Java Code Examples for proguard.classfile.Clazz#hierarchyAccept()

/**
 * Returns whether the given method is overridden anywhere down the class
 * hierarchy.
 */
public boolean isOverriden(Clazz  clazz,
                           Method method)
{
    String name       = method.getName(clazz);
    String descriptor = method.getDescriptor(clazz);

    // Go looking for the method down the class hierarchy.
    try
    {
        this.clazz  = null;
        this.member = null;

        clazz.hierarchyAccept(false, false, false, true,
            new NamedMethodVisitor(name, descriptor,
            new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE, this)));
    }
    catch (MemberFoundException ex)
    {
        // We've found an overriding method.
        return true;
    }

    return false;
}
 

/**
 * Returns whether the given field is shadowed anywhere down the class
 * hierarchy.
 */
public boolean isShadowed(Clazz clazz,
                          Field field)
{
    String name       = field.getName(clazz);
    String descriptor = field.getDescriptor(clazz);

    // Go looking for the field down the class hierarchy.
    try
    {
        this.clazz  = null;
        this.member = null;
        clazz.hierarchyAccept(false, false, false, true,
            new NamedFieldVisitor(name, descriptor,
            new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE, this)));
    }
    catch (MemberFoundException ex)
    {
        // We've found a shadowing field.
        return true;
    }

    return false;
}
 

/**
 * Finds the class member with the given name and descriptor in the given
 * class or its hierarchy.
 */
public Member findMember(Clazz   referencingClass,
                         Clazz   clazz,
                         String  name,
                         String  descriptor,
                         boolean isField)
{
    // Organize a search in the hierarchy of superclasses and interfaces.
    // The class member may be in a different class, if the code was
    // compiled with "-target 1.2" or higher (the default in JDK 1.4).
    try
    {
        this.clazz  = null;
        this.member = null;
        clazz.hierarchyAccept(true, true, true, false, isField ?
            (ClassVisitor)new NamedFieldVisitor(name, descriptor,
                          new MemberClassAccessFilter(referencingClass, this)) :
            (ClassVisitor)new NamedMethodVisitor(name, descriptor,
                          new MemberClassAccessFilter(referencingClass, this)));
    }
    catch (MemberFoundException ex)
    {
        // We've found the member we were looking for.
    }

    return member;
}
 

public void visitAnyClass(Clazz clazz)
{
    // Collect all non-private members in this class hierarchy.
    clazz.hierarchyAccept(true, true, true, false,
        new AllMethodVisitor(
        new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE,
        this)));

    // Clean up for the next class hierarchy.
    memberMap.clear();
}
 

/**
 * Returns the set of superclasses and interfaces that are initialized.
 */
private Set initializedSuperClasses(Clazz clazz)
{
    Set set = new HashSet();

    // Visit all superclasses and interfaces, collecting the ones that have
    // static initializers.
    clazz.hierarchyAccept(true, true, true, false,
                          new StaticInitializerContainingClassFilter(
                          new ClassCollector(set)));

    return set;
}
 

/**
 * Returns the set of superclasses and interfaces that are initialized.
 */
private Set initializedSuperClasses(Clazz clazz)
{
    Set set = new HashSet();

    // Visit all superclasses and interfaces, collecting the ones that have
    // static initializers.
    clazz.hierarchyAccept(true, true, true, false,
                          new StaticInitializerContainingClassFilter(
                          new ClassCollector(set)));

    return set;
}
 

/**
 * Returns the set of superclasses and interfaces that are used in
 * 'instanceof' tests.
 */
private Set instanceofedSuperClasses(Clazz clazz)
{
    Set set = new HashSet();

    // Visit all superclasses and interfaces, collecting the ones that are
    // used in an 'instanceof' test.
    clazz.hierarchyAccept(true, true, true, false,
                          new InstanceofClassFilter(
                          new ClassCollector(set)));

    return set;
}
 

/**
 * Returns the set of superclasses that are caught as exceptions.
 */
private Set caughtSuperClasses(Clazz clazz)
{
    Set set = new HashSet();

    // Visit all superclasses, collecting the ones that are caught.
    clazz.hierarchyAccept(true, true, false, false,
                          new CaughtClassFilter(
                          new ClassCollector(set)));

    return set;
}
 

/**
 * Returns whether the given class or its subclasses shadow any methods in
 * the given target class.
 */
private boolean shadowsAnyMethods(Clazz clazz, Clazz targetClass)
{
    MemberCounter counter = new MemberCounter();

    // Visit all private methods, counting the ones that are shadowing
    // non-private methods in the class hierarchy of the target class.
    clazz.hierarchyAccept(true, false, false, true,
                          new AllMethodVisitor(
                          new MemberAccessFilter(ClassConstants.INTERNAL_ACC_PRIVATE, 0,
                          new MemberNameFilter(new NotMatcher(new FixedStringMatcher(ClassConstants.INTERNAL_METHOD_NAME_INIT)),
                          new SimilarMemberVisitor(targetClass, true, true, true, false,
                          new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE,
                          counter))))));

    // Visit all static methods, counting the ones that are shadowing
    // non-private methods in the class hierarchy of the target class.
    clazz.hierarchyAccept(true, false, false, true,
                          new AllMethodVisitor(
                          new MemberAccessFilter(ClassConstants.INTERNAL_ACC_STATIC, 0,
                          new MemberNameFilter(new NotMatcher(new FixedStringMatcher(ClassConstants.INTERNAL_METHOD_NAME_CLINIT)),
                          new SimilarMemberVisitor(targetClass, true, true, true, false,
                          new MemberAccessFilter(0, ClassConstants.INTERNAL_ACC_PRIVATE,
                          counter))))));

    return counter.getCount() > 0;
}
 

/**
 * Returns the set of superclasses and interfaces that are initialized.
 */
private Set initializedSuperClasses(Clazz clazz)
{
    Set set = new HashSet();

    // Visit all superclasses and interfaces, collecting the ones that have
    // static initializers.
    clazz.hierarchyAccept(true, true, true, false,
                          new StaticInitializerContainingClassFilter(
                          new ClassCollector(set)));

    return set;
}