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• ValueGenerator.java

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de.invation.code.toval.misc.valuegeneration.ValueGenerator Maven / Gradle / Ivy

package de.invation.code.toval.misc.valuegeneration;

import de.invation.code.toval.validate.InconsistencyException;


/**
 * Interface for value generators.

 * A value generator produces values of a specific type and returns it by the method {@link #getNextValue()}.
 * Value generation is only permitted if the generator is in a valid state.

 * Once entered a valid state, the generator cannot enter an invalid state again.

 * If value generations are requested in invalid state, 
 * Exceptions of type {@link ValueGenerationException} are thrown.
 *
 * @param 
 */
public interface ValueGenerator {
	
	public E getNextValue() throws ValueGenerationException;
	
	public boolean isValid();
	
	@SuppressWarnings("rawtypes")
	public Class getValueClass() throws InconsistencyException;
	
	public boolean isEmpty();
	
	public ValueGenerator clone();
}