https://ant.apache.org/: master POM (The Apache Software Foundation) 
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 *  this work for additional information regarding copyright ownership.
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 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
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package org.apache.tools.ant.taskdefs.condition;

import org.apache.tools.ant.BuildException;


Interface for conditions to use inside the <condition> task.

/**
 * Interface for conditions to use inside the &lt;condition&gt; task.
 *
 */
public interface Condition {
    
Is this condition true?

Throws:
Returns:true if the condition is true
/**
     * Is this condition true?
     * @return true if the condition is true
     * @exception BuildException if an error occurs
     */
    boolean eval() throws BuildException;
}