forked from uber/NullAway
/
CompositeHandler.java
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/
CompositeHandler.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 com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.errorprone.VisitorState;
import com.sun.source.tree.ClassTree;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.LambdaExpressionTree;
import com.sun.source.tree.MemberReferenceTree;
import com.sun.source.tree.MethodInvocationTree;
import com.sun.source.tree.MethodTree;
import com.sun.source.tree.ReturnTree;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Types;
import com.sun.tools.javac.util.Context;
import com.uber.nullaway.ErrorMessage;
import com.uber.nullaway.NullAway;
import com.uber.nullaway.dataflow.AccessPath;
import com.uber.nullaway.dataflow.AccessPathNullnessPropagation;
import com.uber.nullaway.dataflow.NullnessStore;
import java.util.List;
import org.checkerframework.dataflow.cfg.UnderlyingAST;
import org.checkerframework.dataflow.cfg.node.LocalVariableNode;
import org.checkerframework.dataflow.cfg.node.MethodInvocationNode;
/**
* Registry of all handlers registered on our analysis.
*
* <p>In general, handlers are a way to specialize the behavior of our analysis on particular APIs
* or libraries that are not part of the core Java language (e.g. our io.reactivex.* support).
*/
class CompositeHandler implements Handler {
private final List<Handler> handlers;
CompositeHandler(ImmutableList<Handler> handlers) {
// Attach default handlers
this.handlers = handlers;
}
@Override
public void onMatchTopLevelClass(
NullAway analysis, ClassTree tree, VisitorState state, Symbol.ClassSymbol classSymbol) {
for (Handler h : handlers) {
h.onMatchTopLevelClass(analysis, tree, state, classSymbol);
}
}
@Override
public void onMatchMethod(
NullAway analysis, MethodTree tree, VisitorState state, Symbol.MethodSymbol methodSymbol) {
for (Handler h : handlers) {
h.onMatchMethod(analysis, tree, state, methodSymbol);
}
}
@Override
public void onMatchLambdaExpression(
NullAway analysis,
LambdaExpressionTree tree,
VisitorState state,
Symbol.MethodSymbol methodSymbol) {
for (Handler h : handlers) {
h.onMatchLambdaExpression(analysis, tree, state, methodSymbol);
}
}
@Override
public void onMatchMethodReference(
NullAway analysis,
MemberReferenceTree tree,
VisitorState state,
Symbol.MethodSymbol methodSymbol) {
for (Handler h : handlers) {
h.onMatchMethodReference(analysis, tree, state, methodSymbol);
}
}
@Override
public void onMatchMethodInvocation(
NullAway analysis,
MethodInvocationTree tree,
VisitorState state,
Symbol.MethodSymbol methodSymbol) {
for (Handler h : handlers) {
h.onMatchMethodInvocation(analysis, tree, state, methodSymbol);
}
}
@Override
public void onMatchReturn(NullAway analysis, ReturnTree tree, VisitorState state) {
for (Handler h : handlers) {
h.onMatchReturn(analysis, tree, state);
}
}
@Override
public ImmutableSet<Integer> onUnannotatedInvocationGetExplicitlyNullablePositions(
Context context,
Symbol.MethodSymbol methodSymbol,
ImmutableSet<Integer> explicitlyNullablePositions) {
for (Handler h : handlers) {
explicitlyNullablePositions =
h.onUnannotatedInvocationGetExplicitlyNullablePositions(
context, methodSymbol, explicitlyNullablePositions);
}
return explicitlyNullablePositions;
}
@Override
public boolean onUnannotatedInvocationGetExplicitlyNonNullReturn(
Symbol.MethodSymbol methodSymbol, boolean explicitlyNonNullReturn) {
for (Handler h : handlers) {
explicitlyNonNullReturn =
h.onUnannotatedInvocationGetExplicitlyNonNullReturn(
methodSymbol, explicitlyNonNullReturn);
}
return explicitlyNonNullReturn;
}
@Override
public ImmutableSet<Integer> onUnannotatedInvocationGetNonNullPositions(
NullAway analysis,
VisitorState state,
Symbol.MethodSymbol methodSymbol,
List<? extends ExpressionTree> actualParams,
ImmutableSet<Integer> nonNullPositions) {
for (Handler h : handlers) {
nonNullPositions =
h.onUnannotatedInvocationGetNonNullPositions(
analysis, state, methodSymbol, actualParams, nonNullPositions);
}
return nonNullPositions;
}
@Override
public boolean onOverrideMayBeNullExpr(
NullAway analysis, ExpressionTree expr, VisitorState state, boolean exprMayBeNull) {
for (Handler h : handlers) {
exprMayBeNull = h.onOverrideMayBeNullExpr(analysis, expr, state, exprMayBeNull);
}
return exprMayBeNull;
}
@Override
public NullnessStore.Builder onDataflowInitialStore(
UnderlyingAST underlyingAST,
List<LocalVariableNode> parameters,
NullnessStore.Builder result) {
for (Handler h : handlers) {
result = h.onDataflowInitialStore(underlyingAST, parameters, result);
}
return result;
}
@Override
public NullnessHint onDataflowVisitMethodInvocation(
MethodInvocationNode node,
Types types,
Context context,
AccessPathNullnessPropagation.SubNodeValues inputs,
AccessPathNullnessPropagation.Updates thenUpdates,
AccessPathNullnessPropagation.Updates elseUpdates,
AccessPathNullnessPropagation.Updates bothUpdates) {
NullnessHint nullnessHint = NullnessHint.UNKNOWN;
for (Handler h : handlers) {
NullnessHint n =
h.onDataflowVisitMethodInvocation(
node, types, context, inputs, thenUpdates, elseUpdates, bothUpdates);
nullnessHint = nullnessHint.merge(n);
}
return nullnessHint;
}
@Override
public void onDataflowVisitReturn(
ReturnTree tree, NullnessStore thenStore, NullnessStore elseStore) {
for (Handler h : handlers) {
h.onDataflowVisitReturn(tree, thenStore, elseStore);
}
}
@Override
public void onDataflowVisitLambdaResultExpression(
ExpressionTree tree, NullnessStore thenStore, NullnessStore elseStore) {
for (Handler h : handlers) {
h.onDataflowVisitLambdaResultExpression(tree, thenStore, elseStore);
}
}
@Override
public void onPrepareErrorMessage(
ExpressionTree expr, VisitorState state, ErrorMessage errorMessage) {
for (Handler h : handlers) {
h.onPrepareErrorMessage(expr, state, errorMessage);
}
}
@Override
public boolean includeApInfoInSavedContext(AccessPath accessPath, VisitorState state) {
boolean shouldFilter = false;
for (Handler h : handlers) {
shouldFilter |= h.includeApInfoInSavedContext(accessPath, state);
}
return shouldFilter;
}
}