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package eu.etaxonomy.cdm.io.common;
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import java.io.Serializable;
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import java.util.Set;
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import eu.etaxonomy.cdm.io.common.events.IIoObserver;
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public interface IIoObservable extends Serializable {
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/**
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* Sets the observers for this object
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* @return
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*/
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public abstract Set<IIoObserver> getObservers();
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/**
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* Adds a new observer for this object.
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* @param observer
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* @return
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*/
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public abstract boolean addObserver(IIoObserver observer);
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/**
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* Adds a set of new observer for this object.
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* @param observer
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* @return
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*/
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public abstract void addObservers(Set<IIoObserver> observer);
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/**
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* Removes an observer from this object
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* @param observer
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* @return
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*/
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public abstract boolean removeObserver(IIoObserver observer);
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/**
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* Clears the observer list so that this object no longer has any observers.
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*/
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public void removeObservers();
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/**
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* Returns the number of observers of this Observable object.
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* @return number of observers
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*/
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public int countObservers();
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}
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