org/openjdk/testlib/java/util/stream/StreamOpFlagTestHelper.java

/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.openjdk.testlib.java.util.stream;

import java.util.EnumSet;
import java.util.stream.BaseStream;
import java.util.stream.StreamOpFlag;
import java.util.stream.Stream;

public class StreamOpFlagTestHelper {

    /** EnumSet containing stream flags */
    private static final EnumSet<StreamOpFlag> allStreamFlags;

    static {
        allStreamFlags = EnumSet.allOf(StreamOpFlag.class);
        for (StreamOpFlag f : EnumSet.allOf(StreamOpFlag.class))
            if (!f.isStreamFlag())
                allStreamFlags.remove(f);
    }


    static EnumSet<StreamOpFlag> allStreamFlags() {
        // EnumSet is mutable
        return allStreamFlags.clone();
    }

    public static boolean isStreamOrdered(Stream<?> s) {
        return StreamOpFlag.ORDERED.isKnown(OpTestCase.getStreamFlags(s));
    }
}