# ResultSetReaderRegistry.java

    package org.codefilarete.stalactite.sql.statement.binder;

    import org.codefilarete.stalactite.sql.ddl.structure.Column;
    import org.codefilarete.stalactite.sql.statement.SQLStatement.BindingException;

    /**
     * Contract for a registry of {@link ResultSetReader}s per {@link Column} and {@link Class}.
     *
     * @author Guillaume Mary
     */
    public interface ResultSetReaderRegistry extends ResultSetReaderProvider<Column> {

    	default <T> ResultSetReader<T> getReader(Class<T> key) {
    		ResultSetReader<T> writer = doGetReader(key);
    		if (writer == null) {
    			throw new BindingException("Reader for " + key + " is not registered");
    		}
    		return writer;
    	}

    	<T> ResultSetReader<T> doGetReader(Class<T> key);
    }