Bug 570025: [RJ-Dbg] Improve TracepointStatesUpdate.toString to
simplify debugging

Change-Id: I6359d37622a85d952e561339d14e9856b98c98e5
diff --git a/core/org.eclipse.statet.rj.server-tests/.classpath b/core/org.eclipse.statet.rj.server-tests/.classpath
new file mode 100644
index 0000000..322c4fc
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.classpath
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="module" value="true"/>
+			<attribute name="annotationpath" value="/org.eclipse.statet/eea/"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins">
+		<attributes>
+			<attribute name="annotationpath" value="/org.eclipse.statet/eea/"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src">
+		<attributes>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>
diff --git a/core/org.eclipse.statet.rj.server-tests/.gitignore b/core/org.eclipse.statet.rj.server-tests/.gitignore
new file mode 100644
index 0000000..b83d222
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.gitignore
@@ -0,0 +1 @@
+/target/
diff --git a/core/org.eclipse.statet.rj.server-tests/.project b/core/org.eclipse.statet.rj.server-tests/.project
new file mode 100644
index 0000000..1d612a2
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.statet.rj.server-tests</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.resources.prefs b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..99f26c0
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.runtime.prefs b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.runtime.prefs
new file mode 100644
index 0000000..5a0ad22
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.core.runtime.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+line.separator=\n
diff --git a/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.core.prefs b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000..db488b8
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,513 @@
+eclipse.preferences.version=1
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+org.eclipse.jdt.core.codeComplete.argumentSuffixes=
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+org.eclipse.jdt.core.codeComplete.localSuffixes=
+org.eclipse.jdt.core.codeComplete.staticFieldPrefixes=
+org.eclipse.jdt.core.codeComplete.staticFieldSuffixes=
+org.eclipse.jdt.core.codeComplete.staticFinalFieldPrefixes=
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+org.eclipse.jdt.core.compiler.annotation.nonnullbydefault=org.eclipse.statet.jcommons.lang.NonNullByDefault
+org.eclipse.jdt.core.compiler.annotation.nonnullbydefault.secondary=org.eclipse.jdt.annotation.NonNullByDefault
+org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.statet.jcommons.lang.Nullable
+org.eclipse.jdt.core.compiler.annotation.nullable.secondary=org.eclipse.jdt.annotation.Nullable
+org.eclipse.jdt.core.compiler.annotation.nullanalysis=enabled
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+org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration=do not insert
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+org.eclipse.jdt.core.formatter.join_lines_in_comments=true
+org.eclipse.jdt.core.formatter.join_wrapped_lines=true
+org.eclipse.jdt.core.formatter.keep_annotation_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_anonymous_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_code_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line=false
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+org.eclipse.jdt.core.formatter.keep_enum_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_if_then_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_lambda_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_loop_body_block_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_method_body_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_record_constructor_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_record_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.keep_simple_do_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_for_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_simple_getter_setter_on_one_line=false
+org.eclipse.jdt.core.formatter.keep_simple_while_body_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line=false
+org.eclipse.jdt.core.formatter.keep_type_declaration_on_one_line=one_line_never
+org.eclipse.jdt.core.formatter.lineSplit=100
+org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column=false
+org.eclipse.jdt.core.formatter.number_of_blank_lines_after_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_code_block=0
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body=-1
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_code_block=-1
+org.eclipse.jdt.core.formatter.number_of_blank_lines_at_end_of_method_body=-1
+org.eclipse.jdt.core.formatter.number_of_blank_lines_before_code_block=0
+org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve=2
+org.eclipse.jdt.core.formatter.parentheses_positions_in_annotation=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_catch_clause=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_enum_constant_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_for_statment=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_if_while_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_lambda_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_delcaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_method_invocation=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_record_declaration=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_switch_statement=common_lines
+org.eclipse.jdt.core.formatter.parentheses_positions_in_try_clause=common_lines
+org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line=true
+org.eclipse.jdt.core.formatter.tabulation.char=tab
+org.eclipse.jdt.core.formatter.tabulation.size=4
+org.eclipse.jdt.core.formatter.text_block_indentation=0
+org.eclipse.jdt.core.formatter.use_on_off_tags=false
+org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations=false
+org.eclipse.jdt.core.formatter.wrap_before_additive_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_assertion_message_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_assignment_operator=false
+org.eclipse.jdt.core.formatter.wrap_before_bitwise_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_conditional_operator=false
+org.eclipse.jdt.core.formatter.wrap_before_logical_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_multiplicative_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch=true
+org.eclipse.jdt.core.formatter.wrap_before_relational_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_shift_operator=true
+org.eclipse.jdt.core.formatter.wrap_before_string_concatenation=true
+org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested=true
+org.eclipse.jdt.core.javaFormatter=org.eclipse.jdt.core.defaultJavaFormatter
diff --git a/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.ui.prefs b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.ui.prefs
new file mode 100644
index 0000000..08d6901
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/.settings/org.eclipse.jdt.ui.prefs
@@ -0,0 +1,189 @@
+cleanup.add_default_serial_version_id=true
+cleanup.add_generated_serial_version_id=false
+cleanup.add_missing_annotations=true
+cleanup.add_missing_deprecated_annotations=true
+cleanup.add_missing_methods=false
+cleanup.add_missing_nls_tags=false
+cleanup.add_missing_override_annotations=true
+cleanup.add_missing_override_annotations_interface_methods=true
+cleanup.add_remove_all=true
+cleanup.add_serial_version_id=false
+cleanup.always_use_blocks=true
+cleanup.always_use_parentheses_in_expressions=true
+cleanup.always_use_this_for_non_static_field_access=true
+cleanup.always_use_this_for_non_static_method_access=false
+cleanup.arrays_fill=true
+cleanup.bitwise_conditional_expression=false
+cleanup.boolean_literal=true
+cleanup.collection_cloning=false
+cleanup.convert_functional_interfaces=false
+cleanup.convert_to_enhanced_for_loop=false
+cleanup.convert_to_enhanced_for_loop_if_loop_var_used=false
+cleanup.convert_to_switch_expressions=false
+cleanup.correct_indentation=false
+cleanup.embedded_if=false
+cleanup.format_source_code=false
+cleanup.format_source_code_changes_only=false
+cleanup.if_condition=true
+cleanup.insert_inferred_type_arguments=false
+cleanup.instanceof=true
+cleanup.lazy_logical_operator=false
+cleanup.make_local_variable_final=true
+cleanup.make_parameters_final=true
+cleanup.make_private_fields_final=true
+cleanup.make_type_abstract_if_missing_method=false
+cleanup.make_variable_declarations_final=true
+cleanup.map_cloning=false
+cleanup.merge_conditional_blocks=false
+cleanup.never_use_blocks=false
+cleanup.never_use_parentheses_in_expressions=false
+cleanup.no_string_creation=false
+cleanup.no_super=false
+cleanup.number_suffix=true
+cleanup.objects_equals=false
+cleanup.organize_imports=true
+cleanup.precompile_regex=true
+cleanup.push_down_negation=false
+cleanup.qualify_static_field_accesses_with_declaring_class=false
+cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
+cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=false
+cleanup.qualify_static_member_accesses_with_declaring_class=true
+cleanup.qualify_static_method_accesses_with_declaring_class=false
+cleanup.redundant_falling_through_block_end=false
+cleanup.remove_private_constructors=true
+cleanup.remove_redundant_modifiers=false
+cleanup.remove_redundant_semicolons=true
+cleanup.remove_redundant_type_arguments=true
+cleanup.remove_trailing_whitespaces=false
+cleanup.remove_trailing_whitespaces_all=true
+cleanup.remove_trailing_whitespaces_ignore_empty=false
+cleanup.remove_unnecessary_array_creation=true
+cleanup.remove_unnecessary_casts=true
+cleanup.remove_unnecessary_nls_tags=true
+cleanup.remove_unused_imports=true
+cleanup.remove_unused_local_variables=false
+cleanup.remove_unused_private_fields=true
+cleanup.remove_unused_private_members=false
+cleanup.remove_unused_private_methods=true
+cleanup.remove_unused_private_types=true
+cleanup.simplify_lambda_expression_and_method_ref=false
+cleanup.sort_members=false
+cleanup.sort_members_all=false
+cleanup.use_anonymous_class_creation=false
+cleanup.use_autoboxing=false
+cleanup.use_blocks=true
+cleanup.use_blocks_only_for_return_and_throw=false
+cleanup.use_directly_map_method=false
+cleanup.use_lambda=false
+cleanup.use_parentheses_in_expressions=false
+cleanup.use_this_for_non_static_field_access=true
+cleanup.use_this_for_non_static_field_access_only_if_necessary=false
+cleanup.use_this_for_non_static_method_access=true
+cleanup.use_this_for_non_static_method_access_only_if_necessary=true
+cleanup.use_unboxing=false
+cleanup.use_var=false
+cleanup.useless_continue=false
+cleanup.useless_return=false
+cleanup_profile=_StatET
+cleanup_settings_version=2
+eclipse.preferences.version=1
+editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
+formatter_profile=_StatET
+formatter_settings_version=20
+org.eclipse.jdt.ui.exception.name=e
+org.eclipse.jdt.ui.gettersetter.use.is=true
+org.eclipse.jdt.ui.ignorelowercasenames=true
+org.eclipse.jdt.ui.importorder=\#java;\#;\#org.eclipse.statet.jcommons;\#org.eclipse.statet.ecommons;\#org.eclipse.statet;java;javax;com.ibm.icu;org.osgi;org.eclipse;;org.eclipse.statet.jcommons;org.eclipse.statet.ecommons;org.eclipse.statet;
+org.eclipse.jdt.ui.javadoc=true
+org.eclipse.jdt.ui.keywordthis=true
+org.eclipse.jdt.ui.ondemandthreshold=99
+org.eclipse.jdt.ui.overrideannotation=true
+org.eclipse.jdt.ui.staticondemandthreshold=99
+org.eclipse.jdt.ui.text.custom_code_templates=<?xml version\="1.0" encoding\="UTF-8" standalone\="no"?><templates><template autoinsert\="true" context\="gettercomment_context" deleted\="false" description\="Comment for getter method" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.gettercomment" name\="gettercomment">/**\n * @return the ${bare_field_name}\n */</template><template autoinsert\="true" context\="settercomment_context" deleted\="false" description\="Comment for setter method" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.settercomment" name\="settercomment">/**\n * @param ${param} the ${bare_field_name} to set\n */</template><template autoinsert\="true" context\="constructorcomment_context" deleted\="false" description\="Comment for created constructors" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.constructorcomment" name\="constructorcomment">/**\n * ${tags}\n */</template><template autoinsert\="true" context\="filecomment_context" deleted\="false" description\="Comment for created Java files" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.filecomment" name\="filecomment">/*\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\#\n \# Copyright (c) ${year} ${user} and others.\n \# \n \# This program and the accompanying materials are made available under the\n \# terms of the Eclipse Public License 2.0 which is available at\n \# https\://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0\n \# which is available at https\://www.apache.org/licenses/LICENSE-2.0.\n \# \n \# SPDX-License-Identifier\: EPL-2.0 OR Apache-2.0\n \# \n \# Contributors\:\n \#     ${user} - initial API and implementation\n \#\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=\=*/</template><template autoinsert\="true" context\="typecomment_context" deleted\="false" description\="Comment for created types" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.typecomment" name\="typecomment">/**\n * \n * ${tags}\n */</template><template autoinsert\="true" context\="fieldcomment_context" deleted\="false" description\="Comment for fields" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.fieldcomment" name\="fieldcomment">/**\n * \n */</template><template autoinsert\="true" context\="methodcomment_context" deleted\="false" description\="Comment for non-overriding methods" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.methodcomment" name\="methodcomment">/**\n * ${tags}\n */</template><template autoinsert\="true" context\="modulecomment_context" deleted\="false" description\="Comment for modules" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.modulecomment" name\="modulecomment">/**\n *\n * ${tags}\n */</template><template autoinsert\="true" context\="overridecomment_context" deleted\="false" description\="Comment for overriding methods" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.overridecomment" name\="overridecomment"/><template autoinsert\="true" context\="delegatecomment_context" deleted\="false" description\="Comment for delegate methods" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.delegatecomment" name\="delegatecomment">/**\n * ${tags}\n * ${see_to_target}\n */</template><template autoinsert\="true" context\="newtype_context" deleted\="false" description\="Newly created files" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.newtype" name\="newtype">${filecomment}\n\n${package_declaration}\n\n${typecomment}\n${type_declaration}</template><template autoinsert\="true" context\="classbody_context" deleted\="false" description\="Code in new class type bodies" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.classbody" name\="classbody">\n</template><template autoinsert\="true" context\="interfacebody_context" deleted\="false" description\="Code in new interface type bodies" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.interfacebody" name\="interfacebody">\n</template><template autoinsert\="true" context\="enumbody_context" deleted\="false" description\="Code in new enum type bodies" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.enumbody" name\="enumbody">\n</template><template autoinsert\="true" context\="recordbody_context" deleted\="false" description\="Code in new record type bodies" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.recordbody" name\="recordbody">\n</template><template autoinsert\="true" context\="annotationbody_context" deleted\="false" description\="Code in new annotation type bodies" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.annotationbody" name\="annotationbody">\n</template><template autoinsert\="true" context\="catchblock_context" deleted\="false" description\="Code in new catch blocks" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.catchblock" name\="catchblock">// ${todo} Auto-generated catch block\n${exception_var}.printStackTrace();</template><template autoinsert\="true" context\="methodbody_context" deleted\="false" description\="Code in created method stubs" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.methodbody" name\="methodbody">// ${todo} Auto-generated method stub\n${body_statement}</template><template autoinsert\="true" context\="constructorbody_context" deleted\="false" description\="Code in created constructor stubs" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.constructorbody" name\="constructorbody">${body_statement}\n// ${todo} Auto-generated constructor stub</template><template autoinsert\="true" context\="getterbody_context" deleted\="false" description\="Code in created getters" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.getterbody" name\="getterbody">return ${field};</template><template autoinsert\="true" context\="setterbody_context" deleted\="false" description\="Code in created setters" enabled\="true" id\="org.eclipse.jdt.ui.text.codetemplates.setterbody" name\="setterbody">${field} \= ${param};</template></templates>
+sp_cleanup.add_default_serial_version_id=true
+sp_cleanup.add_generated_serial_version_id=false
+sp_cleanup.add_missing_annotations=true
+sp_cleanup.add_missing_deprecated_annotations=true
+sp_cleanup.add_missing_methods=false
+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_remove_all=false
+sp_cleanup.add_serial_version_id=false
+sp_cleanup.always_use_blocks=true
+sp_cleanup.always_use_parentheses_in_expressions=true
+sp_cleanup.always_use_this_for_non_static_field_access=true
+sp_cleanup.always_use_this_for_non_static_method_access=false
+sp_cleanup.arrays_fill=false
+sp_cleanup.bitwise_conditional_expression=false
+sp_cleanup.boolean_literal=false
+sp_cleanup.collection_cloning=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.embedded_if=false
+sp_cleanup.format_source_code=false
+sp_cleanup.format_source_code_changes_only=false
+sp_cleanup.if_condition=false
+sp_cleanup.insert_inferred_type_arguments=false
+sp_cleanup.instanceof=false
+sp_cleanup.lazy_logical_operator=false
+sp_cleanup.make_local_variable_final=true
+sp_cleanup.make_parameters_final=true
+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.never_use_blocks=false
+sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.no_string_creation=false
+sp_cleanup.no_super=false
+sp_cleanup.number_suffix=true
+sp_cleanup.objects_equals=false
+sp_cleanup.on_save_use_additional_actions=true
+sp_cleanup.organize_imports=true
+sp_cleanup.precompile_regex=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=false
+sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
+sp_cleanup.qualify_static_method_accesses_with_declaring_class=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=true
+sp_cleanup.remove_redundant_type_arguments=true
+sp_cleanup.remove_trailing_whitespaces=false
+sp_cleanup.remove_trailing_whitespaces_all=false
+sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
+sp_cleanup.remove_unnecessary_casts=true
+sp_cleanup.remove_unnecessary_nls_tags=false
+sp_cleanup.remove_unused_imports=false
+sp_cleanup.remove_unused_local_variables=false
+sp_cleanup.remove_unused_private_fields=false
+sp_cleanup.remove_unused_private_members=false
+sp_cleanup.remove_unused_private_methods=false
+sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
+sp_cleanup.sort_members=false
+sp_cleanup.sort_members_all=false
+sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
+sp_cleanup.use_blocks=true
+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_this_for_non_static_field_access=true
+sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=false
+sp_cleanup.use_this_for_non_static_method_access=true
+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
diff --git a/core/org.eclipse.statet.rj.server-tests/META-INF/MANIFEST.MF b/core/org.eclipse.statet.rj.server-tests/META-INF/MANIFEST.MF
new file mode 100644
index 0000000..3af88f0
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/META-INF/MANIFEST.MF
@@ -0,0 +1,14 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-SymbolicName: org.eclipse.statet.rj.server.tests
+Automatic-Module-Name: org.eclipse.statet.rj.server.tests
+Bundle-Version: 4.3.0.qualifier
+Bundle-Vendor: Eclipse StatET
+Bundle-Name: StatET RJ - Server - Tests  (Incubation)
+Fragment-Host: org.eclipse.statet.rj.server
+Bundle-RequiredExecutionEnvironment: JavaSE-11
+Import-Package: org.junit.jupiter.api;version="[5.6.0,6.0.0)",
+ org.junit.jupiter.api.function;version="[5.6.0,6.0.0)",
+ org.junit.jupiter.params;version="[5.6.0,6.0.0)",
+ org.junit.jupiter.params.provider;version="[5.6.0,6.0.0)",
+ org.opentest4j;version="[1.2.0,2.0.0)"
diff --git a/core/org.eclipse.statet.rj.server-tests/about.html b/core/org.eclipse.statet.rj.server-tests/about.html
new file mode 100644
index 0000000..f094738
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/about.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+		"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+<title>About</title>
+</head>
+<body lang="EN-US">
+<h2>About This Content</h2>
+
+<p>January 1, 2019</p>
+<h3>License</h3>
+
+<p>The Eclipse Foundation makes available all content in this plug-in (&quot;Content&quot;). Unless
+	otherwise indicated below, the Content is provided to you under the terms and conditions of the
+	Eclipse Public License Version 2.0 (&quot;EPL&quot;), or the Apache License, Version 2.0 (AL).
+	A copy of the EPL is available at <a href="https://www.eclipse.org/legal/epl-2.0"
+	>https://www.eclipse.org/legal/epl-2.0</a>. For purposes of the EPL, &quot;Program&quot; will
+	mean the Content. A copy of the AL is available at <a href="https://www.apache.org/licenses/LICENSE-2.0"
+	>https://www.apache.org/licenses/LICENSE-2.0</a>.</p>
+
+<p>If you did not receive this Content directly from the Eclipse Foundation, the Content is being
+	redistributed by another party (&quot;Redistributor&quot;) and different terms and conditions
+	may apply to your use of any object code in the Content. Check the Redistributor's license that
+	was provided with the Content. If no such license exists, contact the Redistributor. Unless
+	otherwise indicated below, the terms and conditions of the EPL or AL still apply to any source
+	code in the Content and such source code may be obtained at <a href="https://www.eclipse.org/"
+	>https://www.eclipse.org</a>.</p>
+
+</body>
+</html>
diff --git a/core/org.eclipse.statet.rj.server-tests/build.properties b/core/org.eclipse.statet.rj.server-tests/build.properties
new file mode 100644
index 0000000..239dd55
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/build.properties
@@ -0,0 +1,8 @@
+source..= src/
+output..= target/classes/
+javacDefaultEncoding..= UTF-8
+
+bin.includes= META-INF/,\
+              .,\
+              about.html
+src.includes= .settings/org.eclipse.core.resources.prefs
diff --git a/core/org.eclipse.statet.rj.server-tests/src/org/eclipse/statet/rj/server/dgb/TracepointsTest.java b/core/org.eclipse.statet.rj.server-tests/src/org/eclipse/statet/rj/server/dgb/TracepointsTest.java
new file mode 100644
index 0000000..6744be7
--- /dev/null
+++ b/core/org.eclipse.statet.rj.server-tests/src/org/eclipse/statet/rj/server/dgb/TracepointsTest.java
@@ -0,0 +1,58 @@
+/*=============================================================================#
+ # Copyright (c) 2021 Stephan Wahlbrink and others.
+ # 
+ # This program and the accompanying materials are made available under the
+ # terms of the Eclipse Public License 2.0 which is available at
+ # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+ # which is available at https://www.apache.org/licenses/LICENSE-2.0.
+ # 
+ # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+ # 
+ # Contributors:
+ #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
+ #=============================================================================*/
+
+package org.eclipse.statet.rj.server.dgb;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import org.eclipse.statet.jcommons.lang.NonNullByDefault;
+
+import org.eclipse.statet.rj.server.dbg.Tracepoint;
+import org.eclipse.statet.rj.server.dbg.Tracepoints;
+
+
+@NonNullByDefault
+public class TracepointsTest {
+	
+	
+	public TracepointsTest() {
+	}
+	
+	
+	@ParameterizedTest
+	@ValueSource(longs= { 0, 1234, 5938098098L, -1L })
+	public void appendId(final long id) {
+		final StringBuilder sb= new StringBuilder();
+		Tracepoints.append(id, sb);
+		assertEquals(String.format("%1$016X", id), sb.toString());
+	}
+	
+	@Test
+	public void toTypeName() {
+		assertEquals("FB", Tracepoints.getTypeName(Tracepoint.TYPE_FB));
+		assertEquals("LB", Tracepoints.getTypeName(Tracepoint.TYPE_LB));
+		assertEquals("TB", Tracepoints.getTypeName(Tracepoint.TYPE_TB));
+		assertEquals("EB", Tracepoints.getTypeName(Tracepoint.TYPE_EB));
+		
+		assertEquals("DELETED", Tracepoints.getTypeName(Tracepoint.TYPE_DELETED));
+		
+		assertEquals("unknown: 0x00001234", Tracepoints.getTypeName(0x0_0000_1234));
+	}
+	
+	
+}
diff --git a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointState.java b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointState.java
index cbd0b07..21dd0e7 100644
--- a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointState.java
+++ b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointState.java
@@ -16,20 +16,26 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
+import org.eclipse.statet.jcommons.lang.NonNullByDefault;
+import org.eclipse.statet.jcommons.lang.Nullable;
+import org.eclipse.statet.jcommons.lang.ObjectUtils.ToStringBuilder;
+
 import org.eclipse.statet.rj.data.RJIO;
 import org.eclipse.statet.rj.data.RJIOExternalizable;
 
 
+@NonNullByDefault
 public class TracepointState implements Tracepoint, Comparable<TracepointState>, RJIOExternalizable {
 	
 	
 	static final List<TracepointState> readList(final RJIO io) throws IOException {
 		final int l= io.readInt();
 		final List<TracepointState> list= new ArrayList<>(l);
-		String filePath= null;
-		String elementId= null;
+		String currentFilePath= null;
+		String currentElementId= null;
 		for (int i= 0; i < l; i++) {
 			final TracepointState state= new TracepointState();
 			list.add(state);
@@ -37,20 +43,20 @@
 			state.id= io.readLong();
 			state.filePath= io.readString();
 			if (state.filePath != null) {
-				filePath= state.filePath;
+				currentFilePath= state.filePath;
 			}
 			else {
-				state.filePath= filePath;
+				state.filePath= currentFilePath;
 			}
 			if (state.type == TYPE_DELETED) {
 				continue;
 			}
 			state.elementId= io.readString();
 			if (state.elementId != null) {
-				elementId= state.elementId;
+				currentElementId= state.elementId;
 			}
 			else {
-				state.elementId= elementId;
+				state.elementId= currentElementId;
 			}
 			state.index= io.readIntArray();
 			state.elementLabel= io.readString();
@@ -63,28 +69,28 @@
 	static final void writeList(final List<TracepointState> list, final RJIO io) throws IOException {
 		final int l= list.size();
 		io.writeInt(l);
-		String filePath= null;
-		String elementId= null;
+		String currentFilePath= null;
+		String currentElementId= null;
 		for (int i= 0; i < l; i++) {
 			final TracepointState state= list.get(i);
 			io.writeInt(state.type);
 			io.writeLong(state.id);
-			if (state.filePath.equals(filePath)) {
+			if (state.filePath.equals(currentFilePath)) {
 				io.writeString(null);
 			}
 			else {
-				filePath= state.filePath;
-				io.writeString(filePath);
+				currentFilePath= state.filePath;
+				io.writeString(currentFilePath);
 			}
 			if (state.type == TYPE_DELETED) {
 				continue;
 			}
-			if (state.elementId.equals(elementId)) {
+			if (state.elementId.equals(currentElementId)) {
 				io.writeString(null);
 			}
 			else {
-				elementId= state.elementId;
-				io.writeString(elementId);
+				currentElementId= state.elementId;
+				io.writeString(currentElementId);
 			}
 			io.writeIntArray(state.index, state.index.length);
 			io.writeString(state.elementLabel);
@@ -116,14 +122,14 @@
 	private String elementId;
 	private int[] index;
 	
-	protected String elementLabel;
+	protected @Nullable String elementLabel;
 	protected int flags;
-	protected String expr;
+	protected @Nullable String expr;
 	
 	
 	public TracepointState(final int type,
 			final String filePath, final long id, final String elementId, final int[] index,
-			final String elementLabel, final int flags, final String expr) {
+			final @Nullable String elementLabel, final int flags, final @Nullable String expr) {
 		if (filePath == null || elementId == null || index == null) {
 			throw new NullPointerException();
 		}
@@ -139,7 +145,7 @@
 	
 	public TracepointState(final int type,
 			final String filePath, final long id, final String elementId,
-			final String elementLabel, final int flags, final String expr) {
+			final @Nullable String elementLabel, final int flags, final @Nullable String expr) {
 		if (filePath == null || elementId == null) {
 			throw new NullPointerException();
 		}
@@ -153,6 +159,7 @@
 		this.expr= expr;
 	}
 	
+	@SuppressWarnings("null")
 	public TracepointState(final int type,
 			final String filePath, final long id) {
 		if (type != TYPE_DELETED) {
@@ -163,6 +170,7 @@
 		this.id= id;
 	}
 	
+	@SuppressWarnings("null")
 	private TracepointState() {
 	}
 	
@@ -229,7 +237,7 @@
 		return ((this.flags & FLAG_ENABLED) != 0);
 	}
 	
-	public String getElementLabel() {
+	public @Nullable String getElementLabel() {
 		return this.elementLabel;
 	}
 	
@@ -237,7 +245,7 @@
 		return this.flags;
 	}
 	
-	public String getExpr() {
+	public @Nullable String getExpr() {
 		return this.expr;
 	}
 	
@@ -268,20 +276,34 @@
 	
 	@Override
 	public int hashCode() {
-		return (int) (this.filePath.hashCode() * this.id);
+		return (int)(this.filePath.hashCode() * this.id);
 	}
 	
 	@Override
-	public boolean equals(final Object obj) {
+	public boolean equals(final @Nullable Object obj) {
 		if (this == obj) {
 			return true;
 		}
-		if (!(obj instanceof TracepointState)) {
-			return false;
+		if (obj instanceof TracepointState) {
+			final TracepointState other= (TracepointState)obj;
+			return (this.id == other.id
+					&& this.filePath.equals(other.filePath) );
 		}
-		final TracepointState other= (TracepointState) obj;
-		return (this.id == other.id
-				&& this.filePath.equals(other.filePath) );
+		return false;
+	}
+	
+	@Override
+	public String toString() {
+		final ToStringBuilder sb= new ToStringBuilder(TracepointState.class);
+		Tracepoints.append(this.id, sb.getStringBuilder());
+		sb.append(" in ");
+		sb.append('\'', this.filePath, '\'');
+		sb.addProp("type", Tracepoints.getTypeName(this.type));
+		if (this.type != TYPE_DELETED) {
+			sb.addProp("elementId", this.elementId);
+			sb.addProp("index", Arrays.toString(this.index));
+		}
+		return sb.toString();
 	}
 	
 }
diff --git a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointStatesUpdate.java b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointStatesUpdate.java
index 6b7269c..023ea64 100644
--- a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointStatesUpdate.java
+++ b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/TracepointStatesUpdate.java
@@ -18,6 +18,7 @@
 import java.util.List;
 
 import org.eclipse.statet.jcommons.lang.NonNullByDefault;
+import org.eclipse.statet.jcommons.lang.ObjectUtils.ToStringBuilder;
 
 import org.eclipse.statet.rj.data.RJIO;
 import org.eclipse.statet.rj.data.RJIOExternalizable;
@@ -61,4 +62,13 @@
 		return this.states;
 	}
 	
+	
+	@Override
+	public String toString() {
+		final ToStringBuilder sb= new ToStringBuilder(TracepointStatesUpdate.class, getClass());
+		sb.addProp("reset", getReset());
+		sb.addProp("states", getStates());
+		return sb.toString();
+	}
+	
 }
diff --git a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/Tracepoints.java b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/Tracepoints.java
index 6cfcd46..4075883 100644
--- a/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/Tracepoints.java
+++ b/core/org.eclipse.statet.rj.server/src/org/eclipse/statet/rj/server/dbg/Tracepoints.java
@@ -304,6 +304,23 @@
 		}
 	}
 	
+	public static final String getTypeName(final int type) {
+		switch (type) {
+		case Tracepoint.TYPE_FB:
+			return "FB";
+		case Tracepoint.TYPE_LB:
+			return "LB";
+		case Tracepoint.TYPE_TB:
+			return "TB";
+		case Tracepoint.TYPE_EB:
+			return "EB";
+		case Tracepoint.TYPE_DELETED:
+			return "DELETED";
+		default:
+			return String.format("unknown: 0x%1$08X", type);
+		}
+	}
+	
 	
 	private Tracepoints() {}
 	
diff --git a/core/pom.xml b/core/pom.xml
index f515857..9d8e5ad 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -34,6 +34,7 @@
 		<module>org.eclipse.statet.rj.data</module>
 		<module>org.eclipse.statet.rj.data-tests</module>
 		<module>org.eclipse.statet.rj.server</module>
+		<module>org.eclipse.statet.rj.server-tests</module>
 		<module>org.eclipse.statet.rj.server.remotetools</module>
 		<module>org.eclipse.statet.rj.server.rpkg</module>
 		<module>org.eclipse.statet.rj.services.core</module>