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46 changes: 46 additions & 0 deletions
46
spark-common/src/main/java/me/lucko/spark/common/util/classfinder/ClassFinder.java
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/* | ||
* This file is part of spark. | ||
* | ||
* Copyright (c) lucko (Luck) <[email protected]> | ||
* Copyright (c) contributors | ||
* | ||
* This program is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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package me.lucko.spark.common.util.classfinder; | ||
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import com.google.common.collect.ImmutableList; | ||
import org.checkerframework.checker.nullness.qual.Nullable; | ||
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public interface ClassFinder { | ||
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/** | ||
* Creates a ClassFinder that combines the results of multiple other finders. | ||
* | ||
* @param finders the other class finders | ||
* @return the combined class finder | ||
*/ | ||
static ClassFinder combining(ClassFinder... finders) { | ||
return new CombinedClassFinder(ImmutableList.copyOf(finders)); | ||
} | ||
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/** | ||
* Attempts to find a class by name. | ||
* | ||
* @param className the name of the class | ||
* @return the class, if found | ||
*/ | ||
@Nullable Class<?> findClass(String className); | ||
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} |
44 changes: 44 additions & 0 deletions
44
spark-common/src/main/java/me/lucko/spark/common/util/classfinder/CombinedClassFinder.java
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/* | ||
* This file is part of spark. | ||
* | ||
* Copyright (c) lucko (Luck) <[email protected]> | ||
* Copyright (c) contributors | ||
* | ||
* This program is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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package me.lucko.spark.common.util.classfinder; | ||
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import org.checkerframework.checker.nullness.qual.Nullable; | ||
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import java.util.List; | ||
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class CombinedClassFinder implements ClassFinder { | ||
private final List<ClassFinder> finders; | ||
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CombinedClassFinder(List<ClassFinder> finders) { | ||
this.finders = finders; | ||
} | ||
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@Override | ||
public @Nullable Class<?> findClass(String className) { | ||
for (ClassFinder finder : this.finders) { | ||
Class<?> clazz = finder.findClass(className); | ||
if (clazz != null) { | ||
return clazz; | ||
} | ||
} | ||
return null; | ||
} | ||
} |
40 changes: 40 additions & 0 deletions
40
spark-common/src/main/java/me/lucko/spark/common/util/classfinder/FallbackClassFinder.java
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,40 @@ | ||
/* | ||
* This file is part of spark. | ||
* | ||
* Copyright (c) lucko (Luck) <[email protected]> | ||
* Copyright (c) contributors | ||
* | ||
* This program is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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package me.lucko.spark.common.util.classfinder; | ||
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import org.checkerframework.checker.nullness.qual.Nullable; | ||
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/** | ||
* Uses {@link Class#forName(String)} to find a class reference for given class names. | ||
*/ | ||
public enum FallbackClassFinder implements ClassFinder { | ||
INSTANCE; | ||
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@Override | ||
public @Nullable Class<?> findClass(String className) { | ||
try { | ||
return Class.forName(className); | ||
} catch (Throwable e) { | ||
return null; | ||
} | ||
} | ||
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} |
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