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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| package au.com.southsky.jfreesane; | ||
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| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.OutputStream; | ||
|
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| final class ByteStreams { | ||
| private static int COPY_BUF_SIZE = 8192; | ||
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| private ByteStreams() {} | ||
|
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| /** | ||
| * A stand-in for {@code InputStream.readAllBytes} available in Java 9+. We currently support Java | ||
| * 8, so this is what we have to do. | ||
| */ | ||
| static int readAllBytes(InputStream in, byte[] dst) throws IOException { | ||
| int pos = 0; | ||
| while (pos < dst.length) { | ||
| int r = in.read(dst, pos, dst.length - pos); | ||
| if (r == -1) { | ||
| return pos; | ||
| } | ||
|
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| pos += r; | ||
| } | ||
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| return pos; | ||
| } | ||
|
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| /** | ||
| * Copies up to maxBytes from src to dst, returning how many were copied. | ||
| */ | ||
| static int copy(InputStream src, OutputStream dst, int maxBytes) throws IOException { | ||
| byte[] buf = new byte[Math.min(maxBytes, COPY_BUF_SIZE)]; | ||
| int total = 0; | ||
|
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| while (total < maxBytes) { | ||
| int r = src.read(buf, 0, Math.min(maxBytes - total, COPY_BUF_SIZE)); | ||
| if (r == -1) { | ||
| break; | ||
| } | ||
| dst.write(buf, 0, r); | ||
| total += r; | ||
| } | ||
|
|
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| return total; | ||
| } | ||
| } |
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43 changes: 43 additions & 0 deletions
43
src/main/java/au/com/southsky/jfreesane/Preconditions.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package au.com.southsky.jfreesane; | ||
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| final class Preconditions { | ||
| private Preconditions() {} | ||
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| static void checkState(boolean state, String message, Object... args) { | ||
| if (!state) { | ||
| throw new IllegalStateException(String.format(message, args)); | ||
| } | ||
| } | ||
|
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| static void checkState(boolean state, String message) { | ||
| if (!state) { | ||
| throw new IllegalStateException(message); | ||
| } | ||
| } | ||
|
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| static void checkState(boolean state) { | ||
| if (!state) { | ||
| throw new IllegalStateException(); | ||
| } | ||
| } | ||
|
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| static void checkArgument(boolean arg) { | ||
| if (!arg) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| } | ||
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| static void checkArgument(boolean arg, String message, Object... args) { | ||
| if (!arg) { | ||
| throw new IllegalArgumentException(String.format(message, args)); | ||
| } | ||
| } | ||
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| static <T> T checkNotNull(T obj) { | ||
| if (obj == null) { | ||
| throw new NullPointerException(); | ||
| } | ||
|
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| return obj; | ||
| } | ||
| } |
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