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package org.gnu.glpk;
/**
* Terminal Listener
* <p>GLPK will call method {@link GlpkTerminal#callback(String)
* GlpkTerminal.output} before producing terminal output. A listener can
* inhibit the terminal output by returning <code>false</code> in the
* {@link #output(String) output} routine.
* <p>If a {@link GlpkException GlpkExeption} has occured it is necessary to
* call<pre>
* GLPK.glp_term_hook(null, null);</pre>
* to reenable listening to terminal output.
* @see GlpkTerminal
* @see GlpkException
* @see GLPK#glp_term_hook(SWIGTYPE_p_f_p_void_p_q_const__char__int,
* SWIGTYPE_p_void)
*/
public interface GlpkTerminalListener {
/**
* Receive terminal output.
* <p>The return value controls, if the mesage is displayed in the
* console.
* @param str output string
* @return true if terminal output is requested
*/
boolean output(String str);
}
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