/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.syntax;
import java.util.HashSet;
import java.util.Set;
import org.jnode.nanoxml.XMLElement;
/**
* This is the base class for Syntax classes that compose other Syntaxes. The
* interesting behavior (e.g. the {@link Syntax#prepare(ArgumentBundle)} method) is implemented
* in child classes.
*
* @author crawley@jnode.org
*/
public abstract class GroupSyntax extends Syntax {
private static Syntax MY_EMPTY = new EmptySyntax(null, null);
final Syntax[] syntaxes;
private final HashSet<String> childLabels;
public GroupSyntax(String label, String description, Syntax...syntaxes) {
super(label, description);
this.syntaxes = syntaxes;
this.childLabels = new HashSet<String>();
for (Syntax syntax : syntaxes) {
childLabels.addAll(syntax.childLabels());
syntax.setParent(this);
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("label='").append(label).append("', children=[");
for (int i = 0; i < syntaxes.length; i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(syntaxes[i]);
}
sb.append("]");
return sb.toString();
}
@Override
public Set<String> childLabels() {
return childLabels;
}
@Override
public Syntax[] getChildren() {
return this.syntaxes;
}
@Override
public XMLElement basicElement(String name) {
XMLElement element = super.basicElement(name);
for (Syntax child : this.syntaxes) {
element.addChild((child == null ? MY_EMPTY : child).toXML());
}
return element;
}
}