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LibraryModelsHandler.java
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LibraryModelsHandler.java
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/*
* Copyright (c) 2017 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.uber.nullaway.handlers;
import static com.uber.nullaway.LibraryModels.FieldRef.fieldRef;
import static com.uber.nullaway.LibraryModels.MethodRef.methodRef;
import static com.uber.nullaway.Nullness.NONNULL;
import static com.uber.nullaway.Nullness.NULLABLE;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSetMultimap;
import com.google.errorprone.VisitorState;
import com.google.errorprone.util.ASTHelpers;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.Tree;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Types;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Names;
import com.uber.nullaway.CodeAnnotationInfo;
import com.uber.nullaway.Config;
import com.uber.nullaway.LibraryModels;
import com.uber.nullaway.LibraryModels.MethodRef;
import com.uber.nullaway.NullAway;
import com.uber.nullaway.Nullness;
import com.uber.nullaway.dataflow.AccessPath;
import com.uber.nullaway.dataflow.AccessPathNullnessPropagation;
import com.uber.nullaway.handlers.stream.StreamTypeRecord;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.Set;
import java.util.function.Function;
import javax.annotation.Nullable;
import org.checkerframework.nullaway.dataflow.cfg.node.FieldAccessNode;
import org.checkerframework.nullaway.dataflow.cfg.node.MethodInvocationNode;
import org.checkerframework.nullaway.dataflow.cfg.node.Node;
/**
* This Handler deals with any methods from unannotated packages for which we need a nullability
* model.
*
* <p>It loads the required LibraryModels and inserts their nullability information at the right
* points through the flow of our analysis.
*/
public class LibraryModelsHandler extends BaseNoOpHandler {
private final Config config;
private final LibraryModels libraryModels;
@Nullable private OptimizedLibraryModels optLibraryModels;
public LibraryModelsHandler(Config config) {
super();
this.config = config;
libraryModels = loadLibraryModels(config);
}
@Override
public boolean onOverrideFieldNullability(Symbol field) {
return isNullableFieldInLibraryModels(field);
}
@Override
public NullnessHint onDataflowVisitFieldAccess(
FieldAccessNode node,
Symbol symbol,
Types types,
Context context,
AccessPath.AccessPathContext apContext,
AccessPathNullnessPropagation.SubNodeValues inputs,
AccessPathNullnessPropagation.Updates updates) {
return isNullableFieldInLibraryModels(symbol)
? NullnessHint.HINT_NULLABLE
: NullnessHint.UNKNOWN;
}
@Override
public Nullness[] onOverrideMethodInvocationParametersNullability(
Context context,
Symbol.MethodSymbol methodSymbol,
boolean isAnnotated,
Nullness[] argumentPositionNullness) {
OptimizedLibraryModels optimizedLibraryModels = getOptLibraryModels(context);
ImmutableSet<Integer> nullableParamsFromModel =
optimizedLibraryModels.explicitlyNullableParameters(methodSymbol);
ImmutableSet<Integer> nonNullParamsFromModel =
optimizedLibraryModels.nonNullParameters(methodSymbol);
// For sanity check: $ nonNullParamsFromModel \cap nullableParamsFromModel $ should be empty
Set<Integer> allPositions = new HashSet<>();
for (Integer nullParam : nullableParamsFromModel) {
allPositions.add(nullParam);
argumentPositionNullness[nullParam] = NULLABLE;
}
for (Integer nonNullParam : nonNullParamsFromModel) {
if (!allPositions.add(nonNullParam)) {
// position was already marked as nullable
throw new IllegalStateException(
String.format(
"Library models give conflicting nullability for the following parameter of method %s: %s",
methodSymbol.getQualifiedName().toString(), nonNullParam.toString()));
}
argumentPositionNullness[nonNullParam] = NONNULL;
}
return argumentPositionNullness;
}
@Override
public Nullness onOverrideMethodReturnNullability(
Symbol.MethodSymbol methodSymbol,
VisitorState state,
boolean isAnnotated,
Nullness returnNullness) {
OptimizedLibraryModels optLibraryModels = getOptLibraryModels(state.context);
if (optLibraryModels.hasNonNullReturn(methodSymbol, state.getTypes(), !isAnnotated)) {
return NONNULL;
} else if (optLibraryModels.hasNullableReturn(methodSymbol, state.getTypes(), !isAnnotated)) {
return NULLABLE;
}
return returnNullness;
}
@Override
public boolean onOverrideMayBeNullExpr(
NullAway analysis,
ExpressionTree expr,
@Nullable Symbol exprSymbol,
VisitorState state,
boolean exprMayBeNull) {
if (isNullableFieldInLibraryModels(exprSymbol)) {
return true;
}
if (!(expr.getKind() == Tree.Kind.METHOD_INVOCATION
&& exprSymbol instanceof Symbol.MethodSymbol)) {
return exprMayBeNull;
}
OptimizedLibraryModels optLibraryModels = getOptLibraryModels(state.context);
Symbol.MethodSymbol methodSymbol = (Symbol.MethodSymbol) exprSymbol;
// When looking up library models of annotated code, we match the exact method signature only;
// overriding methods in subclasses must be explicitly given their own library model.
// When dealing with unannotated code, we default to generality: a model applies to a method
// and any of its overriding implementations.
// see https://github.com/uber/NullAway/issues/445 for why this is needed.
boolean isMethodUnannotated =
getCodeAnnotationInfo(state.context).isSymbolUnannotated(methodSymbol, this.config, null);
if (exprMayBeNull) {
// This is the only case in which we may switch the result from @Nullable to @NonNull:
return !optLibraryModels.hasNonNullReturn(
methodSymbol, state.getTypes(), isMethodUnannotated);
}
if (optLibraryModels.hasNullableReturn(methodSymbol, state.getTypes(), isMethodUnannotated)) {
return true;
}
if (!optLibraryModels.nullImpliesNullParameters(methodSymbol).isEmpty()) {
return true;
}
return false;
}
@Override
@Nullable
public Integer castToNonNullArgumentPositionsForMethod(
NullAway analysis,
VisitorState state,
Symbol.MethodSymbol methodSymbol,
List<? extends ExpressionTree> actualParams,
@Nullable Integer previousArgumentPosition) {
OptimizedLibraryModels optLibraryModels = getOptLibraryModels(state.context);
ImmutableSet<Integer> newPositions = optLibraryModels.castToNonNullMethod(methodSymbol);
if (newPositions.size() > 1) {
// Library models sanity check
String qualifiedName =
ASTHelpers.enclosingClass(methodSymbol) + "." + methodSymbol.getSimpleName().toString();
throw new IllegalStateException(
"Found multiple applicable castToNonNull library models for the same method signature: "
+ qualifiedName);
}
// Override if an argument position was found from the library models, otherwise propagate
// previousArgumentPosition
return newPositions.stream().findAny().orElse(previousArgumentPosition);
}
@Nullable private CodeAnnotationInfo codeAnnotationInfo;
private CodeAnnotationInfo getCodeAnnotationInfo(Context context) {
if (codeAnnotationInfo == null) {
codeAnnotationInfo = CodeAnnotationInfo.instance(context);
}
return codeAnnotationInfo;
}
@Override
public NullnessHint onDataflowVisitMethodInvocation(
MethodInvocationNode node,
Symbol.MethodSymbol callee,
VisitorState state,
AccessPath.AccessPathContext apContext,
AccessPathNullnessPropagation.SubNodeValues inputs,
AccessPathNullnessPropagation.Updates thenUpdates,
AccessPathNullnessPropagation.Updates elseUpdates,
AccessPathNullnessPropagation.Updates bothUpdates) {
boolean isMethodAnnotated =
!getCodeAnnotationInfo(state.context).isSymbolUnannotated(callee, this.config, null);
setUnconditionalArgumentNullness(bothUpdates, node.getArguments(), callee, state, apContext);
setConditionalArgumentNullness(
thenUpdates, elseUpdates, node.getArguments(), callee, state, apContext);
OptimizedLibraryModels optLibraryModels = getOptLibraryModels(state.context);
ImmutableSet<Integer> nullImpliesNullIndexes =
optLibraryModels.nullImpliesNullParameters(callee);
if (!nullImpliesNullIndexes.isEmpty()) {
// If the method is marked as having argument dependent nullability and any of the
// corresponding arguments is null, then the return is nullable. If the method is
// marked as having argument dependent nullability but NONE of the corresponding
// arguments is null, then the return should be non-null.
boolean anyNull = false;
for (int idx : nullImpliesNullIndexes) {
if (!inputs.valueOfSubNode(node.getArgument(idx)).equals(NONNULL)) {
anyNull = true;
break;
}
}
return anyNull ? NullnessHint.HINT_NULLABLE : NullnessHint.FORCE_NONNULL;
}
Types types = state.getTypes();
if (optLibraryModels.hasNonNullReturn(callee, types, !isMethodAnnotated)) {
return NullnessHint.FORCE_NONNULL;
} else if (optLibraryModels.hasNullableReturn(callee, types, !isMethodAnnotated)) {
return NullnessHint.HINT_NULLABLE;
} else {
return NullnessHint.UNKNOWN;
}
}
/**
* Check if the given symbol is a field that is marked as nullable in any of our library models.
*
* @param symbol The symbol to check.
* @return True if the symbol is a field that is marked as nullable in any of our library models.
*/
private boolean isNullableFieldInLibraryModels(@Nullable Symbol symbol) {
if (libraryModels.nullableFields().isEmpty()) {
// no need to do any work if there are no nullable fields.
return false;
}
if (symbol instanceof Symbol.VarSymbol && symbol.getKind().isField()) {
Symbol.VarSymbol varSymbol = (Symbol.VarSymbol) symbol;
Symbol.ClassSymbol classSymbol = varSymbol.enclClass();
if (classSymbol == null) {
// e.g. .class expressions
return false;
}
String fieldName = varSymbol.getSimpleName().toString();
String enclosingClassName = classSymbol.flatName().toString();
// This check could be optimized further in the future if needed
return libraryModels.nullableFields().contains(fieldRef(enclosingClassName, fieldName));
}
return false;
}
private void setConditionalArgumentNullness(
AccessPathNullnessPropagation.Updates thenUpdates,
AccessPathNullnessPropagation.Updates elseUpdates,
List<Node> arguments,
Symbol.MethodSymbol callee,
VisitorState state,
AccessPath.AccessPathContext apContext) {
OptimizedLibraryModels optLibraryModels = getOptLibraryModels(state.context);
Set<Integer> nullImpliesTrueParameters = optLibraryModels.nullImpliesTrueParameters(callee);
for (AccessPath accessPath :
accessPathsAtIndexes(nullImpliesTrueParameters, arguments, state, apContext)) {
elseUpdates.set(accessPath, NONNULL);
}
Set<Integer> nullImpliesFalseParameters = optLibraryModels.nullImpliesFalseParameters(callee);
for (AccessPath accessPath :
accessPathsAtIndexes(nullImpliesFalseParameters, arguments, state, apContext)) {
thenUpdates.set(accessPath, NONNULL);
}
}
private static Iterable<AccessPath> accessPathsAtIndexes(
Set<Integer> indexes,
List<Node> arguments,
VisitorState state,
AccessPath.AccessPathContext apContext) {
List<AccessPath> result = new ArrayList<>();
for (Integer i : indexes) {
Preconditions.checkArgument(i >= 0 && i < arguments.size(), "Invalid argument index: " + i);
if (i >= 0 && i < arguments.size()) {
Node argument = arguments.get(i);
AccessPath ap = AccessPath.getAccessPathForNode(argument, state, apContext);
if (ap != null) {
result.add(ap);
}
}
}
return result;
}
private OptimizedLibraryModels getOptLibraryModels(Context context) {
if (optLibraryModels == null) {
optLibraryModels = new OptimizedLibraryModels(libraryModels, context);
}
return optLibraryModels;
}
private void setUnconditionalArgumentNullness(
AccessPathNullnessPropagation.Updates bothUpdates,
List<Node> arguments,
Symbol.MethodSymbol callee,
VisitorState state,
AccessPath.AccessPathContext apContext) {
Set<Integer> requiredNonNullParameters =
getOptLibraryModels(state.context).failIfNullParameters(callee);
for (AccessPath accessPath :
accessPathsAtIndexes(requiredNonNullParameters, arguments, state, apContext)) {
bothUpdates.set(accessPath, NONNULL);
}
}
@Override
public boolean onOverrideTypeParameterUpperBound(String className, int index) {
ImmutableSet<Integer> res = libraryModels.typeVariablesWithNullableUpperBounds().get(className);
return res.contains(index);
}
@Override
public boolean onOverrideNullMarkedClasses(String className) {
return libraryModels.nullMarkedClasses().contains(className);
}
/**
* Get all the stream specifications loaded from any of our library models.
*
* <p>This is used in Handlers.java to create a StreamNullabilityPropagator handler, which gets
* registered independently of this LibraryModelsHandler itself.
*
* <p>LibraryModelsHandler is responsible from reading the library models for stream specs, but
* beyond that, checking of the specs falls under the responsibility of the generated
* StreamNullabilityPropagator handler.
*
* @return The list of all stream specifications loaded from any of our library models.
*/
public ImmutableList<StreamTypeRecord> getStreamNullabilitySpecs() {
// Note: Currently, OptimizedLibraryModels doesn't carry the information about stream type
// records, it is not clear what it means to "optimize" lookup for those and they get accessed
// only once by calling this method during handler setup in Handlers.java.
return libraryModels.customStreamNullabilitySpecs();
}
private static LibraryModels loadLibraryModels(Config config) {
Iterable<LibraryModels> externalLibraryModels =
ServiceLoader.load(LibraryModels.class, LibraryModels.class.getClassLoader());
ImmutableSet.Builder<LibraryModels> libModelsBuilder = new ImmutableSet.Builder<>();
libModelsBuilder.add(new DefaultLibraryModels()).addAll(externalLibraryModels);
return new CombinedLibraryModels(libModelsBuilder.build(), config);
}
private static class DefaultLibraryModels implements LibraryModels {
private static final ImmutableSetMultimap<MethodRef, Integer> FAIL_IF_NULL_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(methodRef("com.google.common.base.Preconditions", "<T>checkNotNull(T)"), 0)
.put(
methodRef(
"com.google.common.base.Preconditions", "<T>checkNotNull(T,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object...)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,char)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,int)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,long)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,char,char)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,char,int)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,char,long)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,char,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,int,char)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,int,int)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,int,long)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,int,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,long,char)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,long,int)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,long,long)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,long,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,char)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,int)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,long)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,java.lang.Object,java.lang.Object)"),
0)
.put(
methodRef(
"com.google.common.base.Preconditions",
"<T>checkNotNull(T,java.lang.String,java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object)"),
0)
.put(methodRef("com.google.common.base.Verify", "<T>verifyNotNull(T)"), 0)
.put(
methodRef(
"com.google.common.base.Verify",
"<T>verifyNotNull(T,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("java.util.Objects", "<T>requireNonNull(T)"), 0)
.put(methodRef("java.util.Objects", "<T>requireNonNull(T,java.lang.String)"), 0)
.put(
methodRef(
"java.util.Objects",
"<T>requireNonNull(T,java.util.function.Supplier<java.lang.String>)"),
0)
.put(methodRef("org.junit.Assert", "assertNotNull(java.lang.Object)"), 0)
.put(
methodRef("org.junit.Assert", "assertNotNull(java.lang.String,java.lang.Object)"),
1)
.put(
methodRef("org.junit.jupiter.api.Assertions", "assertNotNull(java.lang.Object)"), 0)
.put(
methodRef(
"org.junit.jupiter.api.Assertions",
"assertNotNull(java.lang.Object,java.lang.String)"),
0)
.put(
methodRef(
"org.junit.jupiter.api.Assertions",
"assertNotNull(java.lang.Object,java.util.function.Supplier<java.lang.String>)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>notNull(T)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>notNull(T,java.lang.String,java.lang.Object...)"),
0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>notEmpty(T[],java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>notEmpty(T[])"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>notEmpty(T,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>notEmpty(T)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>notBlank(T,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>notBlank(T)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>noNullElements(T[],java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>noNullElements(T[])"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>noNullElements(T,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>noNullElements(T)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>validIndex(T[],int,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>validIndex(T[],int)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.Validate",
"<T>validIndex(T,int,java.lang.String,java.lang.Object...)"),
0)
.put(methodRef("org.apache.commons.lang3.Validate", "<T>validIndex(T,int)"), 0)
.build();
private static final ImmutableSetMultimap<MethodRef, Integer> EXPLICITLY_NULLABLE_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(
methodRef("android.app.Service", "onStartCommand(android.content.Intent,int,int)"),
0)
.put(
methodRef(
"android.view.GestureDetector.OnGestureListener",
"onScroll(android.view.MotionEvent,android.view.MotionEvent,float,float)"),
0)
.build();
private static final ImmutableSetMultimap<MethodRef, Integer> NON_NULL_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(
methodRef(
"com.android.sdklib.build.ApkBuilder",
"ApkBuilder(java.io.File,java.io.File,java.io.File,java.lang.String,java.io.PrintStream)"),
0)
.put(
methodRef(
"com.android.sdklib.build.ApkBuilder",
"ApkBuilder(java.io.File,java.io.File,java.io.File,java.lang.String,java.io.PrintStream)"),
1)
.put(methodRef("com.google.common.collect.ImmutableList.Builder", "add(E)"), 0)
.put(
methodRef(
"com.google.common.collect.ImmutableList.Builder",
"addAll(java.lang.Iterable<? extends E>)"),
0)
.put(methodRef("com.google.common.collect.ImmutableSet.Builder", "add(E)"), 0)
.put(
methodRef(
"com.google.common.collect.ImmutableSet.Builder",
"addAll(java.lang.Iterable<? extends E>)"),
0)
.put(methodRef("com.google.common.collect.ImmutableSortedSet.Builder", "add(E)"), 0)
.put(
methodRef(
"com.google.common.collect.ImmutableSortedSet.Builder",
"addAll(java.lang.Iterable<? extends E>)"),
0)
.put(
methodRef(
"com.google.common.collect.Iterables",
"<T>getFirst(java.lang.Iterable<? extends T>,T)"),
0)
.put(
methodRef(
"com.google.common.util.concurrent.SettableFuture",
"setException(java.lang.Throwable)"),
0)
.put(methodRef("com.google.common.base.Function", "apply(F)"), 0)
.put(methodRef("com.google.common.base.Predicate", "apply(T)"), 0)
.put(methodRef("com.google.common.util.concurrent.AsyncFunction", "apply(I)"), 0)
.put(methodRef("java.io.File", "File(java.lang.String)"), 0)
.put(methodRef("java.lang.Class", "getResource(java.lang.String)"), 0)
.put(methodRef("java.lang.Class", "isAssignableFrom(java.lang.Class<?>)"), 0)
.put(methodRef("java.lang.System", "getProperty(java.lang.String)"), 0)
.put(
methodRef(
"java.net.URLClassLoader", "newInstance(java.net.URL[],java.lang.ClassLoader)"),
0)
.put(
methodRef(
"javax.lang.model.element.Element", "<A>getAnnotation(java.lang.Class<A>)"),
0)
.put(
methodRef(
"javax.lang.model.util.Elements", "getPackageElement(java.lang.CharSequence)"),
0)
.put(
methodRef(
"javax.lang.model.util.Elements", "getTypeElement(java.lang.CharSequence)"),
0)
.put(
methodRef(
"javax.lang.model.util.Elements",
"getDocComment(javax.lang.model.element.Element)"),
0)
.put(methodRef("java.util.Optional", "<T>of(T)"), 0)
.put(methodRef("java.util.Deque", "addFirst(E)"), 0)
.put(methodRef("java.util.Deque", "addLast(E)"), 0)
.put(methodRef("java.util.Deque", "offerFirst(E)"), 0)
.put(methodRef("java.util.Deque", "offerLast(E)"), 0)
.put(methodRef("java.util.Deque", "add(E)"), 0)
.put(methodRef("java.util.Deque", "offer(E)"), 0)
.put(methodRef("java.util.Deque", "push(E)"), 0)
.put(methodRef("java.util.Collection", "<T>toArray(T[])"), 0)
.put(methodRef("java.util.ArrayDeque", "addFirst(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "addLast(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "offerFirst(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "offerLast(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "add(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "offer(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "push(E)"), 0)
.put(methodRef("java.util.ArrayDeque", "<T>toArray(T[])"), 0)
.put(
methodRef(
"java.nio.file.Files",
"isDirectory(java.nio.file.Path,java.nio.file.LinkOption...)"),
0)
.build();
private static final ImmutableSetMultimap<MethodRef, Integer> NULL_IMPLIES_TRUE_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(methodRef("com.google.common.base.Strings", "isNullOrEmpty(java.lang.String)"), 0)
.put(
methodRef("com.google.api.client.util.Strings", "isNullOrEmpty(java.lang.String)"),
0)
.put(methodRef("java.util.Objects", "isNull(java.lang.Object)"), 0)
.put(
methodRef("org.springframework.util.ObjectUtils", "isEmpty(java.lang.Object[])"), 0)
.put(
methodRef(
"org.springframework.util.CollectionUtils", "isEmpty(java.util.Collection<?>)"),
0)
.put(methodRef("org.springframework.util.StringUtils", "isEmpty(java.lang.Object)"), 0)
.put(methodRef("org.springframework.util.ObjectUtils", "isEmpty(java.lang.Object)"), 0)
.put(methodRef("spark.utils.ObjectUtils", "isEmpty(java.lang.Object[])"), 0)
.put(methodRef("spark.utils.CollectionUtils", "isEmpty(java.util.Collection<?>)"), 0)
.put(methodRef("spark.utils.StringUtils", "isEmpty(java.lang.Object)"), 0)
.put(methodRef("spark.utils.StringUtils", "isBlank(java.lang.CharSequence)"), 0)
.put(methodRef("android.text.TextUtils", "isEmpty(java.lang.CharSequence)"), 0)
.put(methodRef("org.apache.commons.lang.StringUtils", "isEmpty(java.lang.String)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.StringUtils", "isEmpty(java.lang.CharSequence)"),
0)
.put(methodRef("org.apache.commons.lang.StringUtils", "isBlank(java.lang.String)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.StringUtils", "isBlank(java.lang.CharSequence)"),
0)
.put(methodRef("org.apache.commons.lang3.ObjectUtils", "isEmpty(java.lang.Object)"), 0)
.build();
private static final ImmutableSetMultimap<MethodRef, Integer> NULL_IMPLIES_FALSE_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(methodRef("java.lang.Class", "isInstance(java.lang.Object)"), 0)
.put(methodRef("java.util.Objects", "nonNull(java.lang.Object)"), 0)
.put(
methodRef("org.springframework.util.StringUtils", "hasLength(java.lang.String)"), 0)
.put(methodRef("org.springframework.util.StringUtils", "hasText(java.lang.String)"), 0)
.put(
methodRef(
"org.springframework.util.StringUtils", "hasText(java.lang.CharSequence)"),
0)
.put(methodRef("spark.utils.CollectionUtils", "isNotEmpty(java.util.Collection<?>)"), 0)
.put(methodRef("spark.utils.StringUtils", "isNotEmpty(java.lang.String)"), 0)
.put(methodRef("spark.utils.StringUtils", "isNotBlank(java.lang.CharSequence)"), 0)
.put(methodRef("spark.utils.StringUtils", "hasLength(java.lang.String)"), 0)
.put(methodRef("spark.utils.StringUtils", "hasLength(java.lang.CharSequence)"), 0)
.put(
methodRef("org.apache.commons.lang.StringUtils", "isNotEmpty(java.lang.String)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.StringUtils", "isNotEmpty(java.lang.CharSequence)"),
0)
.put(
methodRef("org.apache.commons.lang.StringUtils", "isNotBlank(java.lang.String)"), 0)
.put(
methodRef(
"org.apache.commons.lang3.StringUtils", "isNotBlank(java.lang.CharSequence)"),
0)
.put(
methodRef("org.apache.commons.lang3.ObjectUtils", "isNotEmpty(java.lang.Object)"),
0)
.build();
private static final ImmutableSetMultimap<MethodRef, Integer> NULL_IMPLIES_NULL_PARAMETERS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>()
.put(methodRef("java.lang.Class", "cast(java.lang.Object)"), 0)
.put(methodRef("java.util.Optional", "orElse(T)"), 0)
.put(methodRef("com.google.common.io.Closer", "<C>register(C)"), 0)
.put(methodRef("java.util.Map", "getOrDefault(java.lang.Object,V)"), 1)
// We add ImmutableMap.getOrDefault explicitly, since when
// AcknowledgeRestrictiveAnnotations is enabled, the explicit annotations in the code
// override the inherited library model
.put(
methodRef(
"com.google.common.collect.ImmutableMap", "getOrDefault(java.lang.Object,V)"),
1)
.build();
private static final ImmutableSet<MethodRef> NULLABLE_RETURNS =
new ImmutableSet.Builder<MethodRef>()
.add(methodRef("com.sun.source.tree.CompilationUnitTree", "getPackageName()"))
.add(methodRef("java.lang.Throwable", "getMessage()"))
.add(methodRef("java.lang.Throwable", "getLocalizedMessage()"))
.add(methodRef("java.lang.Throwable", "getCause()"))
.add(methodRef("java.lang.ref.Reference", "get()"))
.add(methodRef("java.lang.ref.PhantomReference", "get()"))
.add(methodRef("java.lang.ref.SoftReference", "get()"))
.add(methodRef("java.lang.ref.WeakReference", "get()"))
.add(methodRef("java.nio.file.Path", "getParent()"))
.add(methodRef("java.util.concurrent.atomic.AtomicReference", "get()"))
.add(methodRef("java.util.Map", "get(java.lang.Object)"))
.add(methodRef("javax.lang.model.element.Element", "getEnclosingElement()"))
.add(methodRef("javax.lang.model.element.ExecutableElement", "getDefaultValue()"))
.add(methodRef("javax.lang.model.element.PackageElement", "getEnclosingElement()"))
.add(methodRef("javax.lang.model.element.VariableElement", "getConstantValue()"))
.add(methodRef("javax.lang.model.type.WildcardType", "getSuperBound()"))
.add(methodRef("android.app.ActivityManager", "getRunningAppProcesses()"))
.add(methodRef("android.view.View", "getHandler()"))
.add(methodRef("android.webkit.WebView", "getUrl()"))
.add(methodRef("android.widget.TextView", "getLayout()"))
.add(methodRef("java.lang.System", "console()"))
.build();
private static final ImmutableSet<MethodRef> NONNULL_RETURNS =
new ImmutableSet.Builder<MethodRef>()
.add(methodRef("com.google.gson", "<T>fromJson(String,Class)"))
.add(methodRef("com.google.common.base.Function", "apply(F)"))
.add(methodRef("com.google.common.base.Predicate", "apply(T)"))
.add(methodRef("com.google.common.util.concurrent.AsyncFunction", "apply(I)"))
.add(methodRef("android.app.Activity", "<T>findViewById(int)"))
.add(methodRef("android.view.View", "<T>findViewById(int)"))
.add(methodRef("android.view.View", "getResources()"))
.add(methodRef("android.view.ViewGroup", "getChildAt(int)"))
.add(
methodRef(
"android.content.res.Resources",
"getDrawable(int,android.content.res.Resources.Theme)"))
.add(methodRef("android.support.v4.app.Fragment", "getActivity()"))
.add(methodRef("androidx.fragment.app.Fragment", "getActivity()"))
.add(methodRef("android.support.v4.app.Fragment", "getArguments()"))
.add(methodRef("androidx.fragment.app.Fragment", "getArguments()"))
.add(methodRef("android.support.v4.app.Fragment", "getContext()"))
.add(methodRef("androidx.fragment.app.Fragment", "getContext()"))
.add(
methodRef(
"android.support.v4.app.Fragment",
"onCreateView(android.view.LayoutInflater,android.view.ViewGroup,android.os.Bundle)"))
.add(
methodRef(
"androidx.fragment.app.Fragment",
"onCreateView(android.view.LayoutInflater,android.view.ViewGroup,android.os.Bundle)"))
.add(
methodRef(
"android.support.v4.content.ContextCompat",
"getDrawable(android.content.Context,int)"))
.add(
methodRef(
"androidx.core.content.ContextCompat",
"getDrawable(android.content.Context,int)"))
.add(methodRef("android.support.v7.app.AppCompatDialog", "<T>findViewById(int)"))
.add(methodRef("androidx.appcompat.app.AppCompatDialog", "<T>findViewById(int)"))
.add(
methodRef(
"android.support.v7.content.res.AppCompatResources",
"getDrawable(android.content.Context,int)"))
.add(
methodRef(
"androidx.appcompat.content.res.AppCompatResources",
"getDrawable(android.content.Context,int)"))
.add(methodRef("android.support.design.widget.TextInputLayout", "getEditText()"))
.build();
private static final ImmutableSetMultimap<String, Integer> NULLABLE_VARIABLE_TYPE_UPPER_BOUNDS =
new ImmutableSetMultimap.Builder<String, Integer>()
.put("java.util.function.Function", 0)
.put("java.util.function.Function", 1)
.build();
private static final ImmutableSet<String> NULLMARKED_CLASSES =
new ImmutableSet.Builder<String>().add("java.util.function.Function").build();
private static final ImmutableSetMultimap<MethodRef, Integer> CAST_TO_NONNULL_METHODS =
new ImmutableSetMultimap.Builder<MethodRef, Integer>().build();
@Override
public ImmutableSetMultimap<MethodRef, Integer> failIfNullParameters() {
return FAIL_IF_NULL_PARAMETERS;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> explicitlyNullableParameters() {
return EXPLICITLY_NULLABLE_PARAMETERS;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> nonNullParameters() {
return NON_NULL_PARAMETERS;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> nullImpliesTrueParameters() {
return NULL_IMPLIES_TRUE_PARAMETERS;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> nullImpliesFalseParameters() {
return NULL_IMPLIES_FALSE_PARAMETERS;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> nullImpliesNullParameters() {
return NULL_IMPLIES_NULL_PARAMETERS;
}
@Override
public ImmutableSet<MethodRef> nullableReturns() {
return NULLABLE_RETURNS;
}
@Override
public ImmutableSet<MethodRef> nonNullReturns() {
return NONNULL_RETURNS;
}
@Override
public ImmutableSetMultimap<String, Integer> typeVariablesWithNullableUpperBounds() {
return NULLABLE_VARIABLE_TYPE_UPPER_BOUNDS;
}
@Override
public ImmutableSet<String> nullMarkedClasses() {
return NULLMARKED_CLASSES;
}
@Override
public ImmutableSetMultimap<MethodRef, Integer> castToNonNullMethods() {
return CAST_TO_NONNULL_METHODS;
}
@Override
public ImmutableSet<FieldRef> nullableFields() {
// No nullable fields by default.
return ImmutableSet.of();
}
}
private static class CombinedLibraryModels implements LibraryModels {
private final Config config;
private final ImmutableSetMultimap<MethodRef, Integer> failIfNullParameters;
private final ImmutableSetMultimap<MethodRef, Integer> explicitlyNullableParameters;
private final ImmutableSetMultimap<MethodRef, Integer> nonNullParameters;
private final ImmutableSetMultimap<MethodRef, Integer> nullImpliesTrueParameters;
private final ImmutableSetMultimap<MethodRef, Integer> nullImpliesFalseParameters;
private final ImmutableSetMultimap<MethodRef, Integer> nullImpliesNullParameters;
private final ImmutableSet<MethodRef> nullableReturns;
private final ImmutableSet<MethodRef> nonNullReturns;
private final ImmutableSetMultimap<String, Integer> nullableVariableTypeUpperBounds;
private final ImmutableSet<String> nullMarkedClasses;
private final ImmutableSet<FieldRef> nullableFields;
private final ImmutableSetMultimap<MethodRef, Integer> castToNonNullMethods;
private final ImmutableList<StreamTypeRecord> customStreamNullabilitySpecs;
public CombinedLibraryModels(Iterable<LibraryModels> models, Config config) {
this.config = config;
ImmutableSetMultimap.Builder<MethodRef, Integer> failIfNullParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> explicitlyNullableParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> nonNullParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSetMultimap.Builder<String, Integer> nullableVariableTypeUpperBoundsBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSet.Builder<String> nullMarkedClassesBuilder = new ImmutableSet.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> nullImpliesTrueParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> nullImpliesFalseParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> nullImpliesNullParametersBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableSet.Builder<MethodRef> nullableReturnsBuilder = new ImmutableSet.Builder<>();
ImmutableSet.Builder<MethodRef> nonNullReturnsBuilder = new ImmutableSet.Builder<>();
ImmutableSetMultimap.Builder<MethodRef, Integer> castToNonNullMethodsBuilder =
new ImmutableSetMultimap.Builder<>();
ImmutableList.Builder<StreamTypeRecord> customStreamNullabilitySpecsBuilder =
new ImmutableList.Builder<>();
ImmutableSet.Builder<FieldRef> nullableFieldsBuilder = new ImmutableSet.Builder<>();
for (LibraryModels libraryModels : models) {
for (Map.Entry<MethodRef, Integer> entry : libraryModels.failIfNullParameters().entries()) {
if (shouldSkipModel(entry.getKey())) {
continue;
}
failIfNullParametersBuilder.put(entry);
}
for (Map.Entry<MethodRef, Integer> entry :
libraryModels.explicitlyNullableParameters().entries()) {
if (shouldSkipModel(entry.getKey())) {
continue;
}
explicitlyNullableParametersBuilder.put(entry);
}
for (Map.Entry<MethodRef, Integer> entry : libraryModels.nonNullParameters().entries()) {
if (shouldSkipModel(entry.getKey())) {
continue;
}
nonNullParametersBuilder.put(entry);
}
for (Map.Entry<MethodRef, Integer> entry :
libraryModels.nullImpliesTrueParameters().entries()) {
if (shouldSkipModel(entry.getKey())) {
continue;
}
nullImpliesTrueParametersBuilder.put(entry);
}
for (Map.Entry<MethodRef, Integer> entry :
libraryModels.nullImpliesFalseParameters().entries()) {