tests: enable discouragedReference=warning, declare x-friends

to get rid of warnings during build (does not respect the jdt
preferences)

org.eclipse.jdt.core.compiler.batch/META-INF/MANIFEST.MF

@@ -12,21 +12,21 @@ Bundle-RequiredExecutionEnvironment: JavaSE-17
 Export-Package: META-INF.services,
  org.eclipse.jdt.core.compiler,
  org.eclipse.jdt.core.compiler.batch,
- org.eclipse.jdt.internal.antadapter;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.apt.dispatch;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.apt.model;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.apt.util;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.ast;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.batch;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.classfmt;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.codegen;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.env;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.flow;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.impl;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.lookup;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.parser;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.parser.diagnose;x-friends:="org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.problem;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.apt.pluggable.core",
- org.eclipse.jdt.internal.compiler.tool;x-friends:="org.eclipse.jdt.compiler.tool.tests,org.eclipse.jdt.core",
- org.eclipse.jdt.internal.compiler.util;x-friends:="org.eclipse.jdt.core.internal.tools,org.eclipse.jdt.core, org.eclipse.jdt.apt.core"
+ org.eclipse.jdt.internal.antadapter;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.apt.dispatch;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.apt.model;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.apt.util;x-friends:="org.eclipse.jdt.apt.pluggable.core,org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.ast;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.batch;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.classfmt;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.codegen;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.env;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.flow;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.impl;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.lookup;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.parser;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.parser.diagnose;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.problem;x-friends:="org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.pluggable.core",
+ org.eclipse.jdt.internal.compiler.tool;x-friends:="org.eclipse.jdt.compiler.tool.tests,org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests",
+ org.eclipse.jdt.internal.compiler.util;x-friends:="org.eclipse.jdt.core.internal.tools,org.eclipse.jdt.core, org.eclipse.jdt.core.tests.model, org.eclipse.jdt.core.tests.compiler, org.eclipse.jdt.core.tests.builder, org.eclipse.jdt.core.tests.performance, org.eclipse.jdt.ui.tests, org.eclipse.jdt.apt.core"

org.eclipse.jdt.core.tests.builder/.settings/org.eclipse.jdt.core.prefs

@@ -37,7 +37,7 @@ org.eclipse.jdt.core.compiler.problem.deadCode=warning
 org.eclipse.jdt.core.compiler.problem.deprecation=warning
 org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=enabled
-org.eclipse.jdt.core.compiler.problem.discouragedReference=ignore
+org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
 org.eclipse.jdt.core.compiler.problem.emptyStatement=warning
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error

org.eclipse.jdt.core.tests.builder/src/org/eclipse/jdt/core/tests/builder/Bug530366Test.java

@@ -26,8 +26,6 @@
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.jdt.core.compiler.CategorizedProblem;
 import org.eclipse.jdt.core.tests.util.Util;
-import org.junit.internal.ArrayComparisonFailure;
-
 import junit.framework.Test;
 
 public class Bug530366Test extends BuilderTests {
@@ -138,7 +136,8 @@ private void expectProblems(IPath myClass2) {
 		expectingOnlySpecificProblemsFor(myClass2, expectedProblems);
 	}
 
-	private void assertEqualContents(byte[] expectedContents, byte[] actualContents) throws ArrayComparisonFailure {
+	@SuppressWarnings("restriction")
+	private void assertEqualContents(byte[] expectedContents, byte[] actualContents) throws org.junit.internal.ArrayComparisonFailure {
 		String failMessage =
 				String.join(System.lineSeparator()
 						, "Java builder overwrote existing class file, but should not have"

org.eclipse.jdt.core.tests.compiler/.settings/org.eclipse.jdt.core.prefs

@@ -37,7 +37,7 @@ org.eclipse.jdt.core.compiler.problem.deadCode=warning
 org.eclipse.jdt.core.compiler.problem.deprecation=warning
 org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=enabled
-org.eclipse.jdt.core.compiler.problem.discouragedReference=ignore
+org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
 org.eclipse.jdt.core.compiler.problem.emptyStatement=warning
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error

org.eclipse.jdt.core.tests.model/.settings/org.eclipse.jdt.core.prefs

@@ -37,7 +37,7 @@ org.eclipse.jdt.core.compiler.problem.deadCode=warning
 org.eclipse.jdt.core.compiler.problem.deprecation=warning
 org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=enabled
-org.eclipse.jdt.core.compiler.problem.discouragedReference=ignore
+org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
 org.eclipse.jdt.core.compiler.problem.emptyStatement=warning
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error

org.eclipse.jdt.core.tests.model/.settings/org.eclipse.jdt.ui.prefs

@@ -1,6 +1,6 @@
-#Thu Nov 04 13:39:05 EDT 2010
 eclipse.preferences.version=1
 editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
+sp_cleanup.add_all=false
 sp_cleanup.add_default_serial_version_id=true
 sp_cleanup.add_generated_serial_version_id=false
 sp_cleanup.add_missing_annotations=false
@@ -10,47 +10,137 @@ sp_cleanup.add_missing_nls_tags=false
 sp_cleanup.add_missing_override_annotations=true
 sp_cleanup.add_missing_override_annotations_interface_methods=true
 sp_cleanup.add_serial_version_id=false
+sp_cleanup.also_simplify_lambda=false
 sp_cleanup.always_use_blocks=true
 sp_cleanup.always_use_parentheses_in_expressions=false
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
+sp_cleanup.array_with_curly=false
+sp_cleanup.arrays_fill=false
+sp_cleanup.bitwise_conditional_expression=false
+sp_cleanup.boolean_literal=false
+sp_cleanup.boolean_value_rather_than_comparison=false
+sp_cleanup.break_loop=false
+sp_cleanup.collection_cloning=false
+sp_cleanup.comparing_on_criteria=false
+sp_cleanup.comparison_statement=false
+sp_cleanup.controlflow_merge=false
+sp_cleanup.convert_functional_interfaces=false
 sp_cleanup.convert_to_enhanced_for_loop=false
+sp_cleanup.convert_to_enhanced_for_loop_if_loop_var_used=false
+sp_cleanup.convert_to_switch_expressions=false
 sp_cleanup.correct_indentation=false
+sp_cleanup.do_while_rather_than_while=false
+sp_cleanup.double_negation=false
+sp_cleanup.else_if=false
+sp_cleanup.embedded_if=false
+sp_cleanup.evaluate_nullable=false
+sp_cleanup.extract_increment=false
 sp_cleanup.format_source_code=false
 sp_cleanup.format_source_code_changes_only=false
+sp_cleanup.hash=false
+sp_cleanup.if_condition=false
+sp_cleanup.insert_inferred_type_arguments=false
+sp_cleanup.instanceof=false
+sp_cleanup.instanceof_keyword=false
+sp_cleanup.invert_equals=false
+sp_cleanup.join=false
+sp_cleanup.lazy_logical_operator=false
 sp_cleanup.make_local_variable_final=false
 sp_cleanup.make_parameters_final=false
 sp_cleanup.make_private_fields_final=true
 sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=false
+sp_cleanup.map_cloning=false
+sp_cleanup.merge_conditional_blocks=false
+sp_cleanup.multi_catch=false
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=true
+sp_cleanup.no_string_creation=false
+sp_cleanup.no_super=false
+sp_cleanup.number_suffix=false
+sp_cleanup.objects_equals=false
 sp_cleanup.on_save_use_additional_actions=true
-sp_cleanup.organize_imports=false
+sp_cleanup.one_if_rather_than_duplicate_blocks_that_fall_through=false
+sp_cleanup.operand_factorization=false
+sp_cleanup.organize_imports=true
+sp_cleanup.overridden_assignment=false
+sp_cleanup.overridden_assignment_move_decl=false
+sp_cleanup.plain_replacement=false
+sp_cleanup.precompile_regex=false
+sp_cleanup.primitive_comparison=false
+sp_cleanup.primitive_parsing=false
+sp_cleanup.primitive_rather_than_wrapper=false
+sp_cleanup.primitive_serialization=false
+sp_cleanup.pull_out_if_from_if_else=false
+sp_cleanup.pull_up_assignment=false
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
+sp_cleanup.reduce_indentation=false
+sp_cleanup.redundant_comparator=false
+sp_cleanup.redundant_falling_through_block_end=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
+sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=true
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=false
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=false
 sp_cleanup.remove_unnecessary_nls_tags=false
 sp_cleanup.remove_unused_imports=false
 sp_cleanup.remove_unused_local_variables=false
+sp_cleanup.remove_unused_method_parameters=false
 sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.replace_deprecated_calls=false
+sp_cleanup.return_expression=false
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
+sp_cleanup.single_used_field=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
+sp_cleanup.standard_comparison=false
+sp_cleanup.static_inner_class=false
+sp_cleanup.strictly_equal_or_different=false
+sp_cleanup.stringbuffer_to_stringbuilder=false
+sp_cleanup.stringbuilder=false
+sp_cleanup.stringbuilder_for_local_vars=false
+sp_cleanup.stringconcat_stringbuffer_stringbuilder=false
+sp_cleanup.stringconcat_to_textblock=false
+sp_cleanup.substring=false
+sp_cleanup.switch=false
+sp_cleanup.system_property=false
+sp_cleanup.system_property_boolean=false
+sp_cleanup.system_property_file_encoding=false
+sp_cleanup.system_property_file_separator=false
+sp_cleanup.system_property_line_separator=false
+sp_cleanup.system_property_path_separator=false
+sp_cleanup.ternary_operator=false
+sp_cleanup.try_with_resource=false
+sp_cleanup.unlooped_while=false
+sp_cleanup.unreachable_block=false
 sp_cleanup.update_ibm_copyright_to_current_year=true
+sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=false
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
+sp_cleanup.use_lambda=false
 sp_cleanup.use_parentheses_in_expressions=false
+sp_cleanup.use_string_is_blank=false
 sp_cleanup.use_this_for_non_static_field_access=false
 sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
+sp_cleanup.use_unboxing=false
+sp_cleanup.use_var=false
+sp_cleanup.useless_continue=false
+sp_cleanup.useless_return=false
+sp_cleanup.valueof_rather_than_instantiation=false

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/formatter/DecodeCodeFormatterPreferences.java

@@ -27,7 +27,6 @@
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.SAXParser;
 
-import org.eclipse.core.internal.runtime.XmlProcessorFactory;
 import org.xml.sax.Attributes;
 import org.xml.sax.SAXException;
 import org.xml.sax.helpers.DefaultHandler;
@@ -63,7 +62,8 @@ public static Map decodeCodeFormatterOptions(String fileName) {
 
 	public static Map decodeCodeFormatterOptions(String fileName, String profileName) {
 		try {
-			SAXParser saxParser = XmlProcessorFactory.createSAXParserWithErrorOnDOCTYPE();
+			@SuppressWarnings("restriction")
+			SAXParser saxParser = org.eclipse.core.internal.runtime.XmlProcessorFactory.createSAXParserWithErrorOnDOCTYPE();
 			final DecodeCodeFormatterPreferences preferences = new DecodeCodeFormatterPreferences(profileName);
 			saxParser.parse(new File(fileName), preferences);
 			return preferences.getEntries();
@@ -89,7 +89,8 @@ public static Map decodeCodeFormatterOptions(String zipFileName, String zipEntry
 				return null;
 			}
 			inputStream = new BufferedInputStream(zipFile.getInputStream(zipEntry));
-			SAXParser saxParser = XmlProcessorFactory.createSAXParserWithErrorOnDOCTYPE();
+			@SuppressWarnings("restriction")
+			SAXParser saxParser = org.eclipse.core.internal.runtime.XmlProcessorFactory.createSAXParserWithErrorOnDOCTYPE();
 			final DecodeCodeFormatterPreferences preferences = new DecodeCodeFormatterPreferences(profileName);
 			saxParser.parse(inputStream, preferences);
 			return preferences.getEntries();

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java

@@ -34,7 +34,6 @@
 import java.util.TreeMap;
 import java.util.stream.Collectors;
 
-import org.eclipse.core.internal.resources.CharsetDeltaJob;
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IFolder;
@@ -3993,9 +3992,10 @@ protected IPath getJRE9Path() {
 		return new Path(System.getProperty("java.home") + "/lib/jrt-fs.jar");
 	}
 
+	@SuppressWarnings("restriction")
 	public void waitForCharsetDeltaJob() throws CoreException {
 		try {
-			Job.getJobManager().join(CharsetDeltaJob.FAMILY_CHARSET_DELTA, null);
+			Job.getJobManager().join(org.eclipse.core.internal.resources.CharsetDeltaJob.FAMILY_CHARSET_DELTA, null);
 		} catch (OperationCanceledException | InterruptedException e) {
 			throw new CoreException(new Status(IStatus.ERROR, JavaCore.PLUGIN_ID, e.getMessage(), e));
 		}

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/JavaCorePreferenceModifyListenerTest.java

@@ -16,9 +16,6 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 
-import junit.framework.Test;
-
-import org.eclipse.core.internal.preferences.EclipsePreferences;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.ConfigurationScope;
@@ -28,6 +25,8 @@
 import org.eclipse.jdt.core.tests.junit.extension.TestCase;
 import org.osgi.service.prefs.BackingStoreException;
 
+import junit.framework.Test;
+
 public class JavaCorePreferenceModifyListenerTest extends TestCase {
 	private static final String NODE_NAME = "bug419219";
 	private static final String KEY = "someKey";
@@ -57,7 +56,8 @@ public void testPreApply() throws BackingStoreException, CoreException {
 		assertTrue(service.applyPreferences(exported).isOK());
 
 		// verify that the node is not modified
-		String debugString = ((EclipsePreferences) exported.node("/")).toDeepDebugString();
+		@SuppressWarnings("restriction")
+		String debugString = ((org.eclipse.core.internal.preferences.EclipsePreferences) exported.node("/")).toDeepDebugString();
 		assertFalse(debugString, exported.nodeExists("instance/org.eclipse.jdt.core"));
 		assertFalse(debugString, exported.nodeExists("/instance/org.eclipse.jdt.core"));
 	}