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27 package org.apache.hc.client5.http.impl.cache;
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29 import java.util.concurrent.atomic.AtomicReference;
30
31 import org.apache.hc.client5.http.cache.Resource;
32 import org.apache.hc.client5.http.cache.ResourceIOException;
33 import org.apache.hc.core5.annotation.Contract;
34 import org.apache.hc.core5.annotation.ThreadingBehavior;
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41 @Contract(threading = ThreadingBehavior.IMMUTABLE)
42 public class HeapResource extends Resource {
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44 private static final long serialVersionUID = -2078599905620463394L;
45
46 private final AtomicReference<byte[]> arrayRef;
47
48 public HeapResource(final byte[] b) {
49 super();
50 this.arrayRef = new AtomicReference<>(b);
51 }
52
53 @Override
54 public byte[] get() throws ResourceIOException {
55 final byte[] byteArray = this.arrayRef.get();
56 if (byteArray != null) {
57 return byteArray;
58 }
59 throw new ResourceIOException("Resource already disposed");
60 }
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62 @Override
63 public long length() {
64 final byte[] byteArray = this.arrayRef.get();
65 if (byteArray != null) {
66 return byteArray.length;
67 } else {
68 return -1;
69 }
70 }
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72 @Override
73 public void dispose() {
74 this.arrayRef.set(null);
75 }
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77 @Override
78 public String toString() {
79 return "[" +
80 "heap," +
81 "len=" + length() +
82 ']';
83 }
84
85 }