aQute.lib.json.Handler Maven / Gradle / Ivy
package aQute.lib.json;
import static java.lang.invoke.MethodHandles.publicLookup;
import java.io.IOException;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Type;
import java.util.Map;
public abstract class Handler {
public abstract void encode(Encoder app, Object object, Map visited) throws IOException, Exception;
public Object decodeObject(Decoder isr) throws Exception {
throw new UnsupportedOperationException("Cannot be mapped to object " + this);
}
public Object decodeArray(Decoder isr) throws Exception {
throw new UnsupportedOperationException("Cannot be mapped to array " + this);
}
public Object decode(Decoder dec, String s) throws Exception {
throw new UnsupportedOperationException("Cannot be mapped to string " + this);
}
public Object decode(Decoder dec, Number s) throws Exception {
throw new UnsupportedOperationException("Cannot be mapped to number " + this);
}
public Object decode(Decoder dec, boolean s) {
throw new UnsupportedOperationException("Cannot be mapped to boolean " + this);
}
public Object decode(Decoder dec) {
return null;
}
private static final MethodType defaultConstructor = MethodType.methodType(void.class);
static T newInstance(Class rawClass) throws Exception {
try {
return (T) MethodHandles.publicLookup()
.findConstructor(rawClass, defaultConstructor)
.invoke();
} catch (Error | Exception e) {
throw e;
} catch (Throwable e) {
throw new InvocationTargetException(e);
}
}
static void setField(Field f, Object targetObject, Object value) throws Exception {
try {
publicLookup().unreflectSetter(f)
.invoke(targetObject, value);
} catch (Error | Exception e) {
throw e;
} catch (Throwable e) {
throw new InvocationTargetException(e);
}
}
static T getField(Field f, Object targetObject) throws Exception {
try {
return (T) publicLookup().unreflectGetter(f)
.invoke(targetObject);
} catch (Error | Exception e) {
throw e;
} catch (Throwable e) {
throw new InvocationTargetException(e);
}
}
}