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package org.netbeans.api.debugger;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
/**
* Abstract definition of watch. Each watch is created for
* one String which contains the name of variable or some expression.
*
* @author Jan Jancura
*/
public final class Watch {
/** Name of the property for the watched expression. */
public static final String PROP_EXPRESSION = "expression"; // NOI18N
/** Name of the property for the value of the watched expression. This constant is not used at all. */
public static final String PROP_VALUE = "value"; // NOI18N
private String expression;
private PropertyChangeSupport pcs;
Watch (String expr) {
this.expression = expr;
pcs = new PropertyChangeSupport (this);
}
/**
* Return expression this watch is created for.
*
* @return expression this watch is created for
*/
public String getExpression () {
return expression;
}
/**
* Set the expression to watch.
*
* @param expression expression to watch
*/
public void setExpression (String expression) {
String old = this.expression;
this.expression = expression;
pcs.firePropertyChange (PROP_EXPRESSION, old, expression);
}
/**
* Remove the watch from the list of all watches in the system.
*/
public void remove () {
DebuggerManager dm = DebuggerManager.getDebuggerManager ();
dm.removeWatch (this);
}
/**
* Add a property change listener.
*
* @param l the listener to add
*/
public void addPropertyChangeListener (PropertyChangeListener l) {
pcs.addPropertyChangeListener (l);
}
/**
* Remove a property change listener.
*
* @param l the listener to remove
*/
public void removePropertyChangeListener (PropertyChangeListener l) {
pcs.removePropertyChangeListener (l);
}
}
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