Bug 581848 - [Releng] Revert patches to move to Java 17 as it breaks Papyrus

Change-Id: I62f9d7bcb2f6750c4e97ce292423281c6c3c598b
Signed-off-by: Quentin Le Menez <quentin.lemenez@cea.fr>

18 files changed, 30 insertions, 30 deletions

diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.classpath
index b5e203ff5c7..0fa64c8e5fc 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.classpath
@@ -2,7 +2,7 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="src-gen"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/META-INF/MANIFEST.MF
index 7fd36173688..f318f189ac5 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common.ui/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@ Export-Package: org.eclipse.papyrus.uml.alf.ui.contentassist
 Bundle-ActivationPolicy: lazy
 Bundle-Localization: plugin
 Bundle-Name: %pluginName
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Require-Bundle: org.eclipse.papyrus.uml.alf.common;bundle-version="[3.0.0,4.0.0)",
  org.eclipse.uml2.uml;bundle-version="[5.5.0,6.0.0)",
  org.eclipse.xtext.ui;bundle-version="[2.22.0,3.0.0)",
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.classpath
index 946fb3d346f..ad5e13cce77 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.classpath
@@ -1,6 +1,6 @@
 <?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-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="src-gen"/>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/META-INF/MANIFEST.MF
index 354d9e843ef..014b5d38b6b 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.common/META-INF/MANIFEST.MF
@@ -15,5 +15,5 @@ Bundle-Name: %pluginName
 Bundle-ManifestVersion: 2
 Import-Package: org.apache.log4j;version="[1.2.0,2.0.0)"
 Bundle-SymbolicName: org.eclipse.papyrus.uml.alf.common;singleton:=true
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Automatic-Module-Name: org.eclipse.papyrus.uml.alf.common
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.classpath
index 81fe078c20c..e801ebfb468 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.classpath
@@ -1,6 +1,6 @@
 <?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-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/META-INF/MANIFEST.MF
index 758ecbb992d..6e90ca0a6f4 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.libraries/META-INF/MANIFEST.MF
@@ -13,5 +13,5 @@ Bundle-Name: ALF Libraries
 Bundle-ManifestVersion: 2
 Bundle-Activator: org.eclipse.papyrus.uml.alf.libraries.AlfLibrariesActivator
 Bundle-SymbolicName: org.eclipse.papyrus.uml.alf.libraries;singleton:=true
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Automatic-Module-Name: org.eclipse.papyrus.uml.alf.libraries
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.classpath
index 81fe078c20c..e801ebfb468 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.classpath
@@ -1,6 +1,6 @@
 <?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-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/META-INF/MANIFEST.MF
index a9a25cf6076..65efaf55215 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.to.fuml/META-INF/MANIFEST.MF
@@ -10,5 +10,5 @@ Bundle-Name: Alf to fUML transformation
 Bundle-ManifestVersion: 2
 Bundle-Activator: org.eclipse.papyrus.uml.alf.to.fuml.AlfMappingActivator
 Bundle-SymbolicName: org.eclipse.papyrus.uml.alf.to.fuml;singleton:=true
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Automatic-Module-Name: org.eclipse.papyrus.uml.alf.to.fuml
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.classpath
index 1322f6dec67..1692b979957 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.classpath
@@ -1,6 +1,6 @@
 <?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-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins">
 		<accessrules>
 			<accessrule kind="accessible" pattern="org/apache/log4j/*"/>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/META-INF/MANIFEST.MF
index 26a7f06f2a0..225eb908ee3 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf.ui/META-INF/MANIFEST.MF
@@ -29,5 +29,5 @@ Bundle-Activator: org.eclipse.papyrus.uml.alf.ui.internal.AlfActivator
 Bundle-SymbolicName: org.eclipse.papyrus.uml.alf.ui;singleton:=true
 Import-Package: org.apache.log4j;version="[1.2.0,2.0.0)",
  org.eclipse.xtext.xbase.lib;version="[2.10.0,3.0.0)"
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Automatic-Module-Name: org.eclipse.papyrus.uml.alf.ui
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.classpath b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.classpath
index 3c38b4e531d..a54efa33cfa 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.classpath
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.classpath
@@ -1,6 +1,6 @@
 <?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-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src-gen"/>
 	<classpathentry kind="src" path="src"/>
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.settings/org.eclipse.jdt.core.prefs b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.settings/org.eclipse.jdt.core.prefs
index a8cc7ef70ef..037f04a07c2 100755
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.settings/org.eclipse.jdt.core.prefs
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/.settings/org.eclipse.jdt.core.prefs
@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=11
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -12,7 +12,7 @@ org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=11
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
diff --git a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/META-INF/MANIFEST.MF b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/META-INF/MANIFEST.MF
index 88aaa80ed23..7e0ea54e36e 100644
--- a/plugins/uml/alf/org.eclipse.papyrus.uml.alf/META-INF/MANIFEST.MF
+++ b/plugins/uml/alf/org.eclipse.papyrus.uml.alf/META-INF/MANIFEST.MF
@@ -14,7 +14,7 @@ Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: .
 Bundle-Name: %pluginName
 Bundle-Localization: plugin
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-11
 Require-Bundle: org.eclipse.emf.codegen.ecore.ui;bundle-version="[2.22.0,3.0.0)",
  org.eclipse.emf.mwe2.launch;bundle-version="[2.11.0,3.0.0)",
  org.eclipse.gmf.runtime.diagram.ui;bundle-version="[1.9.0,2.0.0)",