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106 changes: 106 additions & 0 deletions
106
src/main/java/com/fasterxml/jackson/module/afterburner/util/ClassName.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| package com.fasterxml.jackson.module.afterburner.util; | ||
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| import java.util.zip.Adler32; | ||
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| /** | ||
| * Accessing various permutations of dotted/slashed representations gets | ||
| * tiresome after a while, so here's an abstraction for hiding complexities, | ||
| * and for performing lazy transformations as necessary. | ||
| */ | ||
| public class ClassName | ||
| { | ||
| public final static String TEMPLATE_SUFFIX = actualClassName("", 0L); | ||
|
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| // Basenames with no checksum suffix | ||
| protected final String _dottedBase; | ||
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| protected String _slashedBase; | ||
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| protected String _dottedName, _slashedName; | ||
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| protected long _checksum; | ||
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| private ClassName(String dottedBase) { | ||
| _dottedBase = dottedBase; | ||
| } | ||
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| public static ClassName constructFor(Class<?> baseClass, String suffix) { | ||
| return new ClassName(baseClass.getName() + suffix); | ||
| } | ||
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| public void assignChecksum(byte[] data) { | ||
| long l = adler32(data); | ||
| if (_checksum != 0L) { | ||
| throw new IllegalStateException("Trying to re-assign checksum as 0x"+Long.toHexString(l) | ||
| +" (had 0x"+Long.toHexString(_checksum)+")"); | ||
| } | ||
| // Need to mask unlikely checksum of 0 | ||
| if (l == 0L) { | ||
| l = 1; | ||
| } | ||
| _checksum = l; | ||
| } | ||
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| public String getDottedTemplate() { | ||
| return _dottedBase + TEMPLATE_SUFFIX; | ||
| } | ||
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| public String getSlashedTemplate() { | ||
| return getSlashedBase() + TEMPLATE_SUFFIX; | ||
| } | ||
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| public String getDottedName() { | ||
| if (_dottedName == null) { | ||
| if (_checksum == 0) { | ||
| throw new IllegalStateException("No checksum assigned yet"); | ||
| } | ||
| _dottedName = String.format("%s%08x", getDottedBase(), (int) _checksum); | ||
| } | ||
| return _dottedName; | ||
| } | ||
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| public String getSlashedName() { | ||
| if (_slashedName == null) { | ||
| if (_checksum == 0) { | ||
| throw new IllegalStateException("No checksum assigned yet"); | ||
| } | ||
| _slashedName = String.format("%s%08x", getSlashedBase(), (int) _checksum); | ||
| } | ||
| return _slashedName; | ||
| } | ||
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| public String getSourceFilename() { | ||
| return getSlashedBase() + ".java"; | ||
| } | ||
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| public String getDottedBase() { | ||
| return _dottedBase; | ||
| } | ||
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| public String getSlashedBase() { | ||
| if (_slashedBase == null) { | ||
| _slashedBase = dotsToSlashes(_dottedBase); | ||
| } | ||
| return _slashedBase; | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return getDottedName(); | ||
| } | ||
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| private static String actualClassName(String base, long checksum) { | ||
| return String.format("%s%08x", base, (int) checksum); | ||
| } | ||
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| protected static String dotsToSlashes(String className) { | ||
| return className.replace(".", "/"); | ||
| } | ||
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| protected static long adler32(byte[] data) | ||
| { | ||
| Adler32 adler = new Adler32(); | ||
| adler.update(data); | ||
| return adler.getValue(); | ||
| } | ||
| } |
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