aQute.lib.json.SpecialHandler Maven / Gradle / Ivy
package aQute.lib.json;
import static java.lang.invoke.MethodHandles.publicLookup;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.regex.Pattern;
public class SpecialHandler extends Handler {
@SuppressWarnings("rawtypes")
final Class type;
final Method valueOf;
final Constructor constructor;
public SpecialHandler(Class type, Constructor constructor, Method valueOf) {
this.type = type;
this.constructor = constructor;
this.valueOf = valueOf;
}
@Override
public void encode(Encoder app, Object object, Map visited) throws IOException, Exception {
StringHandler.string(app, object.toString());
}
@Override
public Object decode(Decoder dec, String s) throws Exception {
if (type == Pattern.class)
return Pattern.compile(s);
if (constructor != null) {
try {
return publicLookup().unreflectConstructor(constructor)
.invoke(s);
} catch (Error | Exception e) {
throw e;
} catch (Throwable e) {
throw new RuntimeException(e);
}
}
if (valueOf != null) {
try {
return publicLookup().unreflect(valueOf)
.invoke(s);
} catch (Error | Exception e) {
throw e;
} catch (Throwable e) {
throw new RuntimeException(e);
}
}
throw new IllegalArgumentException("Do not know how to convert a " + type + " from a string");
}
}