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ProcessPage.java
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ProcessPage.java
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/**
* Back 2 Browser Bytecode Translator
* Copyright (C) 2012-2018 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. Look for COPYING file in the top folder.
* If not, see http://opensource.org/licenses/GPL-2.0.
*/
package org.apidesign.bck2brwsr.htmlpage;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apidesign.bck2brwsr.core.ExtraJavaScript;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
@ExtraJavaScript(processByteCode = false, resource = "")
class ProcessPage {
private final Map<String,String> ids2Elems = new TreeMap<String, String>();
public Set<String> ids() {
return Collections.unmodifiableSet(ids2Elems.keySet());
}
public String tagNameForId(String id) {
return ids2Elems.get(id);
}
public static ProcessPage readPage(InputStream is) throws IOException {
DocumentBuilderFactory f = DocumentBuilderFactory.newInstance();
f.setValidating(false);
f.setIgnoringComments(true);
Document doc = null;
try {
DocumentBuilder b = f.newDocumentBuilder();
doc = b.parse(is);
} catch (IOException ex) {
throw ex;
} catch (Exception e) {
throw new IOException(e);
}
Element root = doc.getDocumentElement();
ProcessPage pp = new ProcessPage();
pp.seekForIds(root);
return pp;
}
private void seekForIds(Element e) {
String val = e.getAttribute("id");
if (val != null && !val.isEmpty()) {
String prev = ids2Elems.put(val, e.getTagName());
}
NodeList arr = e.getChildNodes();
for (int i = 0; i < arr.getLength(); i++) {
final Node n = arr.item(i);
if (n instanceof Element) {
seekForIds((Element)n);
}
}
}
}