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109 lines (109 loc) · 3.74 KB
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Copy path2_08_StAX.patch
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109 lines (109 loc) · 3.74 KB
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Index: src/main/java/ru/javaops/masterjava/xml/util/StaxStreamProcessor.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/main/java/ru/javaops/masterjava/xml/util/StaxStreamProcessor.java (revision )
+++ src/main/java/ru/javaops/masterjava/xml/util/StaxStreamProcessor.java (revision )
@@ -0,0 +1,56 @@
+package ru.javaops.masterjava.xml.util;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.events.XMLEvent;
+import java.io.InputStream;
+
+public class StaxStreamProcessor implements AutoCloseable {
+ private static final XMLInputFactory FACTORY = XMLInputFactory.newInstance();
+
+ private final XMLStreamReader reader;
+
+ public StaxStreamProcessor(InputStream is) throws XMLStreamException {
+ reader = FACTORY.createXMLStreamReader(is);
+ }
+
+ public XMLStreamReader getReader() {
+ return reader;
+ }
+
+ public boolean doUntil(int stopEvent, String value) throws XMLStreamException {
+ while (reader.hasNext()) {
+ int event = reader.next();
+ if (event == stopEvent) {
+ if (value.equals(getValue(event))) {
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+
+ public String getValue(int event) throws XMLStreamException {
+ return (event == XMLEvent.CHARACTERS) ? reader.getText() : reader.getLocalName();
+ }
+
+ public String getElementValue(String element) throws XMLStreamException {
+ return doUntil(XMLEvent.START_ELEMENT, element) ? reader.getElementText() : null;
+ }
+
+ public String getText() throws XMLStreamException {
+ return reader.getElementText();
+ }
+
+ @Override
+ public void close() {
+ if (reader != null) {
+ try {
+ reader.close();
+ } catch (XMLStreamException e) {
+ // empty
+ }
+ }
+ }
+}
Index: src/test/java/ru/javaops/masterjava/xml/util/StaxStreamProcessorTest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/test/java/ru/javaops/masterjava/xml/util/StaxStreamProcessorTest.java (revision )
+++ src/test/java/ru/javaops/masterjava/xml/util/StaxStreamProcessorTest.java (revision )
@@ -0,0 +1,36 @@
+package ru.javaops.masterjava.xml.util;
+
+import com.google.common.io.Resources;
+import org.junit.Test;
+
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.events.XMLEvent;
+
+public class StaxStreamProcessorTest {
+ @Test
+ public void readCities() throws Exception {
+ try (StaxStreamProcessor processor =
+ new StaxStreamProcessor(Resources.getResource("payload.xml").openStream())) {
+ XMLStreamReader reader = processor.getReader();
+ while (reader.hasNext()) {
+ int event = reader.next();
+ if (event == XMLEvent.START_ELEMENT) {
+ if ("City".equals(reader.getLocalName())) {
+ System.out.println(reader.getElementText());
+ }
+ }
+ }
+ }
+ }
+
+ @Test
+ public void readCities2() throws Exception {
+ try (StaxStreamProcessor processor =
+ new StaxStreamProcessor(Resources.getResource("payload.xml").openStream())) {
+ String city;
+ while ((city = processor.getElementValue("City")) != null) {
+ System.out.println(city);
+ }
+ }
+ }
+}
\ No newline at end of file