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implement MetaNumberPreprocessor

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dfsek 2021-07-21 14:38:55 -07:00
parent 57658d2268
commit d8bbc95c1e
1 changed files with 46 additions and 0 deletions
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common/implementation/src/main/java/com/dfsek/terra/config/preprocessor/MetaNumberPreprocessor.java Normal file
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package com.dfsek.terra.config.preprocessor;
import com.dfsek.paralithic.eval.parser.Parser;
import com.dfsek.paralithic.eval.tokenizer.ParseException;
import com.dfsek.tectonic.config.Configuration;
import com.dfsek.tectonic.exception.LoadException;
import com.dfsek.tectonic.loading.ConfigLoader;
import com.dfsek.tectonic.preprocessor.Result;
import com.dfsek.tectonic.util.ReflectionUtil;
import com.dfsek.terra.api.config.meta.Meta;
import com.dfsek.terra.api.util.reflection.TypeKey;
import org.jetbrains.annotations.NotNull;
import java.lang.reflect.AnnotatedType;
import java.util.Map;
public class MetaNumberPreprocessor extends MetaPreprocessor<Meta> {
public static final TypeKey<@Meta String> META_STRING_KEY = new TypeKey<>() {};
public MetaNumberPreprocessor(Map<String, Configuration> configs) {
super(configs);
}
@SuppressWarnings("unchecked")
@Override
public @NotNull <T> Result<T> process(AnnotatedType t, T c, ConfigLoader loader, Meta annotation) {
if(t.getType() instanceof Class && isNumber((Class<?>) t.getType()) && c instanceof String) {
String expression = (String) loader.loadType(META_STRING_KEY.getAnnotatedType(), c);
try {
return (Result<T>) Result.overwrite(new Parser().parse(expression).evaluate());
} catch(ParseException e) {
throw new LoadException("Invalid expression: ", e);
}
}
return Result.noOp();
}
private static boolean isNumber(Class<?> clazz) {
return Number.class.isAssignableFrom(clazz)
|| byte.class.equals(clazz)
|| int.class.equals(clazz)
|| long.class.equals(clazz)
|| float.class.equals(clazz)
|| double.class.equals(clazz);
}
}