How to use

org.apache.tools.ant.types.PropertySet

constructor

/**
 * If the prefix is set, then only properties which start with this
 * prefix string will be recorded. If regex is not set and  if this
 * is never set, or it is set to an empty string or <tt>null</tt>,
 * then all properties will be recorded.
 *
 * <p>For example, if the attribute is set as:</p>
 * <pre>&lt;echoproperties  prefix="ant." /&gt;</pre>
 * then the property "ant.home" will be recorded, but "ant-example"
 * will not.
 *
 * @param  prefix  The new prefix value
 */
public void setPrefix(String prefix) {
  if (prefix != null && !prefix.isEmpty()) {
    this.prefix = prefix;
    PropertySet ps = new PropertySet();
    ps.setProject(getProject());
    ps.appendPrefix(prefix);
    addPropertyset(ps);
  }
}

/**
 * If the regex is set, then only properties whose names match it
 * will be recorded.  If prefix is not set and if this is never set,
 * or it is set to an empty string or <tt>null</tt>, then all
 * properties will be recorded.
 *
 * <p>For example, if the attribute is set as:</p>
 * <pre>&lt;echoproperties  prefix=".*ant.*" /&gt;</pre>
 * then the properties "ant.home" and "user.variant" will be recorded,
 * but "ant-example" will not.
 *
 * @param  regex  The new regex value
 *
 * @since Ant 1.7
 */
public void setRegex(String regex) {
  if (regex != null && !regex.isEmpty()) {
    this.regex = regex;
    PropertySet ps = new PropertySet();
    ps.setProject(getProject());
    ps.appendRegex(regex);
    addPropertyset(ps);
  }
}

PropertySet ps = new PropertySet();
PropertySet.BuiltinPropertySetName sys = new PropertySet.BuiltinPropertySetName();
sys.setValue("system");

public PropertySet createPropertyset() {
  if (propertyset == null) {
    propertyset = new PropertySet();
  }
  return propertyset;
}

public PropertySet createPropertyset() {
  if (propertyset == null) {
    propertyset = new PropertySet();
  }
  return propertyset;
}