org.xembly.PiDirective Maven / Gradle / Ivy
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* Copyright (c) 2013-2024, xembly.org
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*
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* the names of its contributors may be used to endorse or promote
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* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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*/
package org.xembly;
import java.util.Locale;
import lombok.EqualsAndHashCode;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
/**
* PI directive.
*
* The class is immutable and thread-safe.
*
* @since 0.9
*/
@EqualsAndHashCode(of = { "target", "data" })
final class PiDirective implements Directive {
/**
* Target name.
*/
private final Arg target;
/**
* Data.
*/
private final Arg data;
/**
* Public ctor.
* @param tgt Target
* @param dat Data
* @throws XmlContentException If invalid input
*/
PiDirective(final String tgt, final String dat)
throws XmlContentException {
this.target = new Arg(tgt.toLowerCase(Locale.ENGLISH));
this.data = new Arg(dat);
}
@Override
public String toString() {
return String.format("PI %s, %s", this.target, this.data);
}
@Override
@SuppressWarnings("aibolit.P13")
public Directive.Cursor exec(final Node dom,
final Directive.Cursor cursor, final Directive.Stack stack) {
final Document doc;
if (dom.getOwnerDocument() == null) {
doc = Document.class.cast(dom);
} else {
doc = dom.getOwnerDocument();
}
final Node instr = doc.createProcessingInstruction(
this.target.raw(), this.data.raw()
);
if (cursor.isEmpty()) {
dom.insertBefore(instr, doc.getDocumentElement());
} else {
for (final Node node : cursor) {
node.appendChild(instr);
}
}
return cursor;
}
}