1.1 --- a/java/alt2xml-lib-output/src/cz/frantovo/alt2xml/out/AbstractAction.java Wed Sep 03 19:53:14 2014 +0200
1.2 +++ b/java/alt2xml-lib-output/src/cz/frantovo/alt2xml/out/AbstractAction.java Thu Sep 04 00:39:11 2014 +0200
1.3 @@ -20,6 +20,9 @@
1.4 /**
1.5 * Recommended base class for Actions.
1.6 *
1.7 + * @see AbstractHandlerAction
1.8 + * @see AbstractDOMAction
1.9 + *
1.10 * @author Ing. František Kučera (frantovo.cz)
1.11 */
1.12 public abstract class AbstractAction implements Action {
2.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
2.2 +++ b/java/alt2xml-lib-output/src/cz/frantovo/alt2xml/out/AbstractDOMAction.java Thu Sep 04 00:39:11 2014 +0200
2.3 @@ -0,0 +1,65 @@
2.4 +/**
2.5 + * Alt2XML
2.6 + * Copyright © 2014 František Kučera (frantovo.cz)
2.7 + *
2.8 + * This program is free software: you can redistribute it and/or modify
2.9 + * it under the terms of the GNU General Public License as published by
2.10 + * the Free Software Foundation, either version 3 of the License, or
2.11 + * (at your option) any later version.
2.12 + *
2.13 + * This program is distributed in the hope that it will be useful,
2.14 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
2.15 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2.16 + * GNU General Public License for more details.
2.17 + *
2.18 + * You should have received a copy of the GNU General Public License
2.19 + * along with this program. If not, see <http://www.gnu.org/licenses/>.
2.20 + */
2.21 +package cz.frantovo.alt2xml.out;
2.22 +
2.23 +import javax.xml.parsers.SAXParser;
2.24 +import javax.xml.transform.Transformer;
2.25 +import javax.xml.transform.TransformerException;
2.26 +import javax.xml.transform.TransformerFactory;
2.27 +import javax.xml.transform.TransformerFactoryConfigurationError;
2.28 +import javax.xml.transform.dom.DOMResult;
2.29 +import javax.xml.transform.sax.SAXSource;
2.30 +import org.xml.sax.InputSource;
2.31 +import org.xml.sax.SAXException;
2.32 +
2.33 +/**
2.34 + * Recommended base class for Actions based on DOM processing.
2.35 + * This actiond does not support streaming – whole document must be parsed/converted to DOM and
2.36 + * after that the action is executed.
2.37 + *
2.38 + * @author Ing. František Kučera (frantovo.cz)
2.39 + */
2.40 +public abstract class AbstractDOMAction extends AbstractAction {
2.41 +
2.42 + public AbstractDOMAction(ActionContext actionContext) {
2.43 + super(actionContext);
2.44 + }
2.45 +
2.46 + @Override
2.47 + public void run(SAXParser parser, InputSource source) throws OutputActionException {
2.48 +
2.49 + try {
2.50 + TransformerFactory tf = TransformerFactory.newInstance();
2.51 + Transformer t = tf.newTransformer();
2.52 +
2.53 + DOMResult domResult = new DOMResult();
2.54 +
2.55 + t.transform(new SAXSource(parser.getXMLReader(), source), domResult);
2.56 +
2.57 + run(domResult);
2.58 +
2.59 + } catch (SAXException e) {
2.60 + throw new OutputActionException("Unable to get SAX reader during SAX→DOM conversion.", e);
2.61 + } catch (TransformerException | TransformerFactoryConfigurationError e) {
2.62 + throw new OutputActionException("Unable to convert SAX events to DOM using XSLT.", e);
2.63 + }
2.64 + }
2.65 +
2.66 + protected abstract void run(DOMResult domResult) throws OutputActionException;
2.67 +
2.68 +}
3.1 --- a/java/alt2xml-lib-output/src/cz/frantovo/alt2xml/out/Action.java Wed Sep 03 19:53:14 2014 +0200
3.2 +++ b/java/alt2xml-lib-output/src/cz/frantovo/alt2xml/out/Action.java Thu Sep 04 00:39:11 2014 +0200
3.3 @@ -23,6 +23,8 @@
3.4 /**
3.5 * Executive class of an output module.
3.6 *
3.7 + * @see AbstractAction
3.8 + *
3.9 * @author Ing. František Kučera (frantovo.cz)
3.10 */
3.11 public interface Action {
4.1 --- a/java/alt2xml-out-xpath/src/cz/frantovo/alt2xml/out/xpath/XPathAction.java Wed Sep 03 19:53:14 2014 +0200
4.2 +++ b/java/alt2xml-out-xpath/src/cz/frantovo/alt2xml/out/xpath/XPathAction.java Thu Sep 04 00:39:11 2014 +0200
4.3 @@ -17,25 +17,49 @@
4.4 */
4.5 package cz.frantovo.alt2xml.out.xpath;
4.6
4.7 -import cz.frantovo.alt2xml.out.AbstractAction;
4.8 +import cz.frantovo.alt2xml.out.AbstractDOMAction;
4.9 import cz.frantovo.alt2xml.out.ActionContext;
4.10 import cz.frantovo.alt2xml.out.OutputActionException;
4.11 -import javax.xml.parsers.SAXParser;
4.12 -import org.xml.sax.InputSource;
4.13 +import java.io.PrintWriter;
4.14 +import javax.xml.transform.dom.DOMResult;
4.15 +import javax.xml.xpath.XPath;
4.16 +import javax.xml.xpath.XPathExpression;
4.17 +import javax.xml.xpath.XPathExpressionException;
4.18 +import javax.xml.xpath.XPathFactory;
4.19 +import org.w3c.dom.Node;
4.20
4.21 /**
4.22 *
4.23 * @author Ing. František Kučera (frantovo.cz)
4.24 */
4.25 -public class XPathAction extends AbstractAction {
4.26 +public class XPathAction extends AbstractDOMAction {
4.27
4.28 public XPathAction(ActionContext actionContext) {
4.29 super(actionContext);
4.30 }
4.31
4.32 @Override
4.33 - public void run(SAXParser parser, InputSource source) throws OutputActionException {
4.34 - // TODO: XPath
4.35 - throw new UnsupportedOperationException("Not supported yet.");
4.36 + public void run(DOMResult domResult) throws OutputActionException {
4.37 +
4.38 + // TODO: reuse
4.39 + XPathFactory xpf = XPathFactory.newInstance();
4.40 + XPath xp = xpf.newXPath();
4.41 +
4.42 + // String expressionString = getActionContext().
4.43 + String expressionString = "1+1";
4.44 + expressionString = "//property[@name='ccc']";
4.45 +
4.46 + try {
4.47 + XPathExpression xpe = xp.compile(expressionString);
4.48 +
4.49 + String result = xpe.evaluate(domResult.getNode());
4.50 +
4.51 + try (PrintWriter out = new PrintWriter(getActionContext().getOutputStream())) {
4.52 + out.println(result);
4.53 + }
4.54 +
4.55 + } catch (XPathExpressionException e) {
4.56 + throw new OutputActionException("Unable to compile or evaluate XPath: " + expressionString, e);
4.57 + }
4.58 }
4.59 }