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feat(FeatureClassLoader): support class loading of Java 9+ #426

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merged 5 commits into from Aug 7, 2019
Merged

feat(FeatureClassLoader): support class loading of Java 9+ #426

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9fce763
feat(FeatureClassLoader): support class loading of Java 9+
bender316 Jul 31, 2019
ac3a496
added changes and link to PR to CHANGES.md
bender316 Aug 1, 2019
e28d8c3
fixed spotbugs errors
bender316 Aug 2, 2019
f4efc4a
implemented Java version check
bender316 Aug 5, 2019
e0af947
use java.specification.version as base for version parsing
bender316 Aug 6, 2019
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2 changes: 2 additions & 0 deletions CHANGES.md
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Expand Up @@ -7,6 +7,8 @@ You might be looking for:

### Version 1.25.0-SNAPSHOT - TBD (javadoc [lib](https://diffplug.github.io/spotless/javadoc/spotless-lib/snapshot/) [lib-extra](https://diffplug.github.io/spotless/javadoc/spotless-lib-extra/snapshot/), [snapshot repo](https://oss.sonatype.org/content/repositories/snapshots/com/diffplug/spotless/))

* Fixes class loading issue with Java 9+ ([#426](https://github.com/diffplug/spotless/pull/426)).

### Version 1.24.0 - July 29th 2018 (javadoc [lib](https://diffplug.github.io/spotless/javadoc/spotless-lib/1.24.0/) [lib-extra](https://diffplug.github.io/spotless/javadoc/spotless-lib-extra/1.24.0/), artifact [lib]([jcenter](https://bintray.com/diffplug/opensource/spotless-lib), [lib-extra]([jcenter](https://bintray.com/diffplug/opensource/spotless-lib-extra)))

* Updated default eclipse-wtp from 4.8.0 to 4.12.0 ([#423](https://github.com/diffplug/spotless/pull/423)).
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21 changes: 20 additions & 1 deletion lib/src/main/java/com/diffplug/spotless/FeatureClassLoader.java
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Expand Up @@ -15,13 +15,16 @@
*/
package com.diffplug.spotless;

import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

import javax.annotation.Nullable;

/**
* This class loader is used to load classes of Spotless features from a search
* path of URLs.<br/>
Expand Down Expand Up @@ -59,7 +62,7 @@ class FeatureClassLoader extends URLClassLoader {
*/

FeatureClassLoader(URL[] urls, ClassLoader buildToolClassLoader) {
super(urls, null);
super(urls, getParentClassLoader());
Objects.requireNonNull(buildToolClassLoader);
this.buildToolClassLoader = buildToolClassLoader;
}
Expand All @@ -74,4 +77,20 @@ protected Class<?> findClass(String name) throws ClassNotFoundException {
return super.findClass(name);
}

/**
* Making spotless Java 9+ compatible. In Java 8 (and minor) the bootstrap
* class loader saw every platform class. In Java 9+ it was changed so the
* bootstrap class loader does not see all classes anymore. This might lead
* to ClassNotFoundException in formatters (e.g. freshmark).
*
* @return <code>null</code> on Java 8 (and minor), otherwise <code>PlatformClassLoader</code>
*/
@Nullable
private static ClassLoader getParentClassLoader() {
try {
return (ClassLoader) ClassLoader.class.getMethod("getPlatformClassLoader").invoke(null);
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} catch (final NoSuchMethodException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | SecurityException e) {
return null;
}
}
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}
2 changes: 2 additions & 0 deletions plugin-gradle/CHANGES.md
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Expand Up @@ -2,6 +2,8 @@

### Version 3.25.0-SNAPSHOT - TBD ([javadoc](https://diffplug.github.io/spotless/javadoc/snapshot/), [snapshot](https://oss.sonatype.org/content/repositories/snapshots/com/diffplug/spotless/spotless-plugin-gradle/))

* Fixes class loading issue with Java 9+ ([#426](https://github.com/diffplug/spotless/pull/426)).

### Version 3.24.0 - July 29th 2019 ([javadoc](https://diffplug.github.io/spotless/javadoc/spotless-plugin-gradle/3.24.0/), [jcenter](https://bintray.com/diffplug/opensource/spotless-plugin-gradle/3.24.0))

* Updated default eclipse-wtp from 4.8.0 to 4.12.0 ([#423](https://github.com/diffplug/spotless/pull/423)).
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2 changes: 2 additions & 0 deletions plugin-maven/CHANGES.md
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Expand Up @@ -2,6 +2,8 @@

### Version 1.25.0-SNAPSHOT - TBD ([javadoc](https://diffplug.github.io/spotless/javadoc/spotless-maven-plugin/snapshot/), [snapshot](https://oss.sonatype.org/content/repositories/snapshots/com/diffplug/spotless/spotless-maven-plugin/))

* Fixes class loading issue with Java 9+ ([#426](https://github.com/diffplug/spotless/pull/426)).

### Version 1.24.0 - July 29th 2019 ([javadoc](https://diffplug.github.io/spotless/javadoc/spotless-maven-plugin/1.24.0/), [jcenter](https://bintray.com/diffplug/opensource/spotless-maven-plugin/1.24.0))

* Updated default eclipse-wtp from 4.8.0 to 4.12.0 ([#423](https://github.com/diffplug/spotless/pull/423)).
Expand Down