create a path from an array of components - Java File Path IO

Java examples for File Path IO:Path

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Description

create a path from an array of components

Demo Code


import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

public class Main{
    public static final String SEPARATOR = "/";
    /**/*from  w w  w.j av  a2 s  .  c o m*/
     * create a path from an array of components
     * @param components
     * @return
     */
    public static Path pathFromComponents(String[] components) {
        if (null == components || components.length == 0) {
            return null;
        }
        return new PathImpl(pathStringFromComponents(components));
    }
    /**
     * create a path from an array of components
     * @param components
     * @return
     */
    public static String pathStringFromComponents(String[] components) {
        if (null == components || components.length == 0) {
            return null;
        }
        return cleanPath(join(components, SEPARATOR));
    }
    /**
     * Clean the path string by removing leading and trailing slashes and removing duplicate slashes.
     * @param path input path
     * @return cleaned path string
     */
    public static String cleanPath(String path) {
        if (path.endsWith(SEPARATOR)) {
            path = path.replaceAll(SEPARATOR + "+$", "");
        }
        if (path.startsWith(SEPARATOR)) {
            path = path.replaceAll("^" + SEPARATOR + "+", "");
        }
        return path.replaceAll("/+", SEPARATOR);
    }
    private static String join(String[] components, String sep) {
        StringBuilder sb = new StringBuilder();
        for (String component : components) {
            if (sb.length() > 0) {
                sb.append(sep);
            }
            sb.append(component);
        }
        return sb.toString();
    }
}

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