8249867: XML declaration is not followed by a newline

Reviewed-by: bae
Backport-of: 69ee314b63a9f260e3dcbe9ccd67ddc4faec3ba0

src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/ToStream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2021, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
@@ -20,6 +20,7 @@
 
 package com.sun.org.apache.xml.internal.serializer;
 
+import com.sun.org.apache.xml.internal.serializer.dom3.DOMConstants;
 import com.sun.org.apache.xml.internal.serializer.utils.MsgKey;
 import com.sun.org.apache.xml.internal.serializer.utils.Utils;
 import com.sun.org.apache.xml.internal.serializer.utils.WrappedRuntimeException;
@@ -493,8 +494,10 @@ void setProp(String name, String val, boolean defaultVal) {
                 if (OutputPropertiesFactory.S_KEY_INDENT_AMOUNT.equals(name)) {
                     setIndentAmount(Integer.parseInt(val));
                 } else if (OutputKeys.INDENT.equals(name)) {
-                    boolean b = val.endsWith("yes") ? true : false;
-                    m_doIndent = b;
+                    m_doIndent = val.endsWith("yes");
+                } else if ((DOMConstants.S_JDK_PROPERTIES_NS + DOMConstants.S_IS_STANDALONE)
+                        .equals(name)) {
+                    m_isStandalone = val.endsWith("yes");
                 }
 
                 break;

src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/dom3/DOMConstants.java

@@ -1,6 +1,5 @@
 /*
- * reserved comment block
- * DO NOT REMOVE OR ALTER!
+ * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one
@@ -22,26 +21,34 @@
 
 package com.sun.org.apache.xml.internal.serializer.dom3;
 
+import com.sun.org.apache.xerces.internal.impl.Constants;
+
 /**
  * DOM Constants used by the DOM Level 3 LSSerializer implementation.
  *
  * @xsl.usage internal
+ * @LastModified: Jan 2021
  */
-final class DOMConstants {
+public final class DOMConstants {
     //
     // Constants: DOM Level 3 feature ids
     //
     public static final String DOM3_REC_URL = "http://www.w3.org/TR/DOM-Level-3-LS";
 
     public static final String XERCES_URL = "http://xml.apache.org/xerces-2j";
 
+    public static final String ORACLE_URL = "http://www.oracle.com/xml";
+
     // The namespace used to qualified DOM Level 3 DOMConfiguration parameters
     public static final String S_DOM3_PROPERTIES_NS = "{"
             + DOMConstants.DOM3_REC_URL + "}";
 
     public static final String S_XERCES_PROPERTIES_NS = "{"
             + DOMConstants.XERCES_URL + "}";
 
+    // The namespace used for the JDK-only parameters
+    public static final String S_JDK_PROPERTIES_NS = "{" + ORACLE_URL + "}";
+
     // xmlns namespaces
     private static final String XMLNS_URI = "http://www.w3.org/2000/xmlns/";
 
@@ -113,6 +120,25 @@ final class DOMConstants {
     // The xerces serializer specific 'omit-xml-declaration' property used in LSSerializer
     public static final String S_XML_VERSION = "xml-version";
 
+    /**
+     * Indicates that the serializer should treat the output as a standalone document.
+     * The JDK specific standalone property controls whether a newline should be
+     * added after the XML header.
+     *
+     * @see similar property ORACLE_IS_STANDALONE in OutputPropertiesFactory.
+     */
+    public static final String S_IS_STANDALONE = "isStandalone";
+
+    // Fully-qualified property name with the JDK Impl prefix
+    public static final String FQ_IS_STANDALONE =
+            Constants.ORACLE_JAXP_PROPERTY_PREFIX + S_IS_STANDALONE;
+
+    // The property with namespace as the internal DOMConfiguration format
+    public static final String NS_IS_STANDALONE = S_JDK_PROPERTIES_NS + S_IS_STANDALONE;
+
+    // Corresponding System property
+    public static final String SP_IS_STANDALONE = "jdk.xml.isStandalone";
+
     //
     public static final String S_XSL_VALUE_ENTITIES = "com/sun/org/apache/xml/internal/serializer/XMLEntities";
 

src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/dom3/LSSerializerImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
  */
 /*
  * Licensed to the Apache Software Foundation (ASF) under one
@@ -21,6 +21,7 @@
 
 package com.sun.org.apache.xml.internal.serializer.dom3;
 
+import com.sun.org.apache.xerces.internal.impl.Constants;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.OutputStream;
@@ -32,7 +33,7 @@
 import java.net.URL;
 import java.net.URLConnection;
 import java.util.Properties;
-
+import jdk.xml.internal.SecuritySupport;
 import com.sun.org.apache.xml.internal.serializer.DOM3Serializer;
 import com.sun.org.apache.xml.internal.serializer.Encodings;
 import com.sun.org.apache.xml.internal.serializer.Serializer;
@@ -67,7 +68,7 @@
  * @version $Id:
  *
  * @xsl.usage internal
- * @LastModified: Aug 2019
+ * @LastModified: Jan 2021
  */
 final public class LSSerializerImpl implements DOMConfiguration, LSSerializer {
 
@@ -159,6 +160,10 @@ final public class LSSerializerImpl implements DOMConfiguration, LSSerializer {
 
     // Parameter discard-default-content, true [required] (default)
     private final static int XMLDECL = 0x1 << 18;
+
+    // Parameter is-standalone, jdk specific, not required
+    private final static int IS_STANDALONE = 0x1 << 19;
+
     // ************************************************************************
 
     // Recognized parameters for which atleast one value can be set
@@ -182,6 +187,7 @@ final public class LSSerializerImpl implements DOMConfiguration, LSSerializer {
             DOMConstants.DOM_FORMAT_PRETTY_PRINT,
             DOMConstants.DOM_IGNORE_UNKNOWN_CHARACTER_DENORMALIZATIONS,
             DOMConstants.DOM_XMLDECL,
+            DOMConstants.FQ_IS_STANDALONE,
             DOMConstants.DOM_ERROR_HANDLER
     };
 
@@ -351,6 +357,20 @@ public void initializeSerializerProps () {
         // xml-declaration
         fDOMConfigProperties.setProperty(DOMConstants.S_XSL_OUTPUT_OMIT_XML_DECL, "no");
 
+        // JDK specific property isStandalone
+        String p = SecuritySupport.getSystemProperty(DOMConstants.SP_IS_STANDALONE);
+        if (p == null || p.isEmpty()) {
+            p = SecuritySupport.readJAXPProperty(DOMConstants.SP_IS_STANDALONE);
+        }
+        // the system property is true only if it is "true" and false otherwise
+        if (p != null && p.equals("true")) {
+            fFeatures |= IS_STANDALONE;
+            fDOMConfigProperties.setProperty(DOMConstants.NS_IS_STANDALONE,
+                    DOMConstants.DOM3_EXPLICIT_TRUE);
+        } else {
+            fDOMConfigProperties.setProperty(DOMConstants.NS_IS_STANDALONE,
+                    DOMConstants.DOM3_DEFAULT_FALSE);
+        }
     }
 
     // ************************************************************************
@@ -378,7 +398,8 @@ public boolean canSetParameter(String name, Object value) {
                     || name.equalsIgnoreCase(DOMConstants.DOM_WELLFORMED)
                     || name.equalsIgnoreCase(DOMConstants.DOM_DISCARD_DEFAULT_CONTENT)
                     || name.equalsIgnoreCase(DOMConstants.DOM_FORMAT_PRETTY_PRINT)
-                    || name.equalsIgnoreCase(DOMConstants.DOM_XMLDECL)){
+                    || name.equalsIgnoreCase(DOMConstants.DOM_XMLDECL)
+                    || name.equalsIgnoreCase(DOMConstants.FQ_IS_STANDALONE)){
                 // both values supported
                 return true;
             }
@@ -390,11 +411,11 @@ else if (name.equalsIgnoreCase(DOMConstants.DOM_CANONICAL_FORM)
                     // || name.equalsIgnoreCase(DOMConstants.DOM_NORMALIZE_CHARACTERS)
                     ) {
                 // true is not supported
-                return !((Boolean)value).booleanValue();
+                return !((Boolean)value);
             }
             else if (name.equalsIgnoreCase(DOMConstants.DOM_IGNORE_UNKNOWN_CHARACTER_DENORMALIZATIONS)) {
                 // false is not supported
-                return ((Boolean)value).booleanValue();
+                return ((Boolean)value);
             }
         }
         else if (name.equalsIgnoreCase(DOMConstants.DOM_ERROR_HANDLER) &&
@@ -436,6 +457,8 @@ public Object getParameter(String name) throws DOMException {
             return ((fFeatures & PRETTY_PRINT) != 0) ? Boolean.TRUE : Boolean.FALSE;
         } else if (name.equalsIgnoreCase(DOMConstants.DOM_XMLDECL)) {
             return ((fFeatures & XMLDECL) != 0) ? Boolean.TRUE : Boolean.FALSE;
+        } else if (name.equalsIgnoreCase(DOMConstants.FQ_IS_STANDALONE)) {
+            return ((fFeatures & IS_STANDALONE) != 0) ? Boolean.TRUE : Boolean.FALSE;
         } else if (name.equalsIgnoreCase(DOMConstants.DOM_ELEMENT_CONTENT_WHITESPACE)) {
             return ((fFeatures & ELEM_CONTENT_WHITESPACE) != 0) ? Boolean.TRUE : Boolean.FALSE;
         } else if (name.equalsIgnoreCase(DOMConstants.DOM_IGNORE_UNKNOWN_CHARACTER_DENORMALIZATIONS)) {
@@ -606,6 +629,10 @@ public void setParameter(String name, Object value) throws DOMException {
                 } else {
                     fDOMConfigProperties.setProperty(DOMConstants.S_XSL_OUTPUT_OMIT_XML_DECL, "yes");
                 }
+            } else if (name.equalsIgnoreCase(DOMConstants.FQ_IS_STANDALONE)) {
+                fFeatures = state ? fFeatures | IS_STANDALONE : fFeatures & ~IS_STANDALONE;
+                fDOMConfigProperties.setProperty(DOMConstants.NS_IS_STANDALONE, state ? "yes" : "no");
+
             } else if (name.equalsIgnoreCase(DOMConstants.DOM_ELEMENT_CONTENT_WHITESPACE)) {
                 fFeatures = state ? fFeatures | ELEM_CONTENT_WHITESPACE : fFeatures
                         & ~ELEM_CONTENT_WHITESPACE;