PatternValidator.java

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package edu.rice.cs.hpc.filter.pattern;

import org.eclipse.jface.dialogs.IInputValidator;

public class PatternValidator implements IInputValidator {

    @Override
    public String isValid(String newText) {

        if (newText == null || newText.length() < 1) {
            return "Pattern cannot be empty.";
        }
        return null;
    }

}