jaxp/src/java.xml/share/classes/javax/xml/parsers/SAXParserFactory.java
changeset 25868 686eef1e7a79
parent 25264 040625ce9b72
child 27574 2e8afdf5c6fb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/java.xml/share/classes/javax/xml/parsers/SAXParserFactory.java	Sun Aug 17 15:51:56 2014 +0100
@@ -0,0 +1,442 @@
+/*
+ * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.xml.parsers;
+
+import javax.xml.validation.Schema;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXNotRecognizedException;
+import org.xml.sax.SAXNotSupportedException;
+
+/**
+ * Defines a factory API that enables applications to configure and
+ * obtain a SAX based parser to parse XML documents.
+ *
+ * @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
+ * @author <a href="mailto:Neeraj.Bajaj@sun.com">Neeraj Bajaj</a>
+ *
+ * @since 1.4
+ */
+public abstract class SAXParserFactory {
+
+    /**
+     * <p>Should Parsers be validating?</p>
+     */
+    private boolean validating = false;
+
+    /**
+     * <p>Should Parsers be namespace aware?</p>
+     */
+    private boolean namespaceAware = false;
+
+    /**
+     * <p>Protected constructor to force use of {@link #newInstance()}.</p>
+     */
+    protected SAXParserFactory () {
+
+    }
+
+    /**
+     * Obtain a new instance of a <code>SAXParserFactory</code>. This
+     * static method creates a new factory instance
+     * This method uses the following ordered lookup procedure to determine
+     * the <code>SAXParserFactory</code> implementation class to
+     * load:
+     * <ul>
+     * <li>
+     * Use the <code>javax.xml.parsers.SAXParserFactory</code> system
+     * property.
+     * </li>
+     * <li>
+     * Use the properties file "lib/jaxp.properties" in the JRE directory.
+     * This configuration file is in standard <code>java.util.Properties
+     * </code> format and contains the fully qualified name of the
+     * implementation class with the key being the system property defined
+     * above.
+     *
+     * The jaxp.properties file is read only once by the JAXP implementation
+     * and it's values are then cached for future use.  If the file does not exist
+     * when the first attempt is made to read from it, no further attempts are
+     * made to check for its existence.  It is not possible to change the value
+     * of any property in jaxp.properties after it has been read for the first time.
+     * </li>
+     * <li>
+     * Use the service-provider loading facilities, defined by the
+     * {@link java.util.ServiceLoader} class, to attempt to locate and load an
+     * implementation of the service using the {@linkplain
+     * java.util.ServiceLoader#load(java.lang.Class) default loading mechanism}:
+     * the service-provider loading facility will use the {@linkplain
+     * java.lang.Thread#getContextClassLoader() current thread's context class loader}
+     * to attempt to load the service. If the context class
+     * loader is null, the {@linkplain
+     * ClassLoader#getSystemClassLoader() system class loader} will be used.
+     * </li>
+     * <li>
+     * Otherwise the system-default implementation is returned.
+     * </li>
+     * </ul>
+     *
+     * Once an application has obtained a reference to a
+     * <code>SAXParserFactory</code> it can use the factory to
+     * configure and obtain parser instances.
+     *
+     *
+     *
+     * <h2>Tip for Trouble-shooting</h2>
+     * <p>Setting the <code>jaxp.debug</code> system property will cause
+     * this method to print a lot of debug messages
+     * to <code>System.err</code> about what it is doing and where it is looking at.</p>
+     *
+     * <p> If you have problems loading {@link SAXParser}s, try:</p>
+     * <pre>
+     * java -Djaxp.debug=1 YourProgram ....
+     * </pre>
+     *
+     *
+     * @return A new instance of a SAXParserFactory.
+     *
+     * @throws FactoryConfigurationError in case of {@linkplain
+     * java.util.ServiceConfigurationError service configuration error} or if
+     * the implementation is not available or cannot be instantiated.
+     */
+
+    public static SAXParserFactory newInstance() {
+        return FactoryFinder.find(
+                /* The default property name according to the JAXP spec */
+                SAXParserFactory.class,
+                /* The fallback implementation class name */
+                "com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl");
+    }
+
+    /**
+     * <p>Obtain a new instance of a <code>SAXParserFactory</code> from class name.
+     * This function is useful when there are multiple providers in the classpath.
+     * It gives more control to the application as it can specify which provider
+     * should be loaded.</p>
+     *
+     * <p>Once an application has obtained a reference to a <code>SAXParserFactory</code>
+     * it can use the factory to configure and obtain parser instances.</p>
+     *
+     *
+     * <h2>Tip for Trouble-shooting</h2>
+     * <p>Setting the <code>jaxp.debug</code> system property will cause
+     * this method to print a lot of debug messages
+     * to <code>System.err</code> about what it is doing and where it is looking at.</p>
+     *
+     * <p> If you have problems, try:</p>
+     * <pre>
+     * java -Djaxp.debug=1 YourProgram ....
+     * </pre>
+     *
+     * @param factoryClassName fully qualified factory class name that provides implementation of <code>javax.xml.parsers.SAXParserFactory</code>.
+     *
+     * @param classLoader <code>ClassLoader</code> used to load the factory class. If <code>null</code>
+     *                     current <code>Thread</code>'s context classLoader is used to load the factory class.
+     *
+     * @return New instance of a <code>SAXParserFactory</code>
+     *
+     * @throws FactoryConfigurationError if <code>factoryClassName</code> is <code>null</code>, or
+     *                                   the factory class cannot be loaded, instantiated.
+     *
+     * @see #newInstance()
+     *
+     * @since 1.6
+     */
+    public static SAXParserFactory newInstance(String factoryClassName, ClassLoader classLoader){
+            //do not fallback if given classloader can't find the class, throw exception
+            return FactoryFinder.newInstance(SAXParserFactory.class,
+                    factoryClassName, classLoader, false);
+    }
+
+    /**
+     * <p>Creates a new instance of a SAXParser using the currently
+     * configured factory parameters.</p>
+     *
+     * @return A new instance of a SAXParser.
+     *
+     * @throws ParserConfigurationException if a parser cannot
+     *   be created which satisfies the requested configuration.
+     * @throws SAXException for SAX errors.
+     */
+
+    public abstract SAXParser newSAXParser()
+        throws ParserConfigurationException, SAXException;
+
+
+    /**
+     * Specifies that the parser produced by this code will
+     * provide support for XML namespaces. By default the value of this is set
+     * to <code>false</code>.
+     *
+     * @param awareness true if the parser produced by this code will
+     *                  provide support for XML namespaces; false otherwise.
+     */
+
+    public void setNamespaceAware(boolean awareness) {
+        this.namespaceAware = awareness;
+    }
+
+    /**
+     * Specifies that the parser produced by this code will
+     * validate documents as they are parsed. By default the value of this is
+     * set to <code>false</code>.
+     *
+     * <p>
+     * Note that "the validation" here means
+     * <a href="http://www.w3.org/TR/REC-xml#proc-types">a validating
+     * parser</a> as defined in the XML recommendation.
+     * In other words, it essentially just controls the DTD validation.
+     * (except the legacy two properties defined in JAXP 1.2.)
+     * </p>
+     *
+     * <p>
+     * To use modern schema languages such as W3C XML Schema or
+     * RELAX NG instead of DTD, you can configure your parser to be
+     * a non-validating parser by leaving the {@link #setValidating(boolean)}
+     * method <code>false</code>, then use the {@link #setSchema(Schema)}
+     * method to associate a schema to a parser.
+     * </p>
+     *
+     * @param validating true if the parser produced by this code will
+     *                   validate documents as they are parsed; false otherwise.
+     */
+
+    public void setValidating(boolean validating) {
+        this.validating = validating;
+    }
+
+    /**
+     * Indicates whether or not the factory is configured to produce
+     * parsers which are namespace aware.
+     *
+     * @return true if the factory is configured to produce
+     *         parsers which are namespace aware; false otherwise.
+     */
+
+    public boolean isNamespaceAware() {
+        return namespaceAware;
+    }
+
+    /**
+     * Indicates whether or not the factory is configured to produce
+     * parsers which validate the XML content during parse.
+     *
+     * @return true if the factory is configured to produce parsers which validate
+     *         the XML content during parse; false otherwise.
+     */
+
+    public boolean isValidating() {
+        return validating;
+    }
+
+    /**
+     *
+     * <p>Sets the particular feature in the underlying implementation of
+     * org.xml.sax.XMLReader.
+     * A list of the core features and properties can be found at
+     * <a href="http://www.saxproject.org/">http://www.saxproject.org/</a></p>
+     *
+     * <p>All implementations are required to support the {@link javax.xml.XMLConstants#FEATURE_SECURE_PROCESSING} feature.
+     * When the feature is</p>
+     * <ul>
+     *   <li>
+     *     <code>true</code>: the implementation will limit XML processing to conform to implementation limits.
+     *     Examples include entity expansion limits and XML Schema constructs that would consume large amounts of resources.
+     *     If XML processing is limited for security reasons, it will be reported via a call to the registered
+     *     {@link org.xml.sax.ErrorHandler#fatalError(SAXParseException exception)}.
+     *     See {@link SAXParser} <code>parse</code> methods for handler specification.
+     *   </li>
+     *   <li>
+     *     When the feature is <code>false</code>, the implementation will processing XML according to the XML specifications without
+     *     regard to possible implementation limits.
+     *   </li>
+     * </ul>
+     *
+     * @param name The name of the feature to be set.
+     * @param value The value of the feature to be set.
+     *
+     * @throws ParserConfigurationException if a parser cannot
+     *     be created which satisfies the requested configuration.
+     * @throws SAXNotRecognizedException When the underlying XMLReader does
+     *            not recognize the property name.
+     * @throws SAXNotSupportedException When the underlying XMLReader
+     *            recognizes the property name but doesn't support the
+     *            property.
+     * @throws NullPointerException If the <code>name</code> parameter is null.
+     *
+     * @see org.xml.sax.XMLReader#setFeature
+     */
+    public abstract void setFeature(String name, boolean value)
+        throws ParserConfigurationException, SAXNotRecognizedException,
+                SAXNotSupportedException;
+
+    /**
+     *
+     * <p>Returns the particular property requested for in the underlying
+     * implementation of org.xml.sax.XMLReader.</p>
+     *
+     * @param name The name of the property to be retrieved.
+     *
+     * @return Value of the requested property.
+     *
+     * @throws ParserConfigurationException if a parser cannot be created which satisfies the requested configuration.
+     * @throws SAXNotRecognizedException When the underlying XMLReader does not recognize the property name.
+     * @throws SAXNotSupportedException When the underlying XMLReader recognizes the property name but doesn't support the property.
+     *
+     * @see org.xml.sax.XMLReader#getProperty
+     */
+    public abstract boolean getFeature(String name)
+        throws ParserConfigurationException, SAXNotRecognizedException,
+                SAXNotSupportedException;
+
+
+    /**
+     * Gets the {@link Schema} object specified through
+     * the {@link #setSchema(Schema schema)} method.
+     *
+     *
+     * @throws UnsupportedOperationException When implementation does not
+     *   override this method
+     *
+     * @return
+     *      the {@link Schema} object that was last set through
+     *      the {@link #setSchema(Schema)} method, or null
+     *      if the method was not invoked since a {@link SAXParserFactory}
+     *      is created.
+     *
+     * @since 1.5
+     */
+    public Schema getSchema() {
+        throw new UnsupportedOperationException(
+            "This parser does not support specification \""
+            + this.getClass().getPackage().getSpecificationTitle()
+            + "\" version \""
+            + this.getClass().getPackage().getSpecificationVersion()
+            + "\""
+            );
+    }
+
+    /**
+     * <p>Set the {@link Schema} to be used by parsers created
+     * from this factory.</p>
+     *
+     * <p>When a {@link Schema} is non-null, a parser will use a validator
+     * created from it to validate documents before it passes information
+     * down to the application.</p>
+     *
+     * <p>When warnings/errors/fatal errors are found by the validator, the parser must
+     * handle them as if those errors were found by the parser itself.
+     * In other words, if the user-specified {@link org.xml.sax.ErrorHandler}
+     * is set, it must receive those errors, and if not, they must be
+     * treated according to the implementation specific
+     * default error handling rules.
+     *
+     * <p>A validator may modify the SAX event stream (for example by
+     * adding default values that were missing in documents), and a parser
+     * is responsible to make sure that the application will receive
+     * those modified event stream.</p>
+     *
+     * <p>Initially, <code>null</code> is set as the {@link Schema}.</p>
+     *
+     * <p>This processing will take effect even if
+     * the {@link #isValidating()} method returns <code>false</code>.
+     *
+     * <p>It is an error to use
+     * the <code>http://java.sun.com/xml/jaxp/properties/schemaSource</code>
+     * property and/or the <code>http://java.sun.com/xml/jaxp/properties/schemaLanguage</code>
+     * property in conjunction with a non-null {@link Schema} object.
+     * Such configuration will cause a {@link SAXException}
+     * exception when those properties are set on a {@link SAXParser}.</p>
+     *
+     * <h4>Note for implementors</h4>
+     * <p>
+     * A parser must be able to work with any {@link Schema}
+     * implementation. However, parsers and schemas are allowed
+     * to use implementation-specific custom mechanisms
+     * as long as they yield the result described in the specification.
+     * </p>
+     *
+     * @param schema <code>Schema</code> to use, <code>null</code> to remove a schema.
+     *
+     * @throws UnsupportedOperationException When implementation does not
+     *   override this method
+     *
+     * @since 1.5
+     */
+    public void setSchema(Schema schema) {
+        throw new UnsupportedOperationException(
+            "This parser does not support specification \""
+            + this.getClass().getPackage().getSpecificationTitle()
+            + "\" version \""
+            + this.getClass().getPackage().getSpecificationVersion()
+            + "\""
+            );
+    }
+
+    /**
+     * <p>Set state of XInclude processing.</p>
+     *
+     * <p>If XInclude markup is found in the document instance, should it be
+     * processed as specified in <a href="http://www.w3.org/TR/xinclude/">
+     * XML Inclusions (XInclude) Version 1.0</a>.</p>
+     *
+     * <p>XInclude processing defaults to <code>false</code>.</p>
+     *
+     * @param state Set XInclude processing to <code>true</code> or
+     *   <code>false</code>
+     *
+     * @throws UnsupportedOperationException When implementation does not
+     *   override this method
+     *
+     * @since 1.5
+     */
+    public void setXIncludeAware(final boolean state) {
+        if (state) {
+            throw new UnsupportedOperationException(" setXIncludeAware " +
+                "is not supported on this JAXP"  +
+                " implementation or earlier: " + this.getClass());
+        }
+    }
+
+    /**
+     * <p>Get state of XInclude processing.</p>
+     *
+     * @return current state of XInclude processing
+     *
+     * @throws UnsupportedOperationException When implementation does not
+     *   override this method
+     *
+     * @since 1.5
+     */
+    public boolean isXIncludeAware() {
+        throw new UnsupportedOperationException(
+            "This parser does not support specification \""
+            + this.getClass().getPackage().getSpecificationTitle()
+            + "\" version \""
+            + this.getClass().getPackage().getSpecificationVersion()
+            + "\""
+            );
+    }
+}