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Utility classes needed for search and compiler applications

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package net.amygdalum.util.graph;

import java.util.Map;

public class DataDescriptor {
	
	private Class clazz;
	private String key;
	
	public DataDescriptor(Class clazz, String key) {
		this.clazz = clazz;
		this.key = key;
	}

	public T from(Map, Object> repo) {
		return clazz.cast(repo.get(this));
	}

	public void to(Map, Object> repo, T data) {
		repo.put(this, data);
	}

	@Override
	public int hashCode() {
		return clazz.hashCode() * 13 + key.hashCode();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (obj == null) {
			return false;
		}
		if (getClass() != obj.getClass()) {
			return false;
		}
		DataDescriptor that = (DataDescriptor) obj;
		return this.clazz == that.clazz
			&& this.key.equals(that.key);
	}

	
	
}