Example usage for org.apache.commons.lang StringUtils indexOfDifference

Introduction

In this page you can find the example usage for org.apache.commons.lang StringUtils indexOfDifference.

Prototype

public static int indexOfDifference(String[] strs) 

Source Link

Document

Compares all Strings in an array and returns the index at which the Strings begin to differ.

Usage

From source file:org.overlord.sramp.shell.TabCompleter.java

/**
 * Merge candidates.//from w  ww.  java  2s . c  o  m
 *
 * @param completionCandidates
 *            the completion candidates
 * @param buffer
 *            the buffer
 * @return the string
 */
private String mergeCandidates(List<String> completionCandidates, String buffer) {
    if (completionCandidates.size() > 1) {
        int indexOfDifference = StringUtils
                .indexOfDifference(completionCandidates.toArray(new String[completionCandidates.size()]));
        if (indexOfDifference == -1) {
            return completionCandidates.get(0);
        } else {
            String partToCompare = ""; //$NON-NLS-1$
            String commonPart = completionCandidates.get(0).substring(0, indexOfDifference);
            if (commonPart.startsWith(buffer)) {
                partToCompare = buffer;
            } else {
                partToCompare = buffer.substring(buffer.lastIndexOf(" ") + 1); //$NON-NLS-1$
            }
            if (partToCompare.length() != indexOfDifference) {
                return commonPart;
            }

        }
    }
    return ""; //$NON-NLS-1$

}

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