LiteLoader / LiteLoader · Files

package com.mumfrey.liteloader.transformers.event.json;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.mumfrey.liteloader.core.runtime.Methods;
import com.mumfrey.liteloader.transformers.event.MethodInfo;

/**
 * A simple registry of MethodInfo objects parsed from the JSON, objects which consume the specified
 * MethodInfo objects will be passed an instance of this object at parse time.
 * 
 * @author Adam Mummery-Smith
 */
public class JsonMethods
{
	/**
	 * Serialised obfusctation entries
	 */
	private final JsonObfuscationTable obfuscation;

	/**
	 * Method descriptors
	 */
	private final List<JsonDescriptor> descriptors;
	
	/**
	 * Method descriptors which have been parsed from the descriptors collection
	 */
	private Map<String, MethodInfo> methods = new HashMap<String, MethodInfo>();

	/**
	 * @param obfuscation
	 * @param descriptors
	 */
	public JsonMethods(JsonObfuscationTable obfuscation, List<JsonDescriptor> descriptors)
	{
		this.obfuscation = obfuscation;
		this.descriptors = descriptors;
		
		this.parse();
	}

	/**
	 * 
	 */
	private void parse()
	{
		if (this.descriptors != null)
		{
			for (JsonDescriptor descriptor : this.descriptors)
			{
				this.methods.put(descriptor.getKey(), descriptor.parse(this.obfuscation));
			}
		}
	}

	/**
	 * Fetches a method descriptor by token
	 * 
	 * @param token
	 */
	public MethodInfo get(String token)
	{
		String key = JsonEvents.parseToken(token);
		if (key == null)
		{
			throw new InvalidEventJsonException("\"" + token + "\" is not a valid token");
		}

		MethodInfo method = this.methods.get(key);
		if (method != null)
		{
			return method;
		}
		
		MethodInfo builtinMethod = Methods.getByName(key);
		if (builtinMethod != null)
		{
			return builtinMethod;
		}
		
		throw new InvalidEventJsonException("Could not locate method descriptor with token " + token);
	}
}