--- a/jdk/test/java/lang/invoke/T8139885.java Mon Mar 07 13:28:51 2016 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1111 +0,0 @@
-/*
- * Copyright (c) 2015, 2016, 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. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/* @test
- * @bug 8139885
- * @bug 8143798
- * @bug 8150825
- * @run testng/othervm -ea -esa test.java.lang.invoke.T8139885
- */
-
-package test.java.lang.invoke;
-
-import java.io.StringWriter;
-import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodHandles;
-import java.lang.invoke.MethodHandles.Lookup;
-import java.lang.invoke.MethodType;
-import java.lang.invoke.WrongMethodTypeException;
-import java.util.*;
-
-import static java.lang.invoke.MethodType.methodType;
-
-import static org.testng.AssertJUnit.*;
-
-import org.testng.annotations.*;
-
-/**
- * Example-scale and negative tests for JEP 274 extensions.
- */
-public class T8139885 {
-
- static final Lookup LOOKUP = MethodHandles.lookup();
-
- //
- // Tests.
- //
-
- @Test
- public static void testLoopFac() throws Throwable {
- MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc};
- MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
- MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause);
- assertEquals(Fac.MT_fac, loop.type());
- assertEquals(120, loop.invoke(5));
- }
-
- @Test
- public static void testLoopFacNullInit() throws Throwable {
- // null initializer for counter, should initialize to 0
- MethodHandle[] counterClause = new MethodHandle[]{null, Fac.MH_inc};
- MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
- MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause);
- assertEquals(Fac.MT_fac, loop.type());
- assertEquals(120, loop.invoke(5));
- }
-
- @Test
- public static void testLoopVoid1() throws Throwable {
- // construct a post-checked loop that only does one iteration and has a void body and void local state
- MethodHandle loop = MethodHandles.loop(new MethodHandle[]{Empty.MH_f, Empty.MH_f, Empty.MH_pred, null});
- assertEquals(MethodType.methodType(void.class), loop.type());
- loop.invoke();
- }
-
- @Test
- public static void testLoopVoid2() throws Throwable {
- // construct a post-checked loop that only does one iteration and has a void body and void local state,
- // initialized implicitly from the step type
- MethodHandle loop = MethodHandles.loop(new MethodHandle[]{null, Empty.MH_f, Empty.MH_pred, null});
- assertEquals(MethodType.methodType(void.class), loop.type());
- loop.invoke();
- }
-
- @Test
- public static void testLoopFacWithVoidState() throws Throwable {
- // like testLoopFac, but with additional void state that outputs a dot
- MethodHandle[] counterClause = new MethodHandle[]{Fac.MH_zero, Fac.MH_inc};
- MethodHandle[] accumulatorClause = new MethodHandle[]{Fac.MH_one, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin};
- MethodHandle[] dotClause = new MethodHandle[]{null, Fac.MH_dot};
- MethodHandle loop = MethodHandles.loop(counterClause, accumulatorClause, dotClause);
- assertEquals(Fac.MT_fac, loop.type());
- assertEquals(120, loop.invoke(5));
- }
-
- @Test
- public static void testLoopNegative() throws Throwable {
- MethodHandle mh_loop =
- LOOKUP.findStatic(MethodHandles.class, "loop", methodType(MethodHandle.class, MethodHandle[][].class));
- MethodHandle i0 = MethodHandles.constant(int.class, 0);
- MethodHandle ii = MethodHandles.dropArguments(i0, 0, int.class, int.class);
- MethodHandle id = MethodHandles.dropArguments(i0, 0, int.class, double.class);
- MethodHandle i3 = MethodHandles.dropArguments(i0, 0, int.class, int.class, int.class);
- List<MethodHandle> inits = Arrays.asList(ii, id, i3);
- List<Class<?>> ints = Arrays.asList(int.class, int.class, int.class);
- List<MethodHandle> finis = Arrays.asList(Fac.MH_fin, Fac.MH_inc, Counted.MH_step);
- List<MethodHandle> preds1 = Arrays.asList(null, null, null);
- List<MethodHandle> preds2 = Arrays.asList(null, Fac.MH_fin, null);
- MethodHandle eek = MethodHandles.dropArguments(i0, 0, int.class, int.class, double.class);
- List<MethodHandle> nesteps = Arrays.asList(Fac.MH_inc, eek, Fac.MH_dot);
- List<MethodHandle> nepreds = Arrays.asList(null, Fac.MH_pred, null);
- List<MethodHandle> nefinis = Arrays.asList(null, Fac.MH_fin, null);
- MethodHandle[][][] cases = {
- null,
- {},
- {{null, Fac.MH_inc}, {Fac.MH_one, null, Fac.MH_mult, Fac.MH_pred, Fac.MH_fin}},
- {{null, Fac.MH_inc}, null},
- {{Fac.MH_zero, Fac.MH_dot}},
- {{ii}, {id}, {i3}},
- {{null, Fac.MH_inc, null, Fac.MH_fin}, {null, Fac.MH_inc, null, Fac.MH_inc},
- {null, Counted.MH_start, null, Counted.MH_step}},
- {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, null, Fac.MH_fin}, {null, Fac.MH_dot}},
- {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, Fac.MH_mult, Fac.MH_fin, Fac.MH_fin}, {null, Fac.MH_dot}},
- {{Fac.MH_zero, Fac.MH_inc}, {Fac.MH_one, eek, Fac.MH_pred, Fac.MH_fin}, {null, Fac.MH_dot}}
- };
- String[] messages = {
- "null or no clauses passed",
- "null or no clauses passed",
- "All loop clauses must be represented as MethodHandle arrays with at most 4 elements.",
- "null clauses are not allowed",
- "clause 0: init and step return types must match: int != void",
- "found non-effectively identical init parameter type lists: " + inits + " (common suffix: " + ints + ")",
- "found non-identical finalizer return types: " + finis + " (return type: int)",
- "no predicate found: " + preds1,
- "predicates must have boolean return type: " + preds2,
- "found non-effectively identical parameter type lists:\nstep: " + nesteps + "\npred: " + nepreds +
- "\nfini: " + nefinis + " (common parameter sequence: " + ints + ")"
- };
- for (int i = 0; i < cases.length; ++i) {
- boolean caught = false;
- try {
- mh_loop.invokeWithArguments(cases[i]);
- } catch (IllegalArgumentException iae) {
- assertEquals(messages[i], iae.getMessage());
- caught = true;
- }
- assertTrue(caught);
- }
- }
-
- @Test
- public static void testWhileLoop() throws Throwable {
- // int i = 0; while (i < limit) { ++i; } return i; => limit
- MethodHandle loop = MethodHandles.whileLoop(While.MH_zero, While.MH_pred, While.MH_step);
- assertEquals(While.MT_while, loop.type());
- assertEquals(23, loop.invoke(23));
- }
-
- @Test
- public static void testWhileLoopNoIteration() throws Throwable {
- // a while loop that never executes its body because the predicate evaluates to false immediately
- MethodHandle loop = MethodHandles.whileLoop(While.MH_initString, While.MH_predString, While.MH_stepString);
- assertEquals(While.MT_string, loop.type());
- assertEquals("a", loop.invoke());
- }
-
- @Test
- public static void testDoWhileLoop() throws Throwable {
- // int i = 0; do { ++i; } while (i < limit); return i; => limit
- MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zero, While.MH_step, While.MH_pred);
- assertEquals(While.MT_while, loop.type());
- assertEquals(23, loop.invoke(23));
- }
-
- @Test
- public static void testWhileZip() throws Throwable {
- MethodHandle loop = MethodHandles.doWhileLoop(While.MH_zipInitZip, While.MH_zipStep, While.MH_zipPred);
- assertEquals(While.MT_zip, loop.type());
- List<String> a = Arrays.asList("a", "b", "c", "d");
- List<String> b = Arrays.asList("e", "f", "g", "h");
- List<String> zipped = Arrays.asList("a", "e", "b", "f", "c", "g", "d", "h");
- assertEquals(zipped, (List<String>) loop.invoke(a.iterator(), b.iterator()));
- }
-
- @Test
- public static void testCountedLoop() throws Throwable {
- // String s = "Lambdaman!"; for (int i = 0; i < 13; ++i) { s = "na " + s; } return s; => a variation on a well known theme
- MethodHandle fit13 = MethodHandles.constant(int.class, 13);
- MethodHandle loop = MethodHandles.countedLoop(fit13, Counted.MH_start, Counted.MH_step);
- assertEquals(Counted.MT_counted, loop.type());
- assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!"));
- }
-
- @Test
- public static void testCountedArrayLoop() throws Throwable {
- // int[] a = new int[]{0}; for (int i = 0; i < 13; ++i) { ++a[0]; } => a[0] == 13
- MethodHandle fit13 = MethodHandles.dropArguments(MethodHandles.constant(int.class, 13), 0, int[].class);
- MethodHandle loop = MethodHandles.countedLoop(fit13, null, Counted.MH_stepUpdateArray);
- assertEquals(Counted.MT_arrayCounted, loop.type());
- int[] a = new int[]{0};
- loop.invoke(a);
- assertEquals(13, a[0]);
- }
-
- @Test
- public static void testCountedPrintingLoop() throws Throwable {
- MethodHandle fit5 = MethodHandles.constant(int.class, 5);
- MethodHandle loop = MethodHandles.countedLoop(fit5, null, Counted.MH_printHello);
- assertEquals(Counted.MT_countedPrinting, loop.type());
- loop.invoke();
- }
-
- @Test
- public static void testCountedRangeLoop() throws Throwable {
- // String s = "Lambdaman!"; for (int i = -5; i < 8; ++i) { s = "na " + s; } return s; => a well known theme
- MethodHandle fitm5 = MethodHandles.dropArguments(Counted.MH_m5, 0, String.class);
- MethodHandle fit8 = MethodHandles.dropArguments(Counted.MH_8, 0, String.class);
- MethodHandle loop = MethodHandles.countedLoop(fitm5, fit8, Counted.MH_start, Counted.MH_step);
- assertEquals(Counted.MT_counted, loop.type());
- assertEquals("na na na na na na na na na na na na na Lambdaman!", loop.invoke("Lambdaman!"));
- }
-
- @Test
- public static void testIterateSum() throws Throwable {
- // Integer[] a = new Integer[]{1,2,3,4,5,6}; int sum = 0; for (int e : a) { sum += e; } return sum; => 21
- MethodHandle loop = MethodHandles.iteratedLoop(Iterate.MH_sumIterator, Iterate.MH_sumInit, Iterate.MH_sumStep);
- assertEquals(Iterate.MT_sum, loop.type());
- assertEquals(21, loop.invoke(new Integer[]{1, 2, 3, 4, 5, 6}));
- }
-
- @Test
- public static void testIterateReverse() throws Throwable {
- MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_reverseInit, Iterate.MH_reverseStep);
- assertEquals(Iterate.MT_reverse, loop.type());
- List<String> list = Arrays.asList("a", "b", "c", "d", "e");
- List<String> reversedList = Arrays.asList("e", "d", "c", "b", "a");
- assertEquals(reversedList, (List<String>) loop.invoke(list));
- }
-
- @Test
- public static void testIterateLength() throws Throwable {
- MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_lengthInit, Iterate.MH_lengthStep);
- assertEquals(Iterate.MT_length, loop.type());
- List<Double> list = Arrays.asList(23.0, 148.0, 42.0);
- assertEquals(list.size(), (int) loop.invoke(list));
- }
-
- @Test
- public static void testIterateMap() throws Throwable {
- MethodHandle loop = MethodHandles.iteratedLoop(null, Iterate.MH_mapInit, Iterate.MH_mapStep);
- assertEquals(Iterate.MT_map, loop.type());
- List<String> list = Arrays.asList("Hello", "world", "!");
- List<String> upList = Arrays.asList("HELLO", "WORLD", "!");
- assertEquals(upList, (List<String>) loop.invoke(list));
- }
-
- @Test
- public static void testIteratePrint() throws Throwable {
- MethodHandle loop = MethodHandles.iteratedLoop(null, null, Iterate.MH_printStep);
- assertEquals(Iterate.MT_print, loop.type());
- loop.invoke(Arrays.asList("hello", "world"));
- }
-
- @Test
- public static void testIterateNullBody() {
- boolean caught = false;
- try {
- MethodHandles.iteratedLoop(MethodHandles.identity(int.class), MethodHandles.identity(int.class), null);
- } catch (IllegalArgumentException iae) {
- assertEquals("iterated loop body must not be null", iae.getMessage());
- caught = true;
- }
- assertTrue(caught);
- }
-
- @Test
- public static void testTryFinally() throws Throwable {
- MethodHandle hello = MethodHandles.tryFinally(TryFinally.MH_greet, TryFinally.MH_exclaim);
- assertEquals(TryFinally.MT_hello, hello.type());
- assertEquals("Hello, world!", hello.invoke("world"));
- }
-
- @Test
- public static void testTryFinallyVoid() throws Throwable {
- MethodHandle tfVoid = MethodHandles.tryFinally(TryFinally.MH_print, TryFinally.MH_printMore);
- assertEquals(TryFinally.MT_printHello, tfVoid.type());
- tfVoid.invoke("world");
- }
-
- @Test
- public static void testTryFinallySublist() throws Throwable {
- MethodHandle helloMore = MethodHandles.tryFinally(TryFinally.MH_greetMore, TryFinally.MH_exclaimMore);
- assertEquals(TryFinally.MT_moreHello, helloMore.type());
- assertEquals("Hello, world and universe (but world first)!", helloMore.invoke("world", "universe"));
- }
-
- @Test
- public static void testTryFinallyNegative() {
- MethodHandle intid = MethodHandles.identity(int.class);
- MethodHandle intco = MethodHandles.constant(int.class, 0);
- MethodHandle errTarget = MethodHandles.dropArguments(intco, 0, int.class, double.class, String.class, int.class);
- MethodHandle errCleanup = MethodHandles.dropArguments(MethodHandles.constant(int.class, 0), 0, Throwable.class,
- int.class, double.class, Object.class);
- MethodHandle[][] cases = {
- {intid, MethodHandles.identity(double.class)},
- {intid, MethodHandles.dropArguments(intid, 0, String.class)},
- {intid, MethodHandles.dropArguments(intid, 0, Throwable.class, double.class)},
- {errTarget, errCleanup},
- {TryFinally.MH_voidTarget, TryFinally.MH_voidCleanup}
- };
- String[] messages = {
- "target and return types must match: double != int",
- "cleanup first argument and Throwable must match: (String,int)int != class java.lang.Throwable",
- "cleanup second argument and target return type must match: (Throwable,double,int)int != int",
- "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " +
- errCleanup.type() + " != " + errTarget.type(),
- "cleanup parameters after (Throwable,result) and target parameter list prefix must match: " +
- TryFinally.MH_voidCleanup.type() + " != " + TryFinally.MH_voidTarget.type()
- };
- for (int i = 0; i < cases.length; ++i) {
- boolean caught = false;
- try {
- MethodHandles.tryFinally(cases[i][0], cases[i][1]);
- } catch (IllegalArgumentException iae) {
- assertEquals(messages[i], iae.getMessage());
- caught = true;
- }
- assertTrue(caught);
- }
- }
-
- @Test
- public static void testFold0a() throws Throwable {
- // equivalence to foldArguments(MethodHandle,MethodHandle)
- MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 0, Fold.MH_adder);
- assertEquals(Fold.MT_folded1, fold.type());
- assertEquals(720, (int) fold.invoke(3, 4, 5));
- }
-
- @Test
- public static void testFold1a() throws Throwable {
- // test foldArguments for folding position 1
- MethodHandle fold = MethodHandles.foldArguments(Fold.MH_multer, 1, Fold.MH_adder1);
- assertEquals(Fold.MT_folded1, fold.type());
- assertEquals(540, (int) fold.invoke(3, 4, 5));
- }
-
- @Test
- public static void testFold0b() throws Throwable {
- // test foldArguments equivalence with multiple types
- MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 0, Fold.MH_comb);
- assertEquals(Fold.MT_folded2, fold.type());
- assertEquals(23, (int) fold.invoke("true", true, 23));
- }
-
- @Test
- public static void testFold1b() throws Throwable {
- // test folgArguments for folding position 1, with multiple types
- MethodHandle fold = MethodHandles.foldArguments(Fold.MH_str, 1, Fold.MH_comb2);
- assertEquals(Fold.MT_folded3, fold.type());
- assertEquals(1, (int) fold.invoke(true, true, 1));
- assertEquals(-1, (int) fold.invoke(true, false, -1));
- }
-
- @Test
- public static void testFoldArgumentsExample() throws Throwable {
- // test the JavaDoc foldArguments-with-pos example
- StringWriter swr = new StringWriter();
- MethodHandle trace = LOOKUP.findVirtual(StringWriter.class, "write", methodType(void.class, String.class)).bindTo(swr);
- MethodHandle cat = LOOKUP.findVirtual(String.class, "concat", methodType(String.class, String.class));
- assertEquals("boojum", (String) cat.invokeExact("boo", "jum"));
- MethodHandle catTrace = MethodHandles.foldArguments(cat, 1, trace);
- assertEquals("boojum", (String) catTrace.invokeExact("boo", "jum"));
- assertEquals("jum", swr.toString());
- }
-
- @Test
- public static void testAsSpreader() throws Throwable {
- MethodHandle spreader = SpreadCollect.MH_forSpreading.asSpreader(1, int[].class, 3);
- assertEquals(SpreadCollect.MT_spreader, spreader.type());
- assertEquals("A456B", (String) spreader.invoke("A", new int[]{4, 5, 6}, "B"));
- }
-
- @Test
- public static void testAsSpreaderExample() throws Throwable {
- // test the JavaDoc asSpreader-with-pos example
- MethodHandle compare = LOOKUP.findStatic(Objects.class, "compare", methodType(int.class, Object.class, Object.class, Comparator.class));
- MethodHandle compare2FromArray = compare.asSpreader(0, Object[].class, 2);
- Object[] ints = new Object[]{3, 9, 7, 7};
- Comparator<Integer> cmp = (a, b) -> a - b;
- assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 0, 2), cmp) < 0);
- assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 1, 3), cmp) > 0);
- assertTrue((int) compare2FromArray.invoke(Arrays.copyOfRange(ints, 2, 4), cmp) == 0);
- }
-
- @Test
- public static void testAsSpreaderIllegalPos() throws Throwable {
- int[] illegalPos = {-7, 3, 19};
- int caught = 0;
- for (int p : illegalPos) {
- try {
- SpreadCollect.MH_forSpreading.asSpreader(p, Object[].class, 3);
- } catch (IllegalArgumentException iae) {
- assertEquals("bad spread position", iae.getMessage());
- ++caught;
- }
- }
- assertEquals(illegalPos.length, caught);
- }
-
- @Test
- public static void testAsSpreaderIllegalMethodType() throws Throwable {
- MethodHandle h = MethodHandles.dropArguments(MethodHandles.constant(String.class, ""), 0, int.class, int.class);
- boolean caught = false;
- try {
- MethodHandle s = h.asSpreader(String[].class, 1);
- } catch (WrongMethodTypeException wmte) {
- caught = true;
- }
- assertTrue(caught);
- }
-
- @Test
- public static void testAsCollector() throws Throwable {
- MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1);
- assertEquals(SpreadCollect.MT_collector1, collector.type());
- assertEquals("A4B", (String) collector.invoke("A", 4, "B"));
- collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2);
- assertEquals(SpreadCollect.MT_collector2, collector.type());
- assertEquals("A45B", (String) collector.invoke("A", 4, 5, "B"));
- collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3);
- assertEquals(SpreadCollect.MT_collector3, collector.type());
- assertEquals("A456B", (String) collector.invoke("A", 4, 5, 6, "B"));
- }
-
- @Test
- public static void testAsCollectorInvokeWithArguments() throws Throwable {
- MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 1);
- assertEquals(SpreadCollect.MT_collector1, collector.type());
- assertEquals("A4B", (String) collector.invokeWithArguments("A", 4, "B"));
- collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 2);
- assertEquals(SpreadCollect.MT_collector2, collector.type());
- assertEquals("A45B", (String) collector.invokeWithArguments("A", 4, 5, "B"));
- collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 3);
- assertEquals(SpreadCollect.MT_collector3, collector.type());
- assertEquals("A456B", (String) collector.invokeWithArguments("A", 4, 5, 6, "B"));
- }
-
- @Test
- public static void testAsCollectorLeading() throws Throwable {
- MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1);
- assertEquals(SpreadCollect.MT_collectorLeading1, collector.type());
- assertEquals("7Q", (String) collector.invoke(7, "Q"));
- collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2);
- assertEquals(SpreadCollect.MT_collectorLeading2, collector.type());
- assertEquals("78Q", (String) collector.invoke(7, 8, "Q"));
- collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3);
- assertEquals(SpreadCollect.MT_collectorLeading3, collector.type());
- assertEquals("789Q", (String) collector.invoke(7, 8, 9, "Q"));
- }
-
- @Test
- public static void testAsCollectorLeadingInvokeWithArguments() throws Throwable {
- MethodHandle collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 1);
- assertEquals(SpreadCollect.MT_collectorLeading1, collector.type());
- assertEquals("7Q", (String) collector.invokeWithArguments(7, "Q"));
- collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 2);
- assertEquals(SpreadCollect.MT_collectorLeading2, collector.type());
- assertEquals("78Q", (String) collector.invokeWithArguments(7, 8, "Q"));
- collector = SpreadCollect.MH_forCollectingLeading.asCollector(0, int[].class, 3);
- assertEquals(SpreadCollect.MT_collectorLeading3, collector.type());
- assertEquals("789Q", (String) collector.invokeWithArguments(7, 8, 9, "Q"));
- }
-
- @Test
- public static void testAsCollectorNone() throws Throwable {
- MethodHandle collector = SpreadCollect.MH_forCollecting.asCollector(1, int[].class, 0);
- assertEquals(SpreadCollect.MT_collector0, collector.type());
- assertEquals("AB", (String) collector.invoke("A", "B"));
- }
-
- @Test
- public static void testAsCollectorIllegalPos() throws Throwable {
- int[] illegalPos = {-1, 17};
- int caught = 0;
- for (int p : illegalPos) {
- try {
- SpreadCollect.MH_forCollecting.asCollector(p, int[].class, 0);
- } catch (IllegalArgumentException iae) {
- assertEquals("bad collect position", iae.getMessage());
- ++caught;
- }
- }
- assertEquals(illegalPos.length, caught);
- }
-
- @Test
- public static void testAsCollectorExample() throws Throwable {
- // test the JavaDoc asCollector-with-pos example
- StringWriter swr = new StringWriter();
- MethodHandle swWrite = LOOKUP.
- findVirtual(StringWriter.class, "write", methodType(void.class, char[].class, int.class, int.class)).
- bindTo(swr);
- MethodHandle swWrite4 = swWrite.asCollector(0, char[].class, 4);
- swWrite4.invoke('A', 'B', 'C', 'D', 1, 2);
- assertEquals("BC", swr.toString());
- swWrite4.invoke('P', 'Q', 'R', 'S', 0, 4);
- assertEquals("BCPQRS", swr.toString());
- swWrite4.invoke('W', 'X', 'Y', 'Z', 3, 1);
- assertEquals("BCPQRSZ", swr.toString());
- }
-
- @Test
- public static void testFindSpecial() throws Throwable {
- FindSpecial.C c = new FindSpecial.C();
- assertEquals("I1.m", c.m());
- MethodType t = MethodType.methodType(String.class);
- MethodHandle ci1m = LOOKUP.findSpecial(FindSpecial.I1.class, "m", t, FindSpecial.C.class);
- assertEquals("I1.m", (String) ci1m.invoke(c));
- }
-
- @Test
- public static void testFindSpecialAbstract() throws Throwable {
- FindSpecial.C c = new FindSpecial.C();
- assertEquals("q", c.q());
- MethodType t = MethodType.methodType(String.class);
- boolean caught = false;
- try {
- MethodHandle ci3q = LOOKUP.findSpecial(FindSpecial.I3.class, "q", t, FindSpecial.C.class);
- } catch (Throwable thrown) {
- if (!(thrown instanceof IllegalAccessException) || !FindSpecial.ABSTRACT_ERROR.equals(thrown.getMessage())) {
- throw new AssertionError(thrown.getMessage(), thrown);
- }
- caught = true;
- }
- assertTrue(caught);
- }
-
- @Test
- public static void testFindClassCNFE() throws Throwable {
- boolean caught = false;
- try {
- LOOKUP.findClass("does.not.Exist");
- } catch (ClassNotFoundException cnfe) {
- caught = true;
- }
- assertTrue(caught);
- }
-
- //
- // Methods used to assemble tests.
- //
-
- static class Empty {
-
- static void f() { }
-
- static boolean pred() {
- return false;
- }
-
- static final Class<Empty> EMPTY = Empty.class;
-
- static final MethodType MT_f = methodType(void.class);
- static final MethodType MT_pred = methodType(boolean.class);
-
- static final MethodHandle MH_f;
- static final MethodHandle MH_pred;
-
- static {
- try {
- MH_f = LOOKUP.findStatic(EMPTY, "f", MT_f);
- MH_pred = LOOKUP.findStatic(EMPTY, "pred", MT_pred);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
- }
-
- static class Fac {
-
- static int zero(int k) {
- return 0;
- }
-
- static int one(int k) {
- return 1;
- }
-
- static boolean pred(int i, int acc, int k) {
- return i < k;
- }
-
- static int inc(int i, int acc, int k) {
- return i + 1;
- }
-
- static int mult(int i, int acc, int k) {
- return i * acc;
- }
-
- static void dot(int i, int acc, int k) {
- System.out.print('.');
- }
-
- static int fin(int i, int acc, int k) {
- return acc;
- }
-
- static final Class<Fac> FAC = Fac.class;
-
- static final MethodType MT_init = methodType(int.class, int.class);
- static final MethodType MT_fn = methodType(int.class, int.class, int.class, int.class);
- static final MethodType MT_dot = methodType(void.class, int.class, int.class, int.class);
- static final MethodType MT_pred = methodType(boolean.class, int.class, int.class, int.class);
-
- static final MethodHandle MH_zero;
- static final MethodHandle MH_one;
- static final MethodHandle MH_pred;
- static final MethodHandle MH_inc;
- static final MethodHandle MH_mult;
- static final MethodHandle MH_dot;
- static final MethodHandle MH_fin;
-
- static final MethodType MT_fac = methodType(int.class, int.class);
-
- static {
- try {
- MH_zero = LOOKUP.findStatic(FAC, "zero", MT_init);
- MH_one = LOOKUP.findStatic(FAC, "one", MT_init);
- MH_pred = LOOKUP.findStatic(FAC, "pred", MT_pred);
- MH_inc = LOOKUP.findStatic(FAC, "inc", MT_fn);
- MH_mult = LOOKUP.findStatic(FAC, "mult", MT_fn);
- MH_dot = LOOKUP.findStatic(FAC, "dot", MT_dot);
- MH_fin = LOOKUP.findStatic(FAC, "fin", MT_fn);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class While {
-
- static int zero(int limit) {
- return 0;
- }
-
- static boolean pred(int i, int limit) {
- return i < limit;
- }
-
- static int step(int i, int limit) {
- return i + 1;
- }
-
- static String initString() {
- return "a";
- }
-
- static boolean predString(String s) {
- return s.length() != 1;
- }
-
- static String stepString(String s) {
- return s + "a";
- }
-
- static List<String> zipInitZip(Iterator<String> a, Iterator<String> b) {
- return new ArrayList<>();
- }
-
- static boolean zipPred(List<String> zip, Iterator<String> a, Iterator<String> b) {
- return a.hasNext() && b.hasNext();
- }
-
- static List<String> zipStep(List<String> zip, Iterator<String> a, Iterator<String> b) {
- zip.add(a.next());
- zip.add(b.next());
- return zip;
- }
-
- static final Class<While> WHILE = While.class;
-
- static final MethodType MT_zero = methodType(int.class, int.class);
- static final MethodType MT_pred = methodType(boolean.class, int.class, int.class);
- static final MethodType MT_fn = methodType(int.class, int.class, int.class);
- static final MethodType MT_initString = methodType(String.class);
- static final MethodType MT_predString = methodType(boolean.class, String.class);
- static final MethodType MT_stepString = methodType(String.class, String.class);
- static final MethodType MT_zipInitZip = methodType(List.class, Iterator.class, Iterator.class);
- static final MethodType MT_zipPred = methodType(boolean.class, List.class, Iterator.class, Iterator.class);
- static final MethodType MT_zipStep = methodType(List.class, List.class, Iterator.class, Iterator.class);
-
- static final MethodHandle MH_zero;
- static final MethodHandle MH_pred;
- static final MethodHandle MH_step;
- static final MethodHandle MH_initString;
- static final MethodHandle MH_predString;
- static final MethodHandle MH_stepString;
- static final MethodHandle MH_zipInitZip;
- static final MethodHandle MH_zipPred;
- static final MethodHandle MH_zipStep;
-
- static final MethodType MT_while = methodType(int.class, int.class);
- static final MethodType MT_string = methodType(String.class);
- static final MethodType MT_zip = methodType(List.class, Iterator.class, Iterator.class);
-
- static {
- try {
- MH_zero = LOOKUP.findStatic(WHILE, "zero", MT_zero);
- MH_pred = LOOKUP.findStatic(WHILE, "pred", MT_pred);
- MH_step = LOOKUP.findStatic(WHILE, "step", MT_fn);
- MH_initString = LOOKUP.findStatic(WHILE, "initString", MT_initString);
- MH_predString = LOOKUP.findStatic(WHILE, "predString", MT_predString);
- MH_stepString = LOOKUP.findStatic(WHILE, "stepString", MT_stepString);
- MH_zipInitZip = LOOKUP.findStatic(WHILE, "zipInitZip", MT_zipInitZip);
- MH_zipPred = LOOKUP.findStatic(WHILE, "zipPred", MT_zipPred);
- MH_zipStep = LOOKUP.findStatic(WHILE, "zipStep", MT_zipStep);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class Counted {
-
- static String start(String arg) {
- return arg;
- }
-
- static String step(int counter, String v, String arg) {
- return "na " + v;
- }
-
- static void stepUpdateArray(int counter, int[] a) {
- ++a[0];
- }
-
- static void printHello(int counter) {
- System.out.print("hello");
- }
-
- static final Class<Counted> COUNTED = Counted.class;
-
- static final MethodType MT_start = methodType(String.class, String.class);
- static final MethodType MT_step = methodType(String.class, int.class, String.class, String.class);
- static final MethodType MT_stepUpdateArray = methodType(void.class, int.class, int[].class);
- static final MethodType MT_printHello = methodType(void.class, int.class);
-
- static final MethodHandle MH_13;
- static final MethodHandle MH_m5;
- static final MethodHandle MH_8;
- static final MethodHandle MH_start;
- static final MethodHandle MH_step;
- static final MethodHandle MH_stepUpdateArray;
- static final MethodHandle MH_printHello;
-
- static final MethodType MT_counted = methodType(String.class, String.class);
- static final MethodType MT_arrayCounted = methodType(void.class, int[].class);
- static final MethodType MT_countedPrinting = methodType(void.class);
-
- static {
- try {
- MH_13 = MethodHandles.constant(int.class, 13);
- MH_m5 = MethodHandles.constant(int.class, -5);
- MH_8 = MethodHandles.constant(int.class, 8);
- MH_start = LOOKUP.findStatic(COUNTED, "start", MT_start);
- MH_step = LOOKUP.findStatic(COUNTED, "step", MT_step);
- MH_stepUpdateArray = LOOKUP.findStatic(COUNTED, "stepUpdateArray", MT_stepUpdateArray);
- MH_printHello = LOOKUP.findStatic(COUNTED, "printHello", MT_printHello);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class Iterate {
-
- static Iterator<Integer> sumIterator(Integer[] a) {
- return Arrays.asList(a).iterator();
- }
-
- static int sumInit(Integer[] a) {
- return 0;
- }
-
- static int sumStep(int s, int e, Integer[] a) {
- return s + e;
- }
-
- static List<String> reverseInit(List<String> l) {
- return new ArrayList<>();
- }
-
- static List<String> reverseStep(String e, List<String> r, List<String> l) {
- r.add(0, e);
- return r;
- }
-
- static int lengthInit(List<Double> l) {
- return 0;
- }
-
- static int lengthStep(Object o, int len, List<Double> l) {
- return len + 1;
- }
-
- static List<String> mapInit(List<String> l) {
- return new ArrayList<>();
- }
-
- static List<String> mapStep(String e, List<String> r, List<String> l) {
- r.add(e.toUpperCase());
- return r;
- }
-
- static void printStep(String s, List<String> l) {
- System.out.print(s);
- }
-
- static final Class<Iterate> ITERATE = Iterate.class;
-
- static final MethodType MT_sumIterator = methodType(Iterator.class, Integer[].class);
-
- static final MethodType MT_sumInit = methodType(int.class, Integer[].class);
- static final MethodType MT_reverseInit = methodType(List.class, List.class);
- static final MethodType MT_lenghInit = methodType(int.class, List.class);
- static final MethodType MT_mapInit = methodType(List.class, List.class);
-
- static final MethodType MT_sumStep = methodType(int.class, int.class, int.class, Integer[].class);
- static final MethodType MT_reverseStep = methodType(List.class, String.class, List.class, List.class);
- static final MethodType MT_lengthStep = methodType(int.class, Object.class, int.class, List.class);
- static final MethodType MT_mapStep = methodType(List.class, String.class, List.class, List.class);
- static final MethodType MT_printStep = methodType(void.class, String.class, List.class);
-
- static final MethodHandle MH_sumIterator;
- static final MethodHandle MH_sumInit;
- static final MethodHandle MH_sumStep;
- static final MethodHandle MH_printStep;
-
- static final MethodHandle MH_reverseInit;
- static final MethodHandle MH_reverseStep;
-
- static final MethodHandle MH_lengthInit;
- static final MethodHandle MH_lengthStep;
-
- static final MethodHandle MH_mapInit;
- static final MethodHandle MH_mapStep;
-
- static final MethodType MT_sum = methodType(int.class, Integer[].class);
- static final MethodType MT_reverse = methodType(List.class, List.class);
- static final MethodType MT_length = methodType(int.class, List.class);
- static final MethodType MT_map = methodType(List.class, List.class);
- static final MethodType MT_print = methodType(void.class, List.class);
-
- static {
- try {
- MH_sumIterator = LOOKUP.findStatic(ITERATE, "sumIterator", MT_sumIterator);
- MH_sumInit = LOOKUP.findStatic(ITERATE, "sumInit", MT_sumInit);
- MH_sumStep = LOOKUP.findStatic(ITERATE, "sumStep", MT_sumStep);
- MH_reverseInit = LOOKUP.findStatic(ITERATE, "reverseInit", MT_reverseInit);
- MH_reverseStep = LOOKUP.findStatic(ITERATE, "reverseStep", MT_reverseStep);
- MH_lengthInit = LOOKUP.findStatic(ITERATE, "lengthInit", MT_lenghInit);
- MH_lengthStep = LOOKUP.findStatic(ITERATE, "lengthStep", MT_lengthStep);
- MH_mapInit = LOOKUP.findStatic(ITERATE, "mapInit", MT_mapInit);
- MH_mapStep = LOOKUP.findStatic(ITERATE, "mapStep", MT_mapStep);
- MH_printStep = LOOKUP.findStatic(ITERATE, "printStep", MT_printStep);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class TryFinally {
-
- static String greet(String whom) {
- return "Hello, " + whom;
- }
-
- static String exclaim(Throwable t, String r, String whom) {
- return r + "!";
- }
-
- static void print(String what) {
- System.out.print("Hello, " + what);
- }
-
- static void printMore(Throwable t, String what) {
- System.out.println("!");
- }
-
- static String greetMore(String first, String second) {
- return "Hello, " + first + " and " + second;
- }
-
- static String exclaimMore(Throwable t, String r, String first) {
- return r + " (but " + first + " first)!";
- }
-
- static void voidTarget() {}
-
- static void voidCleanup(Throwable t, int a) {}
-
- static final Class<TryFinally> TRY_FINALLY = TryFinally.class;
-
- static final MethodType MT_greet = methodType(String.class, String.class);
- static final MethodType MT_exclaim = methodType(String.class, Throwable.class, String.class, String.class);
- static final MethodType MT_print = methodType(void.class, String.class);
- static final MethodType MT_printMore = methodType(void.class, Throwable.class, String.class);
- static final MethodType MT_greetMore = methodType(String.class, String.class, String.class);
- static final MethodType MT_exclaimMore = methodType(String.class, Throwable.class, String.class, String.class);
- static final MethodType MT_voidTarget = methodType(void.class);
- static final MethodType MT_voidCleanup = methodType(void.class, Throwable.class, int.class);
-
- static final MethodHandle MH_greet;
- static final MethodHandle MH_exclaim;
- static final MethodHandle MH_print;
- static final MethodHandle MH_printMore;
- static final MethodHandle MH_greetMore;
- static final MethodHandle MH_exclaimMore;
- static final MethodHandle MH_voidTarget;
- static final MethodHandle MH_voidCleanup;
-
- static final MethodType MT_hello = methodType(String.class, String.class);
- static final MethodType MT_printHello = methodType(void.class, String.class);
- static final MethodType MT_moreHello = methodType(String.class, String.class, String.class);
-
- static {
- try {
- MH_greet = LOOKUP.findStatic(TRY_FINALLY, "greet", MT_greet);
- MH_exclaim = LOOKUP.findStatic(TRY_FINALLY, "exclaim", MT_exclaim);
- MH_print = LOOKUP.findStatic(TRY_FINALLY, "print", MT_print);
- MH_printMore = LOOKUP.findStatic(TRY_FINALLY, "printMore", MT_printMore);
- MH_greetMore = LOOKUP.findStatic(TRY_FINALLY, "greetMore", MT_greetMore);
- MH_exclaimMore = LOOKUP.findStatic(TRY_FINALLY, "exclaimMore", MT_exclaimMore);
- MH_voidTarget = LOOKUP.findStatic(TRY_FINALLY, "voidTarget", MT_voidTarget);
- MH_voidCleanup = LOOKUP.findStatic(TRY_FINALLY, "voidCleanup", MT_voidCleanup);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class Fold {
-
- static int adder(int a, int b, int c) {
- return a + b + c;
- }
-
- static int adder1(int a, int b) {
- return a + b;
- }
-
- static int multer(int x, int q, int r, int s) {
- return x * q * r * s;
- }
-
- static int str(boolean b1, String s, boolean b2, int x) {
- return b1 && s.equals(String.valueOf(b2)) ? x : -x;
- }
-
- static boolean comb(String s, boolean b2) {
- return !s.equals(b2);
- }
-
- static String comb2(boolean b2, int x) {
- int ib = b2 ? 1 : 0;
- return ib == x ? "true" : "false";
- }
-
- static final Class<Fold> FOLD = Fold.class;
-
- static final MethodType MT_adder = methodType(int.class, int.class, int.class, int.class);
- static final MethodType MT_adder1 = methodType(int.class, int.class, int.class);
- static final MethodType MT_multer = methodType(int.class, int.class, int.class, int.class, int.class);
- static final MethodType MT_str = methodType(int.class, boolean.class, String.class, boolean.class, int.class);
- static final MethodType MT_comb = methodType(boolean.class, String.class, boolean.class);
- static final MethodType MT_comb2 = methodType(String.class, boolean.class, int.class);
-
- static final MethodHandle MH_adder;
- static final MethodHandle MH_adder1;
- static final MethodHandle MH_multer;
- static final MethodHandle MH_str;
- static final MethodHandle MH_comb;
- static final MethodHandle MH_comb2;
-
- static final MethodType MT_folded1 = methodType(int.class, int.class, int.class, int.class);
- static final MethodType MT_folded2 = methodType(int.class, String.class, boolean.class, int.class);
- static final MethodType MT_folded3 = methodType(int.class, boolean.class, boolean.class, int.class);
-
- static {
- try {
- MH_adder = LOOKUP.findStatic(FOLD, "adder", MT_adder);
- MH_adder1 = LOOKUP.findStatic(FOLD, "adder1", MT_adder1);
- MH_multer = LOOKUP.findStatic(FOLD, "multer", MT_multer);
- MH_str = LOOKUP.findStatic(FOLD, "str", MT_str);
- MH_comb = LOOKUP.findStatic(FOLD, "comb", MT_comb);
- MH_comb2 = LOOKUP.findStatic(FOLD, "comb2", MT_comb2);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
- }
-
- static class SpreadCollect {
-
- static String forSpreading(String s1, int i1, int i2, int i3, String s2) {
- return s1 + i1 + i2 + i3 + s2;
- }
-
- static String forCollecting(String s1, int[] is, String s2) {
- StringBuilder sb = new StringBuilder(s1);
- for (int i : is) {
- sb.append(i);
- }
- return sb.append(s2).toString();
- }
-
- static String forCollectingLeading(int[] is, String s) {
- return forCollecting("", is, s);
- }
-
- static final Class<SpreadCollect> SPREAD_COLLECT = SpreadCollect.class;
-
- static final MethodType MT_forSpreading = methodType(String.class, String.class, int.class, int.class, int.class, String.class);
- static final MethodType MT_forCollecting = methodType(String.class, String.class, int[].class, String.class);
- static final MethodType MT_forCollectingLeading = methodType(String.class, int[].class, String.class);
-
- static final MethodHandle MH_forSpreading;
- static final MethodHandle MH_forCollecting;
- static final MethodHandle MH_forCollectingLeading;
-
- static final MethodType MT_spreader = methodType(String.class, String.class, int[].class, String.class);
- static final MethodType MT_collector0 = methodType(String.class, String.class, String.class);
- static final MethodType MT_collector1 = methodType(String.class, String.class, int.class, String.class);
- static final MethodType MT_collector2 = methodType(String.class, String.class, int.class, int.class, String.class);
- static final MethodType MT_collector3 = methodType(String.class, String.class, int.class, int.class, int.class, String.class);
- static final MethodType MT_collectorLeading1 = methodType(String.class, int.class, String.class);
- static final MethodType MT_collectorLeading2 = methodType(String.class, int.class, int.class, String.class);
- static final MethodType MT_collectorLeading3 = methodType(String.class, int.class, int.class, int.class, String.class);
-
- static final String NONE_ERROR = "zero array length in MethodHandle.asCollector";
-
- static {
- try {
- MH_forSpreading = LOOKUP.findStatic(SPREAD_COLLECT, "forSpreading", MT_forSpreading);
- MH_forCollecting = LOOKUP.findStatic(SPREAD_COLLECT, "forCollecting", MT_forCollecting);
- MH_forCollectingLeading = LOOKUP.findStatic(SPREAD_COLLECT, "forCollectingLeading", MT_forCollectingLeading);
- } catch (Exception e) {
- throw new ExceptionInInitializerError(e);
- }
- }
-
- }
-
- static class FindSpecial {
-
- interface I1 {
- default String m() {
- return "I1.m";
- }
- }
-
- interface I2 {
- default String m() {
- return "I2.m";
- }
- }
-
- interface I3 {
- String q();
- }
-
- static class C implements I1, I2, I3 {
- public String m() {
- return I1.super.m();
- }
- public String q() {
- return "q";
- }
- }
-
- static final String ABSTRACT_ERROR = "no such method: test.java.lang.invoke.T8139885$FindSpecial$I3.q()String/invokeSpecial";
-
- }
-
- //
- // Auxiliary methods.
- //
-
- static MethodHandle[] mha(MethodHandle... mhs) {
- return mhs;
- }
-
-}