From 250b125774c089983db95f62e82995c39b04017d Mon Sep 17 00:00:00 2001
From: Svjatoslav Agejenko <svjatoslav@svjatoslav.eu>
Date: Wed, 3 Jul 2013 21:58:48 +0300
Subject: [PATCH] implementing XSD parser

---
 .../eu/svjatoslav/inspector/xml/xsd/Main.java | 10 ++-
 .../eu/svjatoslav/inspector/xml/xsd/XSD.java  | 84 +++++++++++++++++++
 .../inspector/xml/xsd/XmlElement.java         | 53 ++++++++++++
 3 files changed, 146 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/eu/svjatoslav/inspector/xml/xsd/XSD.java
 create mode 100644 src/main/java/eu/svjatoslav/inspector/xml/xsd/XmlElement.java

diff --git a/src/main/java/eu/svjatoslav/inspector/xml/xsd/Main.java b/src/main/java/eu/svjatoslav/inspector/xml/xsd/Main.java
index 9ecb76e..d0093f4 100644
--- a/src/main/java/eu/svjatoslav/inspector/xml/xsd/Main.java
+++ b/src/main/java/eu/svjatoslav/inspector/xml/xsd/Main.java
@@ -1,8 +1,16 @@
 package eu.svjatoslav.inspector.xml.xsd;
 
+import java.io.FileNotFoundException;
+
 public class Main {
 
-	public static void main(final String[] args) {
+	public static void main(final String[] args) throws FileNotFoundException {
+
+		final XSD xsd = new XSD();
+
+		xsd.parse("/home/n0/Desktop/MeterSchema.xsd");
+
+		System.out.println(xsd);
 
 	}
 
diff --git a/src/main/java/eu/svjatoslav/inspector/xml/xsd/XSD.java b/src/main/java/eu/svjatoslav/inspector/xml/xsd/XSD.java
new file mode 100644
index 0000000..3d5ff45
--- /dev/null
+++ b/src/main/java/eu/svjatoslav/inspector/xml/xsd/XSD.java
@@ -0,0 +1,84 @@
+package eu.svjatoslav.inspector.xml.xsd;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.w3c.dom.Document;
+import org.xml.sax.SAXException;
+
+public class XSD {
+
+	private static final String XMLNS_PREFIX = "xmlns:";
+	Map<String, String> namespaces = new HashMap<String, String>();
+
+	private void detectNamespaces(final XmlElement xsdSchema) {
+		for (final String attributeName : xsdSchema.getAttributeNames())
+
+			if (attributeName.startsWith(XMLNS_PREFIX)) {
+				final String nameSpaceName = attributeName
+						.substring(XMLNS_PREFIX.length());
+				namespaces.put(nameSpaceName,
+						xsdSchema.getAttributeValue(attributeName));
+			}
+	}
+
+	public void parse(final InputStream inputStream) {
+
+		final DocumentBuilderFactory builderFactory = DocumentBuilderFactory
+				.newInstance();
+
+		DocumentBuilder builder = null;
+		try {
+			builder = builderFactory.newDocumentBuilder();
+		} catch (final ParserConfigurationException e) {
+			e.printStackTrace();
+		}
+
+		Document document;
+		try {
+			document = builder.parse(inputStream);
+		} catch (final SAXException e) {
+			e.printStackTrace();
+			return;
+		} catch (final IOException e) {
+			e.printStackTrace();
+			return;
+		}
+
+		final XmlElement xsdSchema = new XmlElement(
+				document.getDocumentElement());
+
+		detectNamespaces(xsdSchema);
+
+		System.out.println(xsdSchema.toString());
+	}
+
+	public void parse(final String filePath) throws FileNotFoundException {
+
+		final FileInputStream inputStream = new FileInputStream(filePath);
+
+		parse(inputStream);
+	}
+
+	@Override
+	public String toString() {
+		final StringBuffer result = new StringBuffer();
+
+		result.append("namespaces:\n");
+
+		for (final Map.Entry<String, String> entry : namespaces.entrySet())
+			result.append("    " + entry.getKey() + " = " + entry.getValue()
+					+ "\n");
+
+		return result.toString();
+	}
+
+}
diff --git a/src/main/java/eu/svjatoslav/inspector/xml/xsd/XmlElement.java b/src/main/java/eu/svjatoslav/inspector/xml/xsd/XmlElement.java
new file mode 100644
index 0000000..6863fd4
--- /dev/null
+++ b/src/main/java/eu/svjatoslav/inspector/xml/xsd/XmlElement.java
@@ -0,0 +1,53 @@
+package eu.svjatoslav.inspector.xml.xsd;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+public class XmlElement {
+
+	Element element;
+
+	public XmlElement(final Element element) {
+		this.element = element;
+	}
+
+	public List<String> getAttributeNames() {
+		final ArrayList<String> result = new ArrayList<String>();
+
+		final NamedNodeMap attributes = element.getAttributes();
+
+		for (int i = 0; i < attributes.getLength(); i++) {
+			final Node node = attributes.item(i);
+
+			result.add(node.getNodeName());
+		}
+
+		return result;
+	}
+
+	public String getAttributeValue(final String attributeName) {
+		return element.getAttribute(attributeName);
+	}
+
+	@Override
+	public String toString() {
+		final StringBuffer result = new StringBuffer();
+
+		result.append("node name: " + element.getNodeName() + "\n");
+
+		final NamedNodeMap attributes = element.getAttributes();
+
+		for (int i = 0; i < attributes.getLength(); i++) {
+			final Node node = attributes.item(i);
+
+			result.append("    " + node.getNodeName() + "\n");
+		}
+
+		return result.toString();
+	}
+
+}
-- 
2.20.1