PropertyProvider.java

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package org.netbeans.modules.ruby.spi.project.support.rake;

import java.util.Map;
import javax.swing.event.ChangeListener;

/**
 * Provides a set of Ant property definitions that might be evaluated in
 * some context.
 * <p>
 * This interface defines no independent thread safety, but in typical usage
 * it will be used with the project manager mutex. Changes should be fired
 * synchronously.
 * @author Jesse Glick
 */
public interface PropertyProvider {

    /**
     * Get all defined properties.
     * The values might contain Ant-style property references.
     * @return all properties defined in this block
     */
    Map<String,String> getProperties();
    
    /**
     * Add a change listener.
     * When the set of available properties, or some of the values, change,
     * this listener should be notified.
     * @param l a listener to add
     */
    void addChangeListener(ChangeListener l);
    
    /**
     * Remove a change listener.
     * @param l a listener to remove
     */
    void removeChangeListener(ChangeListener l);
    
}