1 files changed, 340 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/xml/internal/resolver/tools/CatalogResolver.java b/src/share/classes/com/sun/org/apache/xml/internal/resolver/tools/CatalogResolver.java
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index 0000000..778e5a2
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@@ -0,0 +1,340 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+// CatalogResolver.java - A SAX EntityResolver/JAXP URI Resolver
+
+/*
+ * Copyright 2001-2004 The Apache Software Foundation or its licensors,
+ * as applicable.
+ *
+ * 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 com.sun.org.apache.xml.internal.resolver.tools;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.MalformedURLException;
+
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+import org.xml.sax.InputSource;
+import org.xml.sax.EntityResolver;
+
+import javax.xml.transform.sax.SAXSource;
+import javax.xml.transform.Source;
+import javax.xml.transform.URIResolver;
+import javax.xml.transform.TransformerException;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParserFactory;
+
+import com.sun.org.apache.xml.internal.resolver.Catalog;
+import com.sun.org.apache.xml.internal.resolver.CatalogManager;
+import com.sun.org.apache.xml.internal.resolver.helpers.FileURL;
+
+/**
+ * A SAX EntityResolver/JAXP URIResolver that uses catalogs.
+ *
+ * <p>This class implements both a SAX EntityResolver and a JAXP URIResolver.
+ * </p>
+ *
+ * <p>This resolver understands OASIS TR9401 catalogs, XCatalogs, and the
+ * current working draft of the OASIS Entity Resolution Technical
+ * Committee specification.</p>
+ *
+ * @see Catalog
+ * @see org.xml.sax.EntityResolver
+ * @see javax.xml.transform.URIResolver
+ *
+ * @author Norman Walsh
+ * <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a>
+ *
+ */
+public class CatalogResolver implements EntityResolver, URIResolver {
+  /** Make the parser Namespace aware? */
+  public boolean namespaceAware = true;
+
+  /** Make the parser validating? */
+  public boolean validating = false;
+
+  /** The underlying catalog */
+  private Catalog catalog = null;
+
+  /** The catalog manager */
+  private CatalogManager catalogManager = CatalogManager.getStaticManager();
+
+  /** Constructor */
+  public CatalogResolver() {
+    initializeCatalogs(false);
+  }
+
+  /** Constructor */
+  public CatalogResolver(boolean privateCatalog) {
+    initializeCatalogs(privateCatalog);
+  }
+
+  /** Constructor */
+  public CatalogResolver(CatalogManager manager) {
+    catalogManager = manager;
+    initializeCatalogs(!catalogManager.getUseStaticCatalog());
+  }
+
+  /** Initialize catalog */
+  private void initializeCatalogs(boolean privateCatalog) {
+    catalog = catalogManager.getCatalog();
+  }
+
+  /** Return the underlying catalog */
+  public Catalog getCatalog() {
+    return catalog;
+  }
+
+  /**
+   * Implements the guts of the <code>resolveEntity</code> method
+   * for the SAX interface.
+   *
+   * <p>Presented with an optional public identifier and a system
+   * identifier, this function attempts to locate a mapping in the
+   * catalogs.</p>
+   *
+   * <p>If such a mapping is found, it is returned.  If no mapping is
+   * found, null is returned.</p>
+   *
+   * @param publicId  The public identifier for the entity in question.
+   * This may be null.
+   *
+   * @param systemId  The system identifier for the entity in question.
+   * XML requires a system identifier on all external entities, so this
+   * value is always specified.
+   *
+   * @return The resolved identifier (a URI reference).
+   */
+  public String getResolvedEntity (String publicId, String systemId) {
+    String resolved = null;
+
+    if (catalog == null) {
+      catalogManager.debug.message(1, "Catalog resolution attempted with null catalog; ignored");
+      return null;
+    }
+
+    if (systemId != null) {
+      try {
+        resolved = catalog.resolveSystem(systemId);
+      } catch (MalformedURLException me) {
+        catalogManager.debug.message(1, "Malformed URL exception trying to resolve",
+                      publicId);
+        resolved = null;
+      } catch (IOException ie) {
+        catalogManager.debug.message(1, "I/O exception trying to resolve", publicId);
+        resolved = null;
+      }
+    }
+
+    if (resolved == null) {
+      if (publicId != null) {
+        try {
+          resolved = catalog.resolvePublic(publicId, systemId);
+        } catch (MalformedURLException me) {
+          catalogManager.debug.message(1, "Malformed URL exception trying to resolve",
+                        publicId);
+        } catch (IOException ie) {
+          catalogManager.debug.message(1, "I/O exception trying to resolve", publicId);
+        }
+      }
+
+      if (resolved != null) {
+        catalogManager.debug.message(2, "Resolved public", publicId, resolved);
+      }
+    } else {
+      catalogManager.debug.message(2, "Resolved system", systemId, resolved);
+    }
+
+    return resolved;
+  }
+
+  /**
+   * Implements the <code>resolveEntity</code> method
+   * for the SAX interface.
+   *
+   * <p>Presented with an optional public identifier and a system
+   * identifier, this function attempts to locate a mapping in the
+   * catalogs.</p>
+   *
+   * <p>If such a mapping is found, the resolver attempts to open
+   * the mapped value as an InputSource and return it. Exceptions are
+   * ignored and null is returned if the mapped value cannot be opened
+   * as an input source.</p>
+   *
+   * <p>If no mapping is found (or an error occurs attempting to open
+   * the mapped value as an input source), null is returned and the system
+   * will use the specified system identifier as if no entityResolver
+   * was specified.</p>
+   *
+   * @param publicId  The public identifier for the entity in question.
+   * This may be null.
+   *
+   * @param systemId  The system identifier for the entity in question.
+   * XML requires a system identifier on all external entities, so this
+   * value is always specified.
+   *
+   * @return An InputSource for the mapped identifier, or null.
+   */
+  public InputSource resolveEntity (String publicId, String systemId) {
+    String resolved = getResolvedEntity(publicId, systemId);
+
+    if (resolved != null) {
+      try {
+        InputSource iSource = new InputSource(resolved);
+        iSource.setPublicId(publicId);
+
+        // Ideally this method would not attempt to open the
+        // InputStream, but there is a bug (in Xerces, at least)
+        // that causes the parser to mistakenly open the wrong
+        // system identifier if the returned InputSource does
+        // not have a byteStream.
+        //
+        // It could be argued that we still shouldn't do this here,
+        // but since the purpose of calling the entityResolver is
+        // almost certainly to open the input stream, it seems to
+        // do little harm.
+        //
+        URL url = new URL(resolved);
+        InputStream iStream = url.openStream();
+        iSource.setByteStream(iStream);
+
+        return iSource;
+      } catch (Exception e) {
+        catalogManager.debug.message(1, "Failed to create InputSource", resolved);
+        return null;
+      }
+    }
+
+    return null;
+  }
+
+  /** JAXP URIResolver API */
+  public Source resolve(String href, String base)
+    throws TransformerException {
+
+    String uri = href;
+    String fragment = null;
+    int hashPos = href.indexOf("#");
+    if (hashPos >= 0) {
+      uri = href.substring(0, hashPos);
+      fragment = href.substring(hashPos+1);
+    }
+
+    String result = null;
+
+    try {
+      result = catalog.resolveURI(href);
+    } catch (Exception e) {
+      // nop;
+    }
+
+    if (result == null) {
+      try {
+        URL url = null;
+
+        if (base==null) {
+          url = new URL(uri);
+          result = url.toString();
+        } else {
+          URL baseURL = new URL(base);
+          url = (href.length()==0 ? baseURL : new URL(baseURL, uri));
+          result = url.toString();
+        }
+      } catch (java.net.MalformedURLException mue) {
+        // try to make an absolute URI from the current base
+        String absBase = makeAbsolute(base);
+        if (!absBase.equals(base)) {
+          // don't bother if the absBase isn't different!
+          return resolve(href, absBase);
+        } else {
+          throw new TransformerException("Malformed URL "
+                                         + href + "(base " + base + ")",
+                                         mue);
+        }
+      }
+    }
+
+    catalogManager.debug.message(2, "Resolved URI", href, result);
+
+    SAXSource source = new SAXSource();
+    source.setInputSource(new InputSource(result));
+    setEntityResolver(source);
+    return source;
+  }
+
+  /**
+   * <p>Establish an entityResolver for newly resolved URIs.</p>
+   *
+   * <p>This is called from the URIResolver to set an EntityResolver
+   * on the SAX parser to be used for new XML documents that are
+   * encountered as a result of the document() function, xsl:import,
+   * or xsl:include.  This is done because the XSLT processor calls
+   * out to the SAXParserFactory itself to create a new SAXParser to
+   * parse the new document.  The new parser does not automatically
+   * inherit the EntityResolver of the original (although arguably
+   * it should).  See below:</p>
+   *
+   * <tt>"If an application wants to set the ErrorHandler or
+   * EntityResolver for an XMLReader used during a transformation,
+   * it should use a URIResolver to return the SAXSource which
+   * provides (with getXMLReader) a reference to the XMLReader"</tt>
+   *
+   * <p>...quoted from page 118 of the Java API for XML
+   * Processing 1.1 specification</p>
+   *
+   */
+  private void setEntityResolver(SAXSource source) throws TransformerException {
+    XMLReader reader = source.getXMLReader();
+    if (reader == null) {
+      SAXParserFactory spFactory = SAXParserFactory.newInstance();
+      spFactory.setNamespaceAware(true);
+      try {
+        reader = spFactory.newSAXParser().getXMLReader();
+      }
+      catch (ParserConfigurationException ex) {
+        throw new TransformerException(ex);
+      }
+      catch (SAXException ex) {
+        throw new TransformerException(ex);
+      }
+    }
+    reader.setEntityResolver(this);
+    source.setXMLReader(reader);
+  }
+
+  /** Attempt to construct an absolute URI */
+  private String makeAbsolute(String uri) {
+    if (uri == null) {
+      uri = "";
+    }
+
+    try {
+      URL url = new URL(uri);
+      return url.toString();
+    } catch (MalformedURLException mue) {
+      try {
+        URL fileURL = FileURL.makeURL(uri);
+        return fileURL.toString();
+      } catch (MalformedURLException mue2) {
+        // bail
+        return uri;
+      }
+    }
+  }
+}