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/**
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* '$RCSfile$'
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* Purpose: A Class that implements utility methods for a metadata catalog
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones, Jivka Bojilova
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* Release: @release@
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*
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* '$Author: tao $'
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* '$Date: 2003-04-22 09:51:34 -0700 (Tue, 22 Apr 2003) $'
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* '$Revision: 1598 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.File;
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import java.net.URL;
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import java.net.MalformedURLException;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.SQLException;
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import java.util.PropertyResourceBundle;
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import java.util.Hashtable;
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import java.util.Enumeration;
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import java.util.Stack;
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import java.util.Vector;
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import edu.ucsb.nceas.dbadapter.AbstractDatabase;
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/**
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* A suite of utility classes for the metadata catalog server
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*/
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public class MetaCatUtil {
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public static AbstractDatabase dbAdapter;
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private static PropertyResourceBundle options = null;
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private static String propertiesFile = "edu.ucsb.nceas.metacat.metacat";
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private static boolean debug = true;
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//private Hashtable connectionPool = new Hashtable();
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/**
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* Determine our db adapter class and create an instance of that class
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*/
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static {
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try {
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dbAdapter = (AbstractDatabase)createObject(getOption("dbAdapter"));
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} catch (Exception e) {
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System.err.println("Error in MetaCatUtil static block:" + e.getMessage());
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}
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}
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/**
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* Instantiate a class using the name of the class at runtime
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*
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* @param className the fully qualified name of the class to instantiate
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*/
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public static Object createObject(String className) throws Exception {
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Object object = null;
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try {
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Class classDefinition = Class.forName(className);
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object = classDefinition.newInstance();
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} catch (InstantiationException e) {
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throw e;
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} catch (IllegalAccessException e) {
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throw e;
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} catch (ClassNotFoundException e) {
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throw e;
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}
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return object;
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}
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/**
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* Utility method to get an option value from the properties file
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*
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* @param optionName the name of the option requested
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*/
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public static String getOption(String optionName) {
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// Get the configuration file information
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if (options == null) {
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options = (PropertyResourceBundle)
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PropertyResourceBundle.getBundle(propertiesFile);
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}
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String value = (String)options.handleGetObject(optionName);
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return value;
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}
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/**
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* Utility method to get an option value from a properties file
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*
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* @param optionName the name of the option requested
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* @param propFile the name of the file where to get the properties from
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*/
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public String getOption(String optionName, String propFile) {
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// Get the configuration file information
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PropertyResourceBundle options = (PropertyResourceBundle)
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PropertyResourceBundle.getBundle(propFile);
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String value = (String)options.handleGetObject(optionName);
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return value;
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}
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/** Utility method to convert a file handle into a URL */
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public static URL fileToURL(File file)
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{
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String path = file.getAbsolutePath();
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String fSep = System.getProperty("file.separator");
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if (fSep != null && fSep.length() == 1)
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path = path.replace(fSep.charAt(0), '/');
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if (path.length() > 0 && path.charAt(0) != '/')
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path = '/' + path;
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try {
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return new URL("file", null, path);
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}
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catch (java.net.MalformedURLException e) {
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/* According to the spec this could only happen if the file
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protocol were not recognized. */
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throw new Error("unexpected MalformedURLException");
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}
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}
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/**
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* Utility method to parse the query part of a URL into parameters. This
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* method assumes the format of the query par tof the url is an
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* ampersand separated list of name/value pairs, with equal signs separating
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* the name from the value (e.g., name=tom&zip=99801 ). Returns a
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* has of the name value pairs, hashed on name.
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*/
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public static Hashtable parseQuery(String query) throws MalformedURLException
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{
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String[][] params = new String[200][2];
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Hashtable parameters = new Hashtable();
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String temp = "";
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boolean ampflag = true;
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boolean poundflag = false;
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int arrcount = 0;
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if ( query != null ) {
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for (int i=0; i < query.length(); i++) {
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// go throught the remainder of the query one character at a time.
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if (query.charAt(i) == '=') {
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// if the current char is a # then the preceding should be a name
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if (!poundflag && ampflag) {
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params[arrcount][0] = temp.trim();
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temp = "";
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} else {
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//if there are two #s or &s in a row throw an exception.
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throw new MalformedURLException("metacatURL: Two parameter names "+
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"not allowed in sequence");
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}
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poundflag = true;
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ampflag = false;
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} else if (query.charAt(i) == '&' || i == query.length()-1) {
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//the text preceding the & should be the param value.
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if (i == query.length() - 1) {
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//if at the end of the string grab the last value and append it.
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if (query.charAt(i) != '=') {
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//ignore an extra & on the end of the string
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temp += query.charAt(i);
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}
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}
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if (!ampflag && poundflag) {
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params[arrcount][1] = temp.trim();
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parameters.put(params[arrcount][0], params[arrcount][1]);
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temp = "";
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arrcount++; //increment the array to the next row.
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} else {
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//if there are two =s or &s in a row through an exception
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throw new MalformedURLException("metacatURL: Two parameter values "+
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"not allowed in sequence");
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}
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poundflag = false;
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ampflag = true;
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} else {
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//get the next character in the string
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temp += query.charAt(i);
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}
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}
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}
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return parameters;
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}
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/**
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* Utility method to print debugging messages. User can set debug level
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* for this message. The number is fewer, the message is more important
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* @param msg, the content of the message
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* @param debugLevel, an integer indicating the message debug leve
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*/
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public static void debugMessage(String msg, int debugLevel)
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{
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if (debug)
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{
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int limit = 1;
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try
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{
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limit=Integer.parseInt(getOption("debuglevel"));
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}
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catch (Exception e)
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{
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System.out.println(e.getMessage());
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}
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//don't allow the user set debugLevel less than or equals 0
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if (debugLevel<=0)
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{
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debugLevel=1;
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}
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if (debugLevel < limit)
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{
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System.err.println("@debugprefix@ " +msg);
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}
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}
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}
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public static Vector getOptionList(String optiontext)
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{
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Vector options = new Vector();
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if(optiontext.indexOf(",") == -1)
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{
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options.addElement(optiontext);
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return options;
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}
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while(optiontext.indexOf(",") != -1)
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{
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String s = optiontext.substring(0, optiontext.indexOf(","));
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options.addElement(s.trim());
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optiontext = optiontext.substring(optiontext.indexOf(",") + 1,
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optiontext.length());
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if(optiontext.indexOf(",") == -1)
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{ //catch the last list entry
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options.addElement(optiontext.trim());
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}
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}
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return options;
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}
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/** Normalizes the given string. Taken from configXML.java*/
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public static String normalize(String s)
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{
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StringBuffer str = new StringBuffer();
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int len = (s != null) ? s.length() : 0;
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for (int i = 0; i < len; i++)
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{
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char ch = s.charAt(i);
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switch (ch)
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{
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case '<':
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{
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str.append("<");
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break;
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}
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case '>':
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{
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str.append(">");
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break;
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}
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case '&':
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{
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str.append("&");
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break;
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}
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case '"':
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{
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str.append(""");
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break;
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}
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case '\r':
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case '\n':
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{
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// else, default append char
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}
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default:
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{
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str.append(ch);
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}
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}
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}
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return (str.toString());
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}
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/**
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* Get docid from online/url string
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*/
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public static String getDocIdWithRevFromOnlineURL(String url)
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{
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String docid = null;
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String DOCID = "docid";
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boolean find = false;
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char limited = '&';
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int count = 0; //keep track how many & was found
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Vector list = new Vector();// keep index number for &
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if (url == null)
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{
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MetaCatUtil.debugMessage("url is null and null will be returned", 30);
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return docid;
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}
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// the first element in list is 0
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list.add(new Integer(0));
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for (int i=0; i< url.length(); i++)
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{
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if (url.charAt(i) == limited)
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{
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// count plus 1
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count++;
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list.add(new Integer(i));
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// get substring beween two &
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String str = url.substring(((Integer)list.elementAt(count-1)).intValue(), i);
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MetaCatUtil.debugMessage("substring between two & is: " + str, 30);
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//if the subString contains docid, we got it
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if (str.indexOf(DOCID) != -1)
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{
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//get index of '="
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int start = getIndexForGivenChar(str, '=')+1;
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int end = str.length();
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docid = str.substring(start, end);
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find = true;
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}//if
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}//if
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}//for
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//if not find, we need check the subtring between the index of last & and
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// the end of string
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if (!find)
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{
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MetaCatUtil.debugMessage("Checking the last substring", 35);
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String str = url.substring(((Integer)list.elementAt(count)).intValue() +1,
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url.length());
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MetaCatUtil.debugMessage("Last substring is: " + str, 30);
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if (str.indexOf(DOCID) != -1)
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{
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//get index of '="
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int start = getIndexForGivenChar(str, '=')+1;
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int end = str.length();
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docid = str.substring(start, end);
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find = true;
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}//if
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}//if
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MetaCatUtil.debugMessage("The docid from online url is:"+ docid, 30);
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return docid.trim();
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}
|
366
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|
367
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private static int getIndexForGivenChar(String str, char character)
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368
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{
|
369
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int index = -1;
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// make sure str is not null
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if(str == null)
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{
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373
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MetaCatUtil.debugMessage("The given str is null and -1 will be returned",
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30);
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return index;
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}
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// got though the string
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378
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for (int i=0; i<str.length(); i++)
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379
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{
|
380
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// find the first one then break the loop
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381
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if (str.charAt(i) == character)
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382
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{
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383
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index = i;
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384
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break;
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385
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}//if
|
386
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}//for
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387
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MetaCatUtil.debugMessage("the index for char "+ character +
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388
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" is: "+index, 30);
|
389
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return index;
|
390
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}
|
391
|
|
392
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/**
|
393
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* Utility method to get docid from a given string
|
394
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* @param string, the given string should be these two format:
|
395
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* 1) str1.str2 in this case docid= str1.str2
|
396
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* 2) str1.str2.str3, in this case docid =str1.str2
|
397
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* @param the sperator char
|
398
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*/
|
399
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public static String getDocIdFromString(String str)
|
400
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{
|
401
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String docId = null;
|
402
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if (str == null)
|
403
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{
|
404
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MetaCatUtil.debugMessage("The given str is null and null will be returned"
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405
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+" in getDocIdfromString", 30);
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406
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return docId;
|
407
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} //make sure docid is not null
|
408
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int dotNumber = 0;//count how many dots in given string
|
409
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int indexOfLastDot = 0;
|
410
|
|
411
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//assume that seperator is one charactor string
|
412
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char seperator=getOption("accNumSeparator").charAt(0);
|
413
|
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414
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for (int i=0; i<str.length(); i++)
|
415
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{
|
416
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if ( str.charAt(i)==seperator)
|
417
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{
|
418
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dotNumber++;//count how many dots
|
419
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indexOfLastDot=i;//keep the last dot postion
|
420
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}
|
421
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}//for
|
422
|
|
423
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//The string formatt is wrong, because it has more than two or less than
|
424
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//one seperator
|
425
|
if ( dotNumber>2 || dotNumber < 1)
|
426
|
{
|
427
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docId=null;
|
428
|
}
|
429
|
else if (dotNumber == 2) //the case for str1.str2.str3
|
430
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{
|
431
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docId=str.substring(0, indexOfLastDot);
|
432
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}
|
433
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else if (dotNumber == 1) //the case for str1.str2
|
434
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{
|
435
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docId=str;
|
436
|
}
|
437
|
|
438
|
return docId;
|
439
|
}//getDocIdFromString
|
440
|
|
441
|
/**
|
442
|
* Utility method to get version number from a given string
|
443
|
* @param string, the given string should be these two format:
|
444
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* 1) str1.str2(no version) version =-1;
|
445
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* 2) str1.str2.str3, in this case version = str3;
|
446
|
* 3) other, vresion =-2
|
447
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*/
|
448
|
public static int getVersionFromString(String str)
|
449
|
throws NumberFormatException
|
450
|
{
|
451
|
int version=-1;
|
452
|
String versionString=null;
|
453
|
int dotNumber = 0;//count how many dots in given string
|
454
|
int indexOfLastDot = 0;
|
455
|
|
456
|
//assume that seperator is one charactor string
|
457
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char seperator=getOption("accNumSeparator").charAt(0);
|
458
|
|
459
|
for (int i=0; i<str.length(); i++)
|
460
|
{
|
461
|
if ( str.charAt(i)==seperator)
|
462
|
{
|
463
|
dotNumber++;//count how many dots
|
464
|
indexOfLastDot=i;//keep the last dot postion
|
465
|
}
|
466
|
}//for
|
467
|
|
468
|
//The string formatt is wrong, because it has more than two or less than
|
469
|
//one seperator
|
470
|
if ( dotNumber>2 || dotNumber < 1)
|
471
|
{
|
472
|
version=-2;
|
473
|
}
|
474
|
else if (dotNumber == 2 && (indexOfLastDot != (str.length() -1)))
|
475
|
//the case for str1.str2.str3
|
476
|
{
|
477
|
versionString=str.substring((indexOfLastDot+1), str.length());
|
478
|
version=Integer.parseInt(versionString);
|
479
|
}
|
480
|
else if (dotNumber == 1) //the case for str1.str2
|
481
|
{
|
482
|
version=-1;
|
483
|
}
|
484
|
|
485
|
return version;
|
486
|
}//getVersionFromString
|
487
|
|
488
|
|
489
|
/**
|
490
|
* Utility method to get version string from a given string
|
491
|
* @param string, the given string should be these two format:
|
492
|
* 1) str1.str2(no version) version=null;
|
493
|
* 2) str1.str2.str3, in this case version = str3;
|
494
|
* 3) other, vresion =null;
|
495
|
*/
|
496
|
public static String getRevisionStringFromString(String str)
|
497
|
throws NumberFormatException
|
498
|
{
|
499
|
// String to store the version
|
500
|
String versionString=null;
|
501
|
int dotNumber = 0;//count how many dots in given string
|
502
|
int indexOfLastDot = 0;
|
503
|
|
504
|
//assume that seperator is one charactor string
|
505
|
char seperator=getOption("accNumSeparator").charAt(0);
|
506
|
|
507
|
for (int i=0; i<str.length(); i++)
|
508
|
{
|
509
|
if ( str.charAt(i)==seperator)
|
510
|
{
|
511
|
dotNumber++;//count how many dots
|
512
|
indexOfLastDot=i;//keep the last dot postion
|
513
|
}
|
514
|
}//for
|
515
|
|
516
|
//The string formatt is wrong, because it has more than two or less than
|
517
|
//one seperator
|
518
|
if ( dotNumber>2 || dotNumber < 1)
|
519
|
{
|
520
|
versionString = null;
|
521
|
}
|
522
|
else if (dotNumber == 2 && (indexOfLastDot != (str.length() -1)))
|
523
|
{
|
524
|
//the case for str1.str2.str3
|
525
|
// indexOfLastDot != (str.length() -1) means get rid of str1.str2.
|
526
|
versionString=str.substring((indexOfLastDot+1), str.length());
|
527
|
}
|
528
|
else if (dotNumber == 1) //the case for str1.str2 or str1.str2.
|
529
|
{
|
530
|
versionString=null;
|
531
|
}
|
532
|
|
533
|
return versionString;
|
534
|
}//getVersionFromString
|
535
|
|
536
|
/**
|
537
|
* Method to get the name of local replication server
|
538
|
*/
|
539
|
public static String getLocalReplicationServerName()
|
540
|
{
|
541
|
String replicationServerName=null;
|
542
|
String serverHost=null;
|
543
|
serverHost=getOption("server");
|
544
|
// append "context/servelet/replication" to the host name
|
545
|
replicationServerName=serverHost+getOption("replicationpath");
|
546
|
return replicationServerName;
|
547
|
|
548
|
}
|
549
|
|
550
|
/**
|
551
|
* Method to get docidwithrev from eml2 inline data id
|
552
|
* The eml inline data id would look like eml.200.2.3
|
553
|
*/
|
554
|
public static String getDocIdWithoutRevFromInlineDataID(String inlineDataID)
|
555
|
{
|
556
|
String docidWithoutRev = null;
|
557
|
if ( inlineDataID == null)
|
558
|
{
|
559
|
return docidWithoutRev;
|
560
|
}
|
561
|
String seperator = MetaCatUtil.getOption("accNumSeparator");
|
562
|
char charSeperator = seperator.charAt(0);
|
563
|
int targetNumberOfSeperator = 2;// we want to know his index
|
564
|
int numberOfSeperator = 0;
|
565
|
for (int i = 0; i< inlineDataID.length(); i++)
|
566
|
{
|
567
|
// meet seperator, increase number of seperator
|
568
|
if (inlineDataID.charAt(i) == charSeperator)
|
569
|
{
|
570
|
numberOfSeperator++;
|
571
|
}
|
572
|
// if number of seperator reach the target one, record the index(i)
|
573
|
// and get substring and terminate the loop
|
574
|
if ( numberOfSeperator == targetNumberOfSeperator)
|
575
|
{
|
576
|
docidWithoutRev = inlineDataID.substring(0, i);
|
577
|
break;
|
578
|
}
|
579
|
}
|
580
|
|
581
|
MetaCatUtil.debugMessage("Docid without rev from inlinedata id: " +
|
582
|
docidWithoutRev, 35);
|
583
|
return docidWithoutRev;
|
584
|
|
585
|
}
|
586
|
|
587
|
/**
|
588
|
* Revise stack change a stack to opposite order
|
589
|
*/
|
590
|
public static Stack reviseStack(Stack stack)
|
591
|
{
|
592
|
Stack result = new Stack();
|
593
|
// make sure the parameter is correct
|
594
|
if (stack == null || stack.isEmpty())
|
595
|
{
|
596
|
result = stack;
|
597
|
return result;
|
598
|
}
|
599
|
|
600
|
while (!stack.isEmpty())
|
601
|
{
|
602
|
Object obj = stack.pop();
|
603
|
result.push(obj);
|
604
|
}
|
605
|
return result;
|
606
|
}
|
607
|
|
608
|
/** A method to replace whitespace in url*/
|
609
|
public static String replaceWhiteSpaceForURL(String urlHasWhiteSpace)
|
610
|
{
|
611
|
StringBuffer newUrl = new StringBuffer();
|
612
|
String whiteSpaceReplace ="%20";
|
613
|
if (urlHasWhiteSpace == null || urlHasWhiteSpace.trim().equals(""))
|
614
|
{
|
615
|
return null;
|
616
|
}
|
617
|
|
618
|
for (int i=0; i<urlHasWhiteSpace.length(); i++)
|
619
|
{
|
620
|
char ch = urlHasWhiteSpace.charAt(i);
|
621
|
if ( !Character.isWhitespace(ch))
|
622
|
{
|
623
|
newUrl.append(ch);
|
624
|
}
|
625
|
else
|
626
|
{
|
627
|
//it is white sapce, replace it by %20
|
628
|
newUrl = newUrl.append(whiteSpaceReplace);
|
629
|
}
|
630
|
|
631
|
}//for
|
632
|
MetaCatUtil.debugMessage("The new string without space is:"+
|
633
|
newUrl.toString(), 35);
|
634
|
return newUrl.toString();
|
635
|
|
636
|
}// replaceWhiteSpaceForUR
|
637
|
|
638
|
}
|