1 files changed, 62 insertions, 0 deletions
diff --git a/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/JavaSettingsUtils.java b/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/JavaSettingsUtils.java
new file mode 100644
index 00000000..108df08e
--- /dev/null
+++ b/org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/internal/JavaSettingsUtils.java
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * Copyright (c) 2019 Red Hat, Inc.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *      Red Hat, Inc. - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.m2e.jdt.internal;
+
+import org.eclipse.jdt.core.JavaCore;
+
+
+/**
+ * Utility class related to Java project settings
+ *
+ * @author Fred Bricon
+ */
+public class JavaSettingsUtils {
+
+  /**
+   * @deprecated use JavaCore.COMPILER_PB_ENABLE_PREVIEW_FEATURES when it's available
+   */
+  @Deprecated
+  public static final String COMPILER_PB_ENABLE_PREVIEW_FEATURES = "org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures";
+
+  /**
+   * @deprecated use JavaCore.COMPILER_PB_REPORT_PREVIEW_FEATURES when it's available
+   */
+  @Deprecated
+  public static final String COMPILER_PB_REPORT_PREVIEW_FEATURES = "org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures";
+
+  public static final String ENABLE_PREVIEW_JVM_FLAG = "--enable-preview";
+
+  public static final String PARAMETERS_JVM_FLAG = "-parameters";
+
+  /**
+   * Does this version of JDT support JavaCore.COMPILER_PB_ENABLE_PREVIEW_FEATURES? Will be removed once the minimum JDT
+   * requirement guarantees COMPILER_PB_ENABLE_PREVIEW_FEATURES is available.
+   */
+  @Deprecated
+  public static final boolean isPreviewFeatureAvailable;
+
+  static {
+    //TODO remove that once we depend on Eclipse 4.12
+    boolean hasField = false;
+    try {
+      JavaCore.class.getField("COMPILER_PB_ENABLE_PREVIEW_FEATURES");
+      hasField = true;
+    } catch(Exception ignore) {
+    }
+    isPreviewFeatureAvailable = hasField;
+  }
+
+  private JavaSettingsUtils() {
+    //No public instanciation
+  }
+
+}