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AddIfDirective.java
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AddIfDirective.java
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/*
* Copyright (c) 2013-2022, 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 java.util.ArrayList;
import java.util.Collection;
import lombok.EqualsAndHashCode;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* ADDIF directive.
*
* <p>The class is immutable and thread-safe.
*
* @since 0.1
*/
@EqualsAndHashCode(of = "name")
final class AddIfDirective implements Directive {
/**
* Name of node to add.
*/
private final transient Arg name;
/**
* Public ctor.
* @param node Name of node to add
* @throws XmlContentException If invalid input
*/
AddIfDirective(final String node) throws XmlContentException {
this.name = new Arg(node);
}
@Override
public String toString() {
return String.format("ADDIF %s", this.name);
}
@Override
@SuppressWarnings("aibolit.P32")
public Directive.Cursor exec(final Node dom,
final Directive.Cursor cursor, final Directive.Stack stack) {
final Collection<Node> targets = new ArrayList<>(cursor.size());
final String label = this.name.raw();
for (final Node node : cursor) {
final NodeList kids = node.getChildNodes();
Node target = null;
final int len = kids.getLength();
for (int idx = 0; idx < len; ++idx) {
if (kids.item(idx).getNodeName()
.compareToIgnoreCase(label) == 0) {
target = kids.item(idx);
break;
}
}
if (target == null) {
final Document doc;
if (dom.getOwnerDocument() == null) {
doc = Document.class.cast(dom);
} else {
doc = dom.getOwnerDocument();
}
target = doc.createElement(this.name.raw());
node.appendChild(target);
}
targets.add(target);
}
return new DomCursor(targets);
}
}