org.checkerframework.checker.nullness.NullnessNoInitSubchecker Maven / Gradle / Ivy

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The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.checker.nullness;

import com.sun.source.tree.ClassTree;
import com.sun.source.tree.MethodTree;

import org.checkerframework.checker.initialization.InitializationChecker;
import org.checkerframework.checker.initialization.InitializationFieldAccessSubchecker;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.common.basetype.BaseTypeChecker;
import org.checkerframework.common.basetype.BaseTypeVisitor;

import java.util.NavigableSet;
import java.util.Set;

/**
 * The subchecker of the {@link NullnessChecker} which actually checks {@link NonNull} and related
 * qualifiers.
 *
 * The {@link NullnessChecker} uses this checker as the target (see {@link
 * InitializationChecker#getTargetCheckerClass()}) for its initialization type system.
 */
public class NullnessNoInitSubchecker extends BaseTypeChecker {

    /** Default constructor for NonNullChecker. */
    public NullnessNoInitSubchecker() {}

    @Override
    public NullnessNoInitAnnotatedTypeFactory getTypeFactory() {
        return (NullnessNoInitAnnotatedTypeFactory) super.getTypeFactory();
    }

    @Override
    protected Set> getImmediateSubcheckerClasses() {
        Set> checkers = super.getImmediateSubcheckerClasses();
        if (!hasOption("assumeKeyFor")) {
            checkers.add(KeyForSubchecker.class);
        }
        checkers.add(InitializationFieldAccessSubchecker.class);
        return checkers;
    }

    @Override
    public NavigableSet getSuppressWarningsPrefixes() {
        NavigableSet result = super.getSuppressWarningsPrefixes();
        result.add("nullness");
        return result;
    }

    @Override
    protected String getWarningMessagePrefix() {
        return "nullness";
    }

    @Override
    protected BaseTypeVisitor createSourceVisitor() {
        return new NullnessNoInitVisitor(this);
    }

    // The NullnessNoInitChecker should also skip defs skipped by the NullnessChecker

    @Override
    public boolean shouldSkipDefs(ClassTree tree) {
        return super.shouldSkipDefs(tree) || parentChecker.shouldSkipDefs(tree);
    }

    @Override
    public boolean shouldSkipDefs(ClassTree cls, MethodTree meth) {
        return super.shouldSkipDefs(cls, meth) || parentChecker.shouldSkipDefs(cls, meth);
    }
}