org.requs.facet.XsltFuncs Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2014, requs.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 requs.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.requs.facet;
import com.google.common.base.Function;
import com.google.common.collect.Collections2;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Tv;
import com.jcabi.xml.XMLDocument;
import java.util.Collection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.StringUtils;
import org.pegdown.PegDownProcessor;
import org.w3c.dom.Node;
/**
* XSLT functions (utility class, but this is the only option with Saxon).
*
* @author Yegor Bugayenko ([email protected])
* @version $Id$
* @since 1.9
*/
@Immutable
@ToString
@EqualsAndHashCode
public final class XsltFuncs {
/**
* Pattern for printing.
*/
private static final Pattern PTN = Pattern.compile(
"(.*) ", Pattern.DOTALL | Pattern.MULTILINE
);
/**
* Utility class.
*/
private XsltFuncs() {
// empty intentionally
}
/**
* Convert markdown to HTML.
* @param markdown Markdown
* @return HTML
*/
public static String html(final String markdown) {
return new PegDownProcessor().markdownToHtml(markdown);
}
/**
* Seal the method.
* @param xml Xml to seal
* @return Seal as a string
*/
public static String seal(final Node xml) {
final Collection parts = Collections2.transform(
new XMLDocument(xml).xpath("//*/text()"),
new Function() {
@Override
public String apply(final String input) {
return StringEscapeUtils.escapeJava(
input.replaceAll("\\s+", " ")
);
}
}
);
return DigestUtils.md5Hex(
StringUtils.join(parts, "")
).substring(0, Tv.SIX);
}
/**
* Print node content into string.
* @param node Node
* @return XML
*/
public static String print(final Node node) {
final String txt = new XMLDocument(node).nodes("/*").get(0).toString();
final Matcher matcher = XsltFuncs.PTN.matcher(txt);
if (!matcher.matches()) {
throw new IllegalStateException(
String.format("invalid XML node: %s", txt)
);
}
return matcher.group(1);
}
}