util/stream/FindOps.java

37  * Factory for instances of a short-circuiting {@code TerminalOp} that searches
50      * Constructs a {@code TerminalOp} for streams of objects.
53      * @param mustFindFirst whether the {@code TerminalOp} must produce the
55      * @return a {@code TerminalOp} implementing the find operation
58     public static <T> TerminalOp<T, Optional<T>> makeRef(boolean mustFindFirst) {
59         return (TerminalOp<T, Optional<T>>)
64      * Constructs a {@code TerminalOp} for streams of ints.
66      * @param mustFindFirst whether the {@code TerminalOp} must produce the
68      * @return a {@code TerminalOp} implementing the find operation
70     public static TerminalOp<Integer, OptionalInt> makeInt(boolean mustFindFirst) {
75      * Constructs a {@code TerminalOp} for streams of longs.
77      * @param mustFindFirst whether the {@code TerminalOp} must produce the
79      * @return a {@code TerminalOp} implementing the find operation
81     public static TerminalOp<Long, OptionalLong> makeLong(boolean mustFindFirst) {
88      * @param mustFindFirst whether the {@code TerminalOp} must produce the
90      * @return a {@code TerminalOp} implementing the find operation
92     public static TerminalOp<Double, OptionalDouble> makeDouble(boolean mustFindFirst) {
97      * A short-circuiting {@code TerminalOp} that searches for an element in a
106     private static final class FindOp<T, O> implements TerminalOp<T, O> {
197             static final TerminalOp<?, ?> OP_FIND_FIRST = new FindOp<>(true,
201             static final TerminalOp<?, ?> OP_FIND_ANY = new FindOp<>(false,
220             static final TerminalOp<Integer, OptionalInt> OP_FIND_FIRST = new FindOp<>(true,
223             static final TerminalOp<Integer, OptionalInt> OP_FIND_ANY = new FindOp<>(false,
242             static final TerminalOp<Long, OptionalLong> OP_FIND_FIRST = new FindOp<>(true,
245             static final TerminalOp<Long, OptionalLong> OP_FIND_ANY = new FindOp<>(false,
264             static final TerminalOp<Double, OptionalDouble> OP_FIND_FIRST = new FindOp<>(true,
267             static final TerminalOp<Double, OptionalDouble> OP_FIND_ANY = new FindOp<>(false,