1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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13  * accompanied this code).
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23 
24 /*
25  * @test
26  * @bug 4833719
27  * @summary Verify MappedByteBuffer force on compact, duplicate, and slice views
28  * @run testng ForceViews
29  */
30 package test.java.nio.MappedByteBuffer;
31 
32 import java.io.IOException;
33 import java.nio.ByteBuffer;
34 import java.nio.MappedByteBuffer;
35 import java.nio.ReadOnlyBufferException;
36 import java.nio.channels.FileChannel;
37 import static java.nio.channels.FileChannel.MapMode.*;
38 import java.nio.file.Path;
39 import static java.nio.file.StandardOpenOption.*;
40 import java.util.function.BiFunction;
41 
42 import org.testng.Assert;
43 import org.testng.annotations.AfterTest;
44 import org.testng.annotations.BeforeTest;
45 import org.testng.annotations.DataProvider;
46 import org.testng.annotations.Test;
47 
48 public class ForceViews {
49 
Segment(int position, int length)50     static record Segment(int position, int length) {}
51 
52     private FileChannel fc;
53 
54     // Android-changed: TestNgRunner recognizes this method as a test method.
55     // @BeforeTest(alwaysRun=true)
openChannel()56     private void openChannel() throws IOException {
57         // Android-changed: test.src is a read-only directory on Android.
58         // Path file = Path.of(System.getProperty("test.src", "."), "junk");
59         Path file = Path.of(System.getProperty("java.io.tmpdir", "."), ForceViews.class.getName());
60         fc = FileChannel.open(file, CREATE_NEW, READ, WRITE, DELETE_ON_CLOSE);
61         ByteBuffer buf = ByteBuffer.wrap(new byte[1024]);
62         fc.write(buf);
63         fc.position(0);
64     }
65 
66     // Android-changed: TestNgRunner recognizes this method as a test method.
67     // @AfterTest(alwaysRun=true)
closeChannel()68     private void closeChannel() throws IOException {
69         fc.close();
70     }
71 
72     @DataProvider
provider()73     public Object[][] provider() throws IOException {
74         BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> absSlice =
75             (m, s) -> { return m.slice(s.position, s.length); };
76         BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> relSlice =
77             (m, s) -> { m.position(s.position); m.limit(s.position + s.length);
78                         // Android-changed: Explicit casting due to @CovariantReturnType methods.
79                         return (MappedByteBuffer) m.slice(); };
80         BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> duplicate=
81             // Android-changed: Explicit casting due to @CovariantReturnType methods.
82             (m, s) -> { return (MappedByteBuffer) m.duplicate(); };
83         BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> compact =
84             // Android-changed: Explicit casting due to @CovariantReturnType methods.
85             (m, s) -> { return (MappedByteBuffer) m.compact(); };
86 
87         Object[][] result = new Object[][] {
88             {"Absolute slice", fc, 256, 512, 128, 128, 32, 32, absSlice},
89             {"Relative slice", fc, 256, 512, 0, 128, 32, 32, relSlice},
90             {"Duplicate", fc, 256, 512, 0, 256, 32, 32, duplicate},
91             {"Compact", fc, 256, 512, 0, 256, 32, 32, compact}
92         };
93 
94         return result;
95     }
96 
97     // Android-changed: TestNgRunner isn't able to run this parameterized test.
98     // @Test(dataProvider = "provider")
test(String tst, FileChannel fc, int mapPosition, int mapLength, int sliceIndex, int sliceLength, int regionOffset, int regionLength, BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> f)99     private void test(String tst, FileChannel fc, int mapPosition, int mapLength,
100         int sliceIndex, int sliceLength, int regionOffset, int regionLength,
101         BiFunction<MappedByteBuffer,Segment,MappedByteBuffer> f)
102         throws Exception {
103         MappedByteBuffer mbb = fc.map(READ_WRITE, mapPosition, mapLength);
104         mbb = f.apply(mbb, new Segment(sliceIndex, sliceLength));
105         for (int i = regionOffset; i < regionOffset + regionLength; i++) {
106             mbb.put(i, (byte)i);
107         }
108         mbb.force(regionOffset, regionOffset + regionLength);
109 
110         int fcPos = mapPosition + sliceIndex + regionOffset;
111         int mbbPos = regionOffset;
112         int length = regionLength;
113 
114         ByteBuffer buf = ByteBuffer.allocate(length);
115         fc.position(fcPos);
116         fc.read(buf);
117         for (int i = 0; i < length; i++) {
118             int fcVal = buf.get(i);
119             int mbbVal = mbb.get(mbbPos + i);
120             int val = regionOffset + i;
121             Assert.assertTrue(fcVal == val && mbbVal == val,
122                 String.format("%s: i %d, fcVal %d, mbbVal %d, val %d",
123                     tst, i, fcVal, mbbVal, val));
124         }
125     }
126 
127     // BEGIN Android-changed: TestNgRunner recognizes @BeforeTest and @AfterTest methods correctly.
assertTest(int index)128     private void assertTest(int index) throws Exception {
129         Object[] o = provider()[index];
130         openChannel();
131         try {
132             test((String) o[0], fc, (int) o[2], (int) o[3], (int) o[4], (int) o[5], (int) o[6],
133                     (int) o[7], (BiFunction<MappedByteBuffer, Segment, MappedByteBuffer>) o[8]);
134         } finally {
135             closeChannel();
136         }
137     }
138 
139     @Test
testAbsoluteSlice()140     public void testAbsoluteSlice() throws Exception {
141         assertTest(0);
142     }
143     @Test
testRelativeSlice()144     public void testRelativeSlice() throws Exception {
145         assertTest(0);
146     }
147     @Test
testDuplicate()148     public void testDuplicate() throws Exception {
149         assertTest(0);
150     }
151     @Test
testCompact()152     public void testCompact() throws Exception {
153         assertTest(0);
154     }
155     // END Android-changed: TestNgRunner recognizes @BeforeTest and @AfterTest methods correctly.
156 }
157