org.xembly.UpDirective Maven / Gradle / Ivy
/**
* Copyright (c) 2013-2015, xembly.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met: 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer. 2) Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution. 3) Neither the name of the xembly.org nor
* the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.xembly;
import com.jcabi.aspects.Immutable;
import java.util.Collection;
import java.util.HashSet;
import lombok.EqualsAndHashCode;
import org.w3c.dom.Node;
/**
* UP directive.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id$
* @since 0.1
*/
@Immutable
@EqualsAndHashCode
final class UpDirective implements Directive {
@Override
public String toString() {
return "UP";
}
@Override
public Directive.Pointer exec(final Node dom,
final Directive.Pointer ptr, final Directive.Stack stack)
throws ImpossibleModificationException {
final Collection parents = new HashSet(ptr.size());
for (final Node node : ptr) {
final Node parent = node.getParentNode();
if (parent == null) {
throw new ImpossibleModificationException(
String.format(
"there is no parent node of '%s' (%s), can't go UP",
node.getNodeName(), node.getNodeType()
)
);
}
parents.add(parent);
}
return new DomPointer(parents);
}
}