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DSL Platform compatible Java JSON library (https://dsl-platform.com)

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package com.dslplatform.json.runtime;

import com.dslplatform.json.ConfigurationException;
import com.dslplatform.json.DslJson;
import com.dslplatform.json.JsonReader;
import com.dslplatform.json.SerializationException;

import java.io.IOException;
import java.lang.reflect.Type;

class LazyAttributeDecoder implements JsonReader.BindObject {

	private final Settings.BiConsumer write;
	private JsonReader.ReadObject decoder;
	private final DslJson json;
	private final Type type;

	LazyAttributeDecoder(
			final Settings.BiConsumer write,
			final DslJson json,
			final Type type) {
		if (write == null) throw new IllegalArgumentException("write can't be null");
		if (json == null) throw new IllegalArgumentException("json can't be null");
		if (type == null) throw new IllegalArgumentException("type can't be null");
		this.write = write;
		this.json = json;
		this.type = type;
	}

	@Override
	public T bind(final JsonReader reader, final T instance) throws IOException {
		if (decoder == null) {
			decoder = json.tryFindReader(type);
			if (decoder == null) {
				throw new ConfigurationException("Unable to find reader for " + type);
			}
		}
		final P attr = decoder.read(reader);
		write.accept(instance, attr);
		return instance;
	}
}