diff options
Diffstat (limited to 'services/core/java/com/android/server/IntentResolver.java')
| -rw-r--r-- | services/core/java/com/android/server/IntentResolver.java | 660 |
1 files changed, 660 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/IntentResolver.java b/services/core/java/com/android/server/IntentResolver.java new file mode 100644 index 0000000..64b0487 --- /dev/null +++ b/services/core/java/com/android/server/IntentResolver.java @@ -0,0 +1,660 @@ +/* + * 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 com.android.server; + +import java.io.PrintWriter; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.Comparator; +import java.util.HashSet; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import android.net.Uri; +import android.util.FastImmutableArraySet; +import android.util.ArrayMap; +import android.util.Log; +import android.util.PrintWriterPrinter; +import android.util.Slog; +import android.util.LogPrinter; +import android.util.Printer; + +import android.content.Intent; +import android.content.IntentFilter; +import com.android.internal.util.FastPrintWriter; + +/** + * {@hide} + */ +public abstract class IntentResolver<F extends IntentFilter, R extends Object> { + final private static String TAG = "IntentResolver"; + final private static boolean DEBUG = false; + final private static boolean localLOGV = DEBUG || false; + + public void addFilter(F f) { + if (localLOGV) { + Slog.v(TAG, "Adding filter: " + f); + f.dump(new LogPrinter(Log.VERBOSE, TAG, Log.LOG_ID_SYSTEM), " "); + Slog.v(TAG, " Building Lookup Maps:"); + } + + mFilters.add(f); + int numS = register_intent_filter(f, f.schemesIterator(), + mSchemeToFilter, " Scheme: "); + int numT = register_mime_types(f, " Type: "); + if (numS == 0 && numT == 0) { + register_intent_filter(f, f.actionsIterator(), + mActionToFilter, " Action: "); + } + if (numT != 0) { + register_intent_filter(f, f.actionsIterator(), + mTypedActionToFilter, " TypedAction: "); + } + } + + public void removeFilter(F f) { + removeFilterInternal(f); + mFilters.remove(f); + } + + void removeFilterInternal(F f) { + if (localLOGV) { + Slog.v(TAG, "Removing filter: " + f); + f.dump(new LogPrinter(Log.VERBOSE, TAG, Log.LOG_ID_SYSTEM), " "); + Slog.v(TAG, " Cleaning Lookup Maps:"); + } + + int numS = unregister_intent_filter(f, f.schemesIterator(), + mSchemeToFilter, " Scheme: "); + int numT = unregister_mime_types(f, " Type: "); + if (numS == 0 && numT == 0) { + unregister_intent_filter(f, f.actionsIterator(), + mActionToFilter, " Action: "); + } + if (numT != 0) { + unregister_intent_filter(f, f.actionsIterator(), + mTypedActionToFilter, " TypedAction: "); + } + } + + boolean dumpMap(PrintWriter out, String titlePrefix, String title, + String prefix, Map<String, F[]> map, String packageName, + boolean printFilter) { + String eprefix = prefix + " "; + String fprefix = prefix + " "; + boolean printedSomething = false; + Printer printer = null; + for (Map.Entry<String, F[]> e : map.entrySet()) { + F[] a = e.getValue(); + final int N = a.length; + boolean printedHeader = false; + F filter; + for (int i=0; i<N && (filter=a[i]) != null; i++) { + if (packageName != null && !isPackageForFilter(packageName, filter)) { + continue; + } + if (title != null) { + out.print(titlePrefix); out.println(title); + title = null; + } + if (!printedHeader) { + out.print(eprefix); out.print(e.getKey()); out.println(":"); + printedHeader = true; + } + printedSomething = true; + dumpFilter(out, fprefix, filter); + if (printFilter) { + if (printer == null) { + printer = new PrintWriterPrinter(out); + } + filter.dump(printer, fprefix + " "); + } + } + } + return printedSomething; + } + + public boolean dump(PrintWriter out, String title, String prefix, String packageName, + boolean printFilter) { + String innerPrefix = prefix + " "; + String sepPrefix = "\n" + prefix; + String curPrefix = title + "\n" + prefix; + if (dumpMap(out, curPrefix, "Full MIME Types:", innerPrefix, + mTypeToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + if (dumpMap(out, curPrefix, "Base MIME Types:", innerPrefix, + mBaseTypeToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + if (dumpMap(out, curPrefix, "Wild MIME Types:", innerPrefix, + mWildTypeToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + if (dumpMap(out, curPrefix, "Schemes:", innerPrefix, + mSchemeToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + if (dumpMap(out, curPrefix, "Non-Data Actions:", innerPrefix, + mActionToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + if (dumpMap(out, curPrefix, "MIME Typed Actions:", innerPrefix, + mTypedActionToFilter, packageName, printFilter)) { + curPrefix = sepPrefix; + } + return curPrefix == sepPrefix; + } + + private class IteratorWrapper implements Iterator<F> { + private final Iterator<F> mI; + private F mCur; + + IteratorWrapper(Iterator<F> it) { + mI = it; + } + + public boolean hasNext() { + return mI.hasNext(); + } + + public F next() { + return (mCur = mI.next()); + } + + public void remove() { + if (mCur != null) { + removeFilterInternal(mCur); + } + mI.remove(); + } + + } + + /** + * Returns an iterator allowing filters to be removed. + */ + public Iterator<F> filterIterator() { + return new IteratorWrapper(mFilters.iterator()); + } + + /** + * Returns a read-only set of the filters. + */ + public Set<F> filterSet() { + return Collections.unmodifiableSet(mFilters); + } + + public List<R> queryIntentFromList(Intent intent, String resolvedType, + boolean defaultOnly, ArrayList<F[]> listCut, int userId) { + ArrayList<R> resultList = new ArrayList<R>(); + + final boolean debug = localLOGV || + ((intent.getFlags() & Intent.FLAG_DEBUG_LOG_RESOLUTION) != 0); + + FastImmutableArraySet<String> categories = getFastIntentCategories(intent); + final String scheme = intent.getScheme(); + int N = listCut.size(); + for (int i = 0; i < N; ++i) { + buildResolveList(intent, categories, debug, defaultOnly, + resolvedType, scheme, listCut.get(i), resultList, userId); + } + sortResults(resultList); + return resultList; + } + + public List<R> queryIntent(Intent intent, String resolvedType, boolean defaultOnly, + int userId) { + String scheme = intent.getScheme(); + + ArrayList<R> finalList = new ArrayList<R>(); + + final boolean debug = localLOGV || + ((intent.getFlags() & Intent.FLAG_DEBUG_LOG_RESOLUTION) != 0); + + if (debug) Slog.v( + TAG, "Resolving type=" + resolvedType + " scheme=" + scheme + + " defaultOnly=" + defaultOnly + " userId=" + userId + " of " + intent); + + F[] firstTypeCut = null; + F[] secondTypeCut = null; + F[] thirdTypeCut = null; + F[] schemeCut = null; + + // If the intent includes a MIME type, then we want to collect all of + // the filters that match that MIME type. + if (resolvedType != null) { + int slashpos = resolvedType.indexOf('/'); + if (slashpos > 0) { + final String baseType = resolvedType.substring(0, slashpos); + if (!baseType.equals("*")) { + if (resolvedType.length() != slashpos+2 + || resolvedType.charAt(slashpos+1) != '*') { + // Not a wild card, so we can just look for all filters that + // completely match or wildcards whose base type matches. + firstTypeCut = mTypeToFilter.get(resolvedType); + if (debug) Slog.v(TAG, "First type cut: " + Arrays.toString(firstTypeCut)); + secondTypeCut = mWildTypeToFilter.get(baseType); + if (debug) Slog.v(TAG, "Second type cut: " + + Arrays.toString(secondTypeCut)); + } else { + // We can match anything with our base type. + firstTypeCut = mBaseTypeToFilter.get(baseType); + if (debug) Slog.v(TAG, "First type cut: " + Arrays.toString(firstTypeCut)); + secondTypeCut = mWildTypeToFilter.get(baseType); + if (debug) Slog.v(TAG, "Second type cut: " + + Arrays.toString(secondTypeCut)); + } + // Any */* types always apply, but we only need to do this + // if the intent type was not already */*. + thirdTypeCut = mWildTypeToFilter.get("*"); + if (debug) Slog.v(TAG, "Third type cut: " + Arrays.toString(thirdTypeCut)); + } else if (intent.getAction() != null) { + // The intent specified any type ({@literal *}/*). This + // can be a whole heck of a lot of things, so as a first + // cut let's use the action instead. + firstTypeCut = mTypedActionToFilter.get(intent.getAction()); + if (debug) Slog.v(TAG, "Typed Action list: " + Arrays.toString(firstTypeCut)); + } + } + } + + // If the intent includes a data URI, then we want to collect all of + // the filters that match its scheme (we will further refine matches + // on the authority and path by directly matching each resulting filter). + if (scheme != null) { + schemeCut = mSchemeToFilter.get(scheme); + if (debug) Slog.v(TAG, "Scheme list: " + Arrays.toString(schemeCut)); + } + + // If the intent does not specify any data -- either a MIME type or + // a URI -- then we will only be looking for matches against empty + // data. + if (resolvedType == null && scheme == null && intent.getAction() != null) { + firstTypeCut = mActionToFilter.get(intent.getAction()); + if (debug) Slog.v(TAG, "Action list: " + Arrays.toString(firstTypeCut)); + } + + FastImmutableArraySet<String> categories = getFastIntentCategories(intent); + if (firstTypeCut != null) { + buildResolveList(intent, categories, debug, defaultOnly, + resolvedType, scheme, firstTypeCut, finalList, userId); + } + if (secondTypeCut != null) { + buildResolveList(intent, categories, debug, defaultOnly, + resolvedType, scheme, secondTypeCut, finalList, userId); + } + if (thirdTypeCut != null) { + buildResolveList(intent, categories, debug, defaultOnly, + resolvedType, scheme, thirdTypeCut, finalList, userId); + } + if (schemeCut != null) { + buildResolveList(intent, categories, debug, defaultOnly, + resolvedType, scheme, schemeCut, finalList, userId); + } + sortResults(finalList); + + if (debug) { + Slog.v(TAG, "Final result list:"); + for (int i=0; i<finalList.size(); i++) { + Slog.v(TAG, " " + finalList.get(i)); + } + } + return finalList; + } + + /** + * Control whether the given filter is allowed to go into the result + * list. Mainly intended to prevent adding multiple filters for the + * same target object. + */ + protected boolean allowFilterResult(F filter, List<R> dest) { + return true; + } + + /** + * Returns whether the object associated with the given filter is + * "stopped," that is whether it should not be included in the result + * if the intent requests to excluded stopped objects. + */ + protected boolean isFilterStopped(F filter, int userId) { + return false; + } + + /** + * Returns whether this filter is owned by this package. This must be + * implemented to provide correct filtering of Intents that have + * specified a package name they are to be delivered to. + */ + protected abstract boolean isPackageForFilter(String packageName, F filter); + + protected abstract F[] newArray(int size); + + @SuppressWarnings("unchecked") + protected R newResult(F filter, int match, int userId) { + return (R)filter; + } + + @SuppressWarnings("unchecked") + protected void sortResults(List<R> results) { + Collections.sort(results, mResolvePrioritySorter); + } + + protected void dumpFilter(PrintWriter out, String prefix, F filter) { + out.print(prefix); out.println(filter); + } + + private final void addFilter(ArrayMap<String, F[]> map, String name, F filter) { + F[] array = map.get(name); + if (array == null) { + array = newArray(2); + map.put(name, array); + array[0] = filter; + } else { + final int N = array.length; + int i = N; + while (i > 0 && array[i-1] == null) { + i--; + } + if (i < N) { + array[i] = filter; + } else { + F[] newa = newArray((N*3)/2); + System.arraycopy(array, 0, newa, 0, N); + newa[N] = filter; + map.put(name, newa); + } + } + } + + private final int register_mime_types(F filter, String prefix) { + final Iterator<String> i = filter.typesIterator(); + if (i == null) { + return 0; + } + + int num = 0; + while (i.hasNext()) { + String name = i.next(); + num++; + if (localLOGV) Slog.v(TAG, prefix + name); + String baseName = name; + final int slashpos = name.indexOf('/'); + if (slashpos > 0) { + baseName = name.substring(0, slashpos).intern(); + } else { + name = name + "/*"; + } + + addFilter(mTypeToFilter, name, filter); + + if (slashpos > 0) { + addFilter(mBaseTypeToFilter, baseName, filter); + } else { + addFilter(mWildTypeToFilter, baseName, filter); + } + } + + return num; + } + + private final int unregister_mime_types(F filter, String prefix) { + final Iterator<String> i = filter.typesIterator(); + if (i == null) { + return 0; + } + + int num = 0; + while (i.hasNext()) { + String name = i.next(); + num++; + if (localLOGV) Slog.v(TAG, prefix + name); + String baseName = name; + final int slashpos = name.indexOf('/'); + if (slashpos > 0) { + baseName = name.substring(0, slashpos).intern(); + } else { + name = name + "/*"; + } + + remove_all_objects(mTypeToFilter, name, filter); + + if (slashpos > 0) { + remove_all_objects(mBaseTypeToFilter, baseName, filter); + } else { + remove_all_objects(mWildTypeToFilter, baseName, filter); + } + } + return num; + } + + private final int register_intent_filter(F filter, Iterator<String> i, + ArrayMap<String, F[]> dest, String prefix) { + if (i == null) { + return 0; + } + + int num = 0; + while (i.hasNext()) { + String name = i.next(); + num++; + if (localLOGV) Slog.v(TAG, prefix + name); + addFilter(dest, name, filter); + } + return num; + } + + private final int unregister_intent_filter(F filter, Iterator<String> i, + ArrayMap<String, F[]> dest, String prefix) { + if (i == null) { + return 0; + } + + int num = 0; + while (i.hasNext()) { + String name = i.next(); + num++; + if (localLOGV) Slog.v(TAG, prefix + name); + remove_all_objects(dest, name, filter); + } + return num; + } + + private final void remove_all_objects(ArrayMap<String, F[]> map, String name, + Object object) { + F[] array = map.get(name); + if (array != null) { + int LAST = array.length-1; + while (LAST >= 0 && array[LAST] == null) { + LAST--; + } + for (int idx=LAST; idx>=0; idx--) { + if (array[idx] == object) { + final int remain = LAST - idx; + if (remain > 0) { + System.arraycopy(array, idx+1, array, idx, remain); + } + array[LAST] = null; + LAST--; + } + } + if (LAST < 0) { + map.remove(name); + } else if (LAST < (array.length/2)) { + F[] newa = newArray(LAST+2); + System.arraycopy(array, 0, newa, 0, LAST+1); + map.put(name, newa); + } + } + } + + private static FastImmutableArraySet<String> getFastIntentCategories(Intent intent) { + final Set<String> categories = intent.getCategories(); + if (categories == null) { + return null; + } + return new FastImmutableArraySet<String>(categories.toArray(new String[categories.size()])); + } + + private void buildResolveList(Intent intent, FastImmutableArraySet<String> categories, + boolean debug, boolean defaultOnly, + String resolvedType, String scheme, F[] src, List<R> dest, int userId) { + final String action = intent.getAction(); + final Uri data = intent.getData(); + final String packageName = intent.getPackage(); + + final boolean excludingStopped = intent.isExcludingStopped(); + + final Printer logPrinter; + final PrintWriter logPrintWriter; + if (debug) { + logPrinter = new LogPrinter(Log.VERBOSE, TAG, Log.LOG_ID_SYSTEM); + logPrintWriter = new FastPrintWriter(logPrinter); + } else { + logPrinter = null; + logPrintWriter = null; + } + + final int N = src != null ? src.length : 0; + boolean hasNonDefaults = false; + int i; + F filter; + for (i=0; i<N && (filter=src[i]) != null; i++) { + int match; + if (debug) Slog.v(TAG, "Matching against filter " + filter); + + if (excludingStopped && isFilterStopped(filter, userId)) { + if (debug) { + Slog.v(TAG, " Filter's target is stopped; skipping"); + } + continue; + } + + // Is delivery being limited to filters owned by a particular package? + if (packageName != null && !isPackageForFilter(packageName, filter)) { + if (debug) { + Slog.v(TAG, " Filter is not from package " + packageName + "; skipping"); + } + continue; + } + + // Do we already have this one? + if (!allowFilterResult(filter, dest)) { + if (debug) { + Slog.v(TAG, " Filter's target already added"); + } + continue; + } + + match = filter.match(action, resolvedType, scheme, data, categories, TAG); + if (match >= 0) { + if (debug) Slog.v(TAG, " Filter matched! match=0x" + + Integer.toHexString(match) + " hasDefault=" + + filter.hasCategory(Intent.CATEGORY_DEFAULT)); + if (!defaultOnly || filter.hasCategory(Intent.CATEGORY_DEFAULT)) { + final R oneResult = newResult(filter, match, userId); + if (oneResult != null) { + dest.add(oneResult); + if (debug) { + dumpFilter(logPrintWriter, " ", filter); + logPrintWriter.flush(); + filter.dump(logPrinter, " "); + } + } + } else { + hasNonDefaults = true; + } + } else { + if (debug) { + String reason; + switch (match) { + case IntentFilter.NO_MATCH_ACTION: reason = "action"; break; + case IntentFilter.NO_MATCH_CATEGORY: reason = "category"; break; + case IntentFilter.NO_MATCH_DATA: reason = "data"; break; + case IntentFilter.NO_MATCH_TYPE: reason = "type"; break; + default: reason = "unknown reason"; break; + } + Slog.v(TAG, " Filter did not match: " + reason); + } + } + } + + if (hasNonDefaults) { + if (dest.size() == 0) { + Slog.w(TAG, "resolveIntent failed: found match, but none with CATEGORY_DEFAULT"); + } else if (dest.size() > 1) { + Slog.w(TAG, "resolveIntent: multiple matches, only some with CATEGORY_DEFAULT"); + } + } + } + + // Sorts a List of IntentFilter objects into descending priority order. + @SuppressWarnings("rawtypes") + private static final Comparator mResolvePrioritySorter = new Comparator() { + public int compare(Object o1, Object o2) { + final int q1 = ((IntentFilter) o1).getPriority(); + final int q2 = ((IntentFilter) o2).getPriority(); + return (q1 > q2) ? -1 : ((q1 < q2) ? 1 : 0); + } + }; + + /** + * All filters that have been registered. + */ + private final HashSet<F> mFilters = new HashSet<F>(); + + /** + * All of the MIME types that have been registered, such as "image/jpeg", + * "image/*", or "{@literal *}/*". + */ + private final ArrayMap<String, F[]> mTypeToFilter = new ArrayMap<String, F[]>(); + + /** + * The base names of all of all fully qualified MIME types that have been + * registered, such as "image" or "*". Wild card MIME types such as + * "image/*" will not be here. + */ + private final ArrayMap<String, F[]> mBaseTypeToFilter = new ArrayMap<String, F[]>(); + + /** + * The base names of all of the MIME types with a sub-type wildcard that + * have been registered. For example, a filter with "image/*" will be + * included here as "image" but one with "image/jpeg" will not be + * included here. This also includes the "*" for the "{@literal *}/*" + * MIME type. + */ + private final ArrayMap<String, F[]> mWildTypeToFilter = new ArrayMap<String, F[]>(); + + /** + * All of the URI schemes (such as http) that have been registered. + */ + private final ArrayMap<String, F[]> mSchemeToFilter = new ArrayMap<String, F[]>(); + + /** + * All of the actions that have been registered, but only those that did + * not specify data. + */ + private final ArrayMap<String, F[]> mActionToFilter = new ArrayMap<String, F[]>(); + + /** + * All of the actions that have been registered and specified a MIME type. + */ + private final ArrayMap<String, F[]> mTypedActionToFilter = new ArrayMap<String, F[]>(); +} |