117 lines
3.1 KiB
Java
117 lines
3.1 KiB
Java
package eu.siacs.conversations.xml;
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import android.util.Log;
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import android.util.Xml;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import java.io.Closeable;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import eu.siacs.conversations.Config;
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public class XmlReader implements Closeable {
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private final XmlPullParser parser;
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private InputStream is;
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public XmlReader() {
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this.parser = Xml.newPullParser();
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try {
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this.parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
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} catch (XmlPullParserException e) {
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Log.d(Config.LOGTAG, "error setting namespace feature on parser");
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}
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}
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public void setInputStream(InputStream inputStream) throws IOException {
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if (inputStream == null) {
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throw new IOException();
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}
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this.is = inputStream;
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try {
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parser.setInput(new InputStreamReader(this.is));
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} catch (XmlPullParserException e) {
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throw new IOException("error resetting parser");
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}
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}
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public void reset() throws IOException {
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if (this.is == null) {
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throw new IOException();
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}
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try {
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parser.setInput(new InputStreamReader(this.is));
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} catch (XmlPullParserException e) {
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throw new IOException("error resetting parser");
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}
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}
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@Override
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public void close() {
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this.is = null;
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}
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public Tag readTag() throws IOException {
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try {
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while (this.is != null && parser.next() != XmlPullParser.END_DOCUMENT) {
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if (parser.getEventType() == XmlPullParser.START_TAG) {
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Tag tag = Tag.start(parser.getName());
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final String xmlns = parser.getNamespace();
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for (int i = 0; i < parser.getAttributeCount(); ++i) {
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final String prefix = parser.getAttributePrefix(i);
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String name;
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if (prefix != null && !prefix.isEmpty()) {
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name = prefix+":"+parser.getAttributeName(i);
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} else {
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name = parser.getAttributeName(i);
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}
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tag.setAttribute(name,parser.getAttributeValue(i));
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}
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if (xmlns != null) {
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tag.setAttribute("xmlns", xmlns);
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}
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return tag;
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} else if (parser.getEventType() == XmlPullParser.END_TAG) {
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return Tag.end(parser.getName());
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} else if (parser.getEventType() == XmlPullParser.TEXT) {
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return Tag.no(parser.getText());
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}
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}
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} catch (Throwable throwable) {
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throw new IOException("xml parser mishandled "+throwable.getClass().getSimpleName()+"("+throwable.getMessage()+")", throwable);
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}
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return null;
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}
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public Element readElement(Tag currentTag) throws IOException {
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Element element = new Element(currentTag.getName());
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element.setAttributes(currentTag.getAttributes());
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Tag nextTag = this.readTag();
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if (nextTag == null) {
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throw new IOException("interrupted mid tag");
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}
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if (nextTag.isNo()) {
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element.setContent(nextTag.getName());
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nextTag = this.readTag();
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if (nextTag == null) {
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throw new IOException("interrupted mid tag");
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}
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}
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while (!nextTag.isEnd(element.getName())) {
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if (!nextTag.isNo()) {
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Element child = this.readElement(nextTag);
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element.addChild(child);
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}
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nextTag = this.readTag();
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if (nextTag == null) {
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throw new IOException("interrupted mid tag");
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}
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}
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return element;
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}
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}
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