package e4;

import java.io.Serializable;
import java.util.AbstractCollection;
import java.util.Collection;
import java.util.function.Predicate;

/* loaded from: classes2.dex */
public abstract class m extends AbstractCollection implements Serializable {

    /* renamed from: a, reason: collision with root package name */
    private static final Object[] f9310a = new Object[0];

    m() {
    }

    public abstract o a();

    @Override // java.util.AbstractCollection, java.util.Collection
    public final boolean add(Object obj) {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final boolean addAll(Collection collection) {
        throw new UnsupportedOperationException();
    }

    abstract int b(Object[] objArr, int i10);

    abstract boolean c();

    @Override // java.util.AbstractCollection, java.util.Collection
    public final void clear() {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final boolean remove(Object obj) {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final boolean removeAll(Collection collection) {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.Collection
    public final boolean removeIf(Predicate predicate) {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final boolean retainAll(Collection collection) {
        throw new UnsupportedOperationException();
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final Object[] toArray() {
        int size = size();
        if (size == 0) {
            return f9310a;
        }
        Object[] objArr = new Object[size];
        b(objArr, 0);
        return objArr;
    }

    @Override // java.util.AbstractCollection, java.util.Collection
    public final Object[] toArray(Object[] objArr) {
        d4.c.g(objArr);
        int size = size();
        if (objArr.length < size) {
            objArr = r.d(objArr, size);
        } else if (objArr.length > size) {
            objArr[size] = null;
        }
        b(objArr, 0);
        return objArr;
    }
}