The Tor Browser / file comparison
comparison: mobile/android/base/background/bagheera/BoundedByteArrayEntity.java
mobile/android/base/background/bagheera/BoundedByteArrayEntity.java
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.background.bagheera; | |
| 6 | |
| 7 import java.io.ByteArrayInputStream; | |
| 8 import java.io.IOException; | |
| 9 import java.io.InputStream; | |
| 10 import java.io.OutputStream; | |
| 11 | |
| 12 import ch.boye.httpclientandroidlib.entity.AbstractHttpEntity; | |
| 13 import ch.boye.httpclientandroidlib.entity.ByteArrayEntity; | |
| 14 | |
| 15 /** | |
| 16 * An entity that acts like {@link ByteArrayEntity}, but exposes a window onto | |
| 17 * the byte array that is a subsection of the array. The purpose of this is to | |
| 18 * allow a smaller entity to be created without having to resize the source | |
| 19 * array. | |
| 20 */ | |
| 21 public class BoundedByteArrayEntity extends AbstractHttpEntity implements | |
| 22 Cloneable { | |
| 23 protected final byte[] content; | |
| 24 protected final int start; | |
| 25 protected final int end; | |
| 26 protected final int length; | |
| 27 | |
| 28 /** | |
| 29 * Create a new entity that behaves exactly like a {@link ByteArrayEntity} | |
| 30 * created with a copy of <code>b</code> truncated to ( | |
| 31 * <code>end - start</code>) bytes, starting at <code>start</code>. | |
| 32 * | |
| 33 * @param b the byte array to use. | |
| 34 * @param start the start index. | |
| 35 * @param end the end index. | |
| 36 */ | |
| 37 public BoundedByteArrayEntity(final byte[] b, final int start, final int end) { | |
| 38 if (b == null) { | |
| 39 throw new IllegalArgumentException("Source byte array may not be null."); | |
| 40 } | |
| 41 | |
| 42 if (end < start || | |
| 43 start < 0 || | |
| 44 end < 0 || | |
| 45 start > b.length || | |
| 46 end > b.length) { | |
| 47 throw new IllegalArgumentException("Bounds out of range."); | |
| 48 } | |
| 49 this.content = b; | |
| 50 this.start = start; | |
| 51 this.end = end; | |
| 52 this.length = end - start; | |
| 53 } | |
| 54 | |
| 55 @Override | |
| 56 public boolean isRepeatable() { | |
| 57 return true; | |
| 58 } | |
| 59 | |
| 60 @Override | |
| 61 public long getContentLength() { | |
| 62 return this.length; | |
| 63 } | |
| 64 | |
| 65 @Override | |
| 66 public InputStream getContent() { | |
| 67 return new ByteArrayInputStream(this.content, this.start, this.length); | |
| 68 } | |
| 69 | |
| 70 @Override | |
| 71 public void writeTo(final OutputStream outstream) throws IOException { | |
| 72 if (outstream == null) { | |
| 73 throw new IllegalArgumentException("Output stream may not be null."); | |
| 74 } | |
| 75 outstream.write(this.content); | |
| 76 outstream.flush(); | |
| 77 } | |
| 78 | |
| 79 @Override | |
| 80 public boolean isStreaming() { | |
| 81 return false; | |
| 82 } | |
| 83 | |
| 84 @Override | |
| 85 public Object clone() throws CloneNotSupportedException { | |
| 86 return super.clone(); | |
| 87 } | |
| 88 } |
