checker.src.org.checkerframework.checker.experimental.tainting_qual.TaintingQualifierHierarchy 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.experimental.tainting_qual;

import org.checkerframework.qualframework.base.QualifierHierarchy;

import static org.checkerframework.checker.experimental.tainting_qual.Tainting.*;

public class TaintingQualifierHierarchy implements QualifierHierarchy {
    @Override
    public boolean isSubtype(Tainting subtype, Tainting supertype) {
        return subtype == UNTAINTED || supertype == TAINTED;
    }

    @Override
    public Tainting leastUpperBound(Tainting a, Tainting b) {
        if (a == TAINTED || b == TAINTED) {
            return TAINTED;
        } else {
            return UNTAINTED;
        }
    }

    @Override
    public Tainting greatestLowerBound(Tainting a, Tainting b) {
        if (a == TAINTED && b == TAINTED) {
            return TAINTED;
        } else {
            return UNTAINTED;
        }
    }

    @Override
    public Tainting getTop() {
        return TAINTED;
    }

    @Override
    public Tainting getBottom() {
        return UNTAINTED;
    }
}