Util.java
/*
* Copyright (C) 2003-2010 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.exoplatform.social.common.jcr;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.jcr.Value;
import org.apache.commons.lang.Validate;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
/**
* Provides utility for working with jcr
*
* @author <a href="http://hoatle.net">hoatle (hoatlevan at gmail dot com)</a>
* @since Dec 22, 2010
* @since 1.2.0-GA
*/
public class Util {
/**
* The logger
*/
private static final Log LOG = ExoLogger.getLogger(Util.class);
/**
* Gets properties name pattern from an array of property names.
*
* @param propertyNames
* @return properties name pattern.
*/
public static String getPropertiesNamePattern(String[] propertyNames) {
Validate.notEmpty(propertyNames, "propertyNames must not be empty");
StringBuilder sb = new StringBuilder(256);
sb.append(propertyNames[0]);
for (int i = 1; i < propertyNames.length; i++) {
sb.append('|').append(propertyNames[i]);
}
return sb.toString();
}
/**
* Converts array of Value to array of string.
* Make sure these Values can getString().
*
* @param values
* @return
* @throws Exception
*/
public static String[] convertValuesToStrings(Value[] values) throws Exception {
if (values.length == 1) {
return new String[]{values[0].getString()};
}
String[] strArray = new String[values.length];
for (int i = 0; i < values.length; ++i) {
strArray[i] = values[i].getString();
}
return strArray;
}
/**
* Convert a map of string key and string value into a string array
* where values are in the form key=value.
*
* @param templateParams
* @return
*/
public static String[] convertMapToStrings(Map<String, String> templateParams) {
if (templateParams == null) {
return null;
}
Set<String> keys = templateParams.keySet();
String [] result = new String[keys.size()];
int i = 0;
for (String key : keys) {
result[i++] = key + "=" + templateParams.get(key);
}
return result;
}
/**
* Converts an array of {@link Value} into a map of string.
* The values are expected to be of string type and in the form key=value
*
* @param values
* @return
*/
public static Map<String, String> convertValuesToMap(Value[] values) {
if (values == null) {
return null;
}
Map<String, String> result = new HashMap<String, String>();
for (Value value : values) {
try {
String val = value.getString();
int equalIndex = val.indexOf("=");
if (equalIndex > 0) {
result.put(val.split("=")[0], val.substring(equalIndex + 1));
}
} catch (Exception e) {
LOG.warn(e.getMessage(), e);
}
}
return result;
}
/**
* Converts a list to an array.
*
* @param list List to be converted to array.
* @param type Type of list's and array's element.
* @return An array with the same type of element in list.
*/
public static <T> T[] convertListToArray(List<T> list, Class<T> type) {
return list.toArray((T[])java.lang.reflect.Array.newInstance(type, list.size()));
}
}