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/* The contents of this file are subject to the license and copyright terms
 * detailed in the license directory at the root of the source tree (also 
 * available online at http://fedora-commons.org/license/).
 */
package org.fcrepo.client.objecteditor;

import java.awt.event.ActionListener;

import java.io.IOException;
import java.io.InputStream;

/**
 * Edit content of certain types in a JComponent.
 */
public abstract class ContentEditor
        extends ContentViewer {

    /**
     * Always returns true.
     */
    @Override
    public final boolean isEditor() {
        return true;
    }

    public void setPIDAndDSID(String pid, String dsid) {
    }

    /**
     * Called when the caller wants what is in the view to be considered "not
     * dirty" because it's been saved that way.
     */
    public abstract void changesSaved();

    /**
     * Called when the caller wants to update the view back to the data was
     * originally passed in.
     */
    public abstract void undoChanges();

    /**
     * Returns true if the content should be considered "dirty" (e.g. it has
     * changed due to some form of editing).
     */
    public abstract boolean isDirty();

    /**
     * Sets the listener that this ContentEditor will notify via
     * listener.actionPerformed(...) when any content-changing events occur that
     * could potentially affect its "dirty state" (whether going from not dirty
     * to dirty, or dirty to not dirty).
     */
    public abstract void setContentChangeListener(ActionListener listener);

    /**
     * Gets the content in its edited state.
     */
    public abstract InputStream getContent() throws IOException;

}