/*******************************************************************************
* Copyright (c) 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
*******************************************************************************/
package org.eclipse.linuxtools.internal.systemtap.ui.ide.preferences;
import org.eclipse.jface.dialogs.IInputValidator;
public class ConditionalExpressionValidator implements IInputValidator {
/**
* Determines whether or not the string is valid within the contraints.
*
* @param s The string to check.
*
* @return The return message.
*/
@Override
public String isValid(String s) {
if(null == s) {
return Messages.ConditionalExpressionValidator_NotNull;
}
if(!s.startsWith("if")) {//$NON-NLS-1$
return Messages.ConditionalExpressionValidator_MustStartWith;
}
if(!s.contains("(")) {//$NON-NLS-1$
return Messages.ConditionalExpressionValidator_MustContain;
}
if(!s.endsWith(")")) {//$NON-NLS-1$
return Messages.ConditionalExpressionValidator_MustEndWith;
}
if(s.length() < 5) {
return Messages.ConditionalExpressionValidator_MustEnterSomething;
}
return null;
}
}