added XMLDocument, XMLSchema, and XSLTransformation classes.

[utils] / support / general / src / main / java / org / wamblee / xml / XMLSchema.java

diff --git a/support/general/src/main/java/org/wamblee/xml/XMLSchema.java b/support/general/src/main/java/org/wamblee/xml/XMLSchema.java
new file mode 100644 (file)
index 0000000..956de70
--- /dev/null
+++ b/support/general/src/main/java/org/wamblee/xml/XMLSchema.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2005-2011 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.wamblee.xml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URI;
+
+import javax.xml.XMLConstants;
+import javax.xml.transform.Source;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamSource;
+import javax.xml.validation.Schema;
+import javax.xml.validation.SchemaFactory;
+import javax.xml.validation.Validator;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.ls.LSResourceResolver;
+import org.xml.sax.SAXException;
+
+/**
+ * Represents an XML Schema. 
+ * 
+ * @author Erik Brakkee
+ */
+public class XMLSchema implements XMLProcessor {
+
+    private Schema schema;
+    private Validator validator;
+
+    public XMLSchema(URI aUri) throws XMLException {
+        try {
+            initialize(aUri.toString(), aUri.toURL().openStream(), null);
+        } catch (MalformedURLException e) {
+            throw new XMLException("Could not read '" + aUri + "'", e);
+        } catch (IOException e) {
+            throw new XMLException("Could not read '" + aUri + "'", e);
+        }
+    }
+
+    public XMLSchema(String aSystemId, InputStream aIs, LSResourceResolver aResolver) throws XMLException {
+        initialize(aSystemId, aIs, aResolver);
+    }
+
+    private void initialize(String aSystemId, InputStream aIs, LSResourceResolver aResolver)
+        throws XMLException {
+        try {
+            SchemaFactory factory = SchemaFactory
+                .newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+            if (aResolver != null) {
+                factory.setResourceResolver(aResolver);
+            }
+            Source source = new StreamSource(aIs);
+            source.setSystemId(aSystemId);
+            schema = factory.newSchema(source);
+            validator = schema.newValidator();
+        } catch (SAXException e) {
+            throw new XMLException(e.getMessage(), e);
+        }
+    }
+
+    public static XMLSchema schema(URI aUri) throws XMLException {
+        return new XMLSchema(aUri);
+    }
+
+    public static XMLSchema schema(String aSystemId, InputStream aIs, LSResourceResolver aResolver) throws XMLException {
+        return new XMLSchema(aSystemId, aIs, aResolver);
+    }
+    
+    private void validateImpl(DOMSource aDoc) throws XMLException { 
+        try {
+            validator.validate(aDoc);
+        } catch (SAXException e) {
+            throw new XMLException(e.getMessage(), e);
+        } catch (IOException e) {
+            throw new XMLException(e.getMessage(), e);
+        }
+    }
+
+    public void validate(XMLDocument aDocument) throws XMLException {
+        validateImpl(aDocument.getDOMSource());
+    }
+
+    public void validate(DOMSource aDocument) throws XMLException {
+        validateImpl(aDocument);
+    }
+
+    @Override
+    public DOMSource process(DOMSource aDocument) throws XMLException {
+        validate(aDocument); 
+        return aDocument;
+    }
+
+}