j);
+				if (token.equals(child.mText)) {
+					node = child;
+					break;
+				}
+			}
+			if (j == numChildren) {
+				// Child not found, create it
+				child = createChild(token);
+				node.mChildren.add(child);
+				node = child;
+			}
+		}
+		node.mCode = code;
+	}
+
+	private static UriMatcher createChild(String token) {
+		switch (token) {
+			case "#":
+				return new UriMatcher(NUMBER, "#");
+			case "*":
+				return new UriMatcher(TEXT, "*");
+			default:
+				return new UriMatcher(EXACT, token);
+		}
+	}
+
+	/**
+	 * Try to match against the path in a url.
+	 *
+	 * @param uri       The url whose path we will match against.
+	 *
+	 * @return  The code for the matched node (added using addURI),
+	 * or -1 if there is no matched node.
+	 */
+	public int match(Uri uri)
+	{
+		final List<String> pathSegments = uri.getPathSegments();
+		final int li = pathSegments.size();
+
+		UriMatcher node = this;
+
+		if (li == 0 && uri.getAuthority() == null) {
+			return this.mCode;
+		}
+
+		for (int i=-1; i<li; i++) {
+			String u = i < 0 ? uri.getAuthority() : pathSegments.get(i);
+			ArrayList<UriMatcher> list = node.mChildren;
+			if (list == null) {
+				break;
+			}
+			node = null;
+			int lj = list.size();
+			for (int j=0; j<lj; j++) {
+				UriMatcher n = list.get(j);
+		  which_switch:
+				switch (n.mWhich) {
+					case EXACT:
+						if (n.mText.equals(u)) {
+							node = n;
+						}
+						break;
+					case NUMBER:
+						int lk = u.length();
+						for (int k=0; k<lk; k++) {
+							char c = u.charAt(k);
+							if (c < '0' || c > '9') {
+								break which_switch;
+							}
+						}
+						node = n;
+						break;
+					case TEXT:
+						node = n;
+						break;
+				}
+				if (node != null) {
+					break;
+				}
+			}
+			if (node == null) {
+				return NO_MATCH;
+			}
+		}
+
+		return node.mCode;
+	}
+
+	private static final int EXACT = 0;
+	private static final int NUMBER = 1;
+	private static final int TEXT = 2;
+
+	private int mCode;
+	private final int mWhich;
+	private final String mText;
+	private ArrayList<UriMatcher> mChildren;
 }

src/api-impl/meson.build

@@ -65,6 +65,7 @@ hax_jar = jar('hax', [
               	'android/content/ComponentName.java',
               	'android/content/ContentProvider.java',
               	'android/content/ContentResolver.java',
+              	'android/content/ContentUris.java',
               	'android/content/ContentValues.java',
               	'android/content/Context.java',
               	'android/content/ContextWrapper.java',