/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* 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.teiid.query.sql;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
/**
* This is the primary interface for all language objects. It extends a few
* key interfaces and adds some additional methods to allow the {@link LanguageVisitor}
* to work.
*/
public interface LanguageObject extends Cloneable {
/**
* Method for accepting a visitor. It is the responsibility of the
* language object to call back on the visitor.
* @param visitor Visitor being used
*/
void acceptVisitor(LanguageVisitor visitor);
/**
* Implement clone to make objects cloneable.
* @return Deep clone of this object
*/
Object clone();
public static class Util {
public static <S extends LanguageObject, T extends S> ArrayList<S> deepClone(Collection<T> collection, Class<S> type) {
if (collection == null) {
return null;
}
ArrayList<S> result = new ArrayList<S>(collection.size());
for (LanguageObject obj : collection) {
result.add(type.cast(obj.clone()));
}
return result;
}
@SuppressWarnings("unchecked")
public static <T extends LanguageObject> T[] deepClone(T[] collection) {
if (collection == null) {
return null;
}
T[] copy = Arrays.copyOf(collection, collection.length);
for (int i = 0; i < copy.length; i++) {
LanguageObject t = copy[i];
copy[i] = (T) t.clone();
}
return copy;
}
}
}