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+/* GnomeDocumentBuilder.java -
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.libxmlj.dom;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.net.URL;
+import javax.xml.parsers.DocumentBuilder;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.DocumentType;
+import org.w3c.dom.DOMImplementation;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.ErrorHandler;
+import org.xml.sax.InputSource;
+import org.xml.sax.Locator;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+
+import gnu.xml.libxmlj.util.NamedInputStream;
+import gnu.xml.libxmlj.util.StandaloneDocumentType;
+import gnu.xml.libxmlj.util.StandaloneLocator;
+import gnu.xml.libxmlj.util.XMLJ;
+
+/**
+ * A JAXP DOM implementation that uses Gnome libxml2 as the underlying
+ * parser and node representation.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class GnomeDocumentBuilder
+ extends DocumentBuilder
+ implements DOMImplementation
+{
+
+ static
+ {
+ XMLJ.init();
+ }
+
+ // -- DocumentBuilder --
+
+ private boolean validate;
+ private boolean coalesce;
+ private boolean expandEntities;
+ private EntityResolver entityResolver;
+ private ErrorHandler errorHandler;
+ private boolean seenFatalError;
+
+ /**
+ * Constructs a new validating document builder.
+ */
+ public GnomeDocumentBuilder()
+ {
+ this(true, false, false);
+ }
+
+ /**
+ * Constructs a new document builder.
+ * @param validate whether to validate during parsing
+ * @param coalesce whether to merge CDATA as text nodes
+ * @param expandEntities whether to expand entity references
+ */
+ public GnomeDocumentBuilder(boolean validate,
+ boolean coalesce,
+ boolean expandEntities)
+ {
+ this.validate = validate;
+ this.coalesce = coalesce;
+ this.expandEntities = expandEntities;
+ }
+
+ public DOMImplementation getDOMImplementation()
+ {
+ return this;
+ }
+
+ public boolean isNamespaceAware()
+ {
+ return true;
+ }
+
+ public boolean isValidating()
+ {
+ return validate;
+ }
+
+ public Document newDocument()
+ {
+ return createDocument(null, null, null);
+ }
+
+ public Document parse(InputSource input)
+ throws SAXException, IOException
+ {
+ NamedInputStream in = XMLJ.getInputStream(input);
+ byte[] detectBuffer = in.getDetectBuffer();
+ String publicId = input.getPublicId();
+ String systemId = input.getSystemId();
+ String base = XMLJ.getBaseURI(systemId);
+ // Handle zero-length document
+ if (detectBuffer == null)
+ {
+ throw new SAXParseException("No document element", publicId,
+ systemId, 0, 0);
+ }
+ seenFatalError = false;
+ return parseStream(in,
+ detectBuffer,
+ publicId,
+ systemId,
+ base,
+ validate,
+ coalesce,
+ expandEntities,
+ true, //entityResolver != null,
+ errorHandler != null);
+ }
+
+ private native Document parseStream(InputStream in,
+ byte[] detectBuffer,
+ String publicId,
+ String systemId,
+ String base,
+ boolean validate,
+ boolean coalesce,
+ boolean expandEntities,
+ boolean entityResolver,
+ boolean errorHandler);
+
+ public void setEntityResolver(EntityResolver resolver)
+ {
+ entityResolver = resolver;
+ }
+
+ public void setErrorHandler(ErrorHandler handler)
+ {
+ errorHandler = handler;
+ }
+
+ // -- DOMImplementation --
+
+ public boolean hasFeature(String name, String version)
+ {
+ if (name.length() == 0)
+ {
+ return false;
+ }
+ name = name.toLowerCase();
+ if (name.charAt(0) == '+')
+ {
+ name = name.substring(1);
+ }
+
+ if ("xml".equals(name) || "core".equals(name))
+ {
+ return (version == null ||
+ "".equals(version) ||
+ "1.0".equals(version) ||
+ "2.0".equals(version) ||
+ "3.0".equals(version));
+
+ }
+ else if ("ls".equals(name) || "ls-async".equals(name))
+ {
+ // TODO
+ /*
+ return (version == null ||
+ "".equals(version) ||
+ "3.0".equals(version));
+ */
+ return false;
+ }
+ else if ("traversal".equals(name))
+ {
+ return (version == null ||
+ "".equals(version) ||
+ "2.0".equals(version));
+ }
+ else if ("xpath".equals(name))
+ {
+ return (version == null ||
+ "".equals(version) ||
+ "3.0".equals(version));
+ }
+ return false;
+ }
+
+ // DOM Level 3
+
+ public Object getFeature(String feature, String version)
+ {
+ if (hasFeature(feature, version))
+ {
+ return this;
+ }
+ return null;
+ }
+
+ public native Document createDocument(String namespaceURI,
+ String qualifiedName,
+ DocumentType doctype);
+
+ public DocumentType createDocumentType(String qualifiedName,
+ String publicId,
+ String systemId)
+ {
+ return new StandaloneDocumentType(qualifiedName, publicId, systemId);
+ }
+
+ // Callback hooks from JNI
+
+ private void setDocumentLocator(Object ctx, Object loc)
+ {
+ // ignore
+ }
+
+ private InputStream resolveEntity(String publicId, String systemId,
+ String base)
+ throws SAXException, IOException
+ {
+ String url = XMLJ.getAbsoluteURI(base, systemId);
+ InputStream in = null;
+ if (entityResolver != null)
+ {
+ InputSource source = entityResolver.resolveEntity(publicId, url);
+ if (source != null)
+ {
+ in = XMLJ.getInputStream(source);
+ }
+ }
+ if (in == null)
+ {
+ in = XMLJ.getInputStream(new URL(url));
+ }
+ return in;
+ }
+
+ private void warning(String message,
+ int lineNumber,
+ int columnNumber,
+ String publicId,
+ String systemId)
+ throws SAXException
+ {
+ if (!seenFatalError && errorHandler != null)
+ {
+ Locator l = new StandaloneLocator(lineNumber,
+ columnNumber,
+ publicId,
+ systemId);
+ errorHandler.warning(new SAXParseException(message, l));
+ }
+ }
+
+ private void error(String message,
+ int lineNumber,
+ int columnNumber,
+ String publicId,
+ String systemId)
+ throws SAXException
+ {
+ if (!seenFatalError && errorHandler != null)
+ {
+ Locator l = new StandaloneLocator(lineNumber,
+ columnNumber,
+ publicId,
+ systemId);
+ errorHandler.error(new SAXParseException(message, l));
+ }
+ }
+
+ private void fatalError(String message,
+ int lineNumber,
+ int columnNumber,
+ String publicId,
+ String systemId)
+ throws SAXException
+ {
+ if (!seenFatalError && errorHandler != null)
+ {
+ seenFatalError = true;
+ Locator l = new StandaloneLocator(lineNumber,
+ columnNumber,
+ publicId,
+ systemId);
+ errorHandler.fatalError(new SAXParseException(message, l));
+ }
+ }
+
+}
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