1 files changed, 40 insertions, 1 deletions

diff --git a/src/utils/lombok/eclipse/Eclipse.java b/src/utils/lombok/eclipse/Eclipse.java
index edfe1536..c2a863d5 100644
--- a/src/utils/lombok/eclipse/Eclipse.java
+++ b/src/utils/lombok/eclipse/Eclipse.java
@@ -37,8 +37,10 @@ import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.Literal;
 import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
 import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
+import org.eclipse.jdt.internal.compiler.ast.TryStatement;
 import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.TypeReference;
+import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
 import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
 import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
 
@@ -180,8 +182,31 @@ public class Eclipse {
 		return null;
 	}
 	
-	private static int ecjCompilerVersionCached = -1;
+	private static long latestEcjCompilerVersionConstantCached = 0;
+	
+	public static long getLatestEcjCompilerVersionConstant() {
+		if (latestEcjCompilerVersionConstantCached != 0) return latestEcjCompilerVersionConstantCached;
+		
+		int highestVersionSoFar = 0;
+		for (Field f : ClassFileConstants.class.getDeclaredFields()) {
+			try {
+				if (f.getName().startsWith("JDK1_")) {
+					int thisVersion = Integer.parseInt(f.getName().substring("JDK1_".length()));
+					if (thisVersion > highestVersionSoFar) {
+						highestVersionSoFar = thisVersion;
+						latestEcjCompilerVersionConstantCached = (Long) f.get(null);
+					}
+				}
+			} catch (Exception ignore) {}
+		}
+		
+		if (highestVersionSoFar > 6 && !ecjSupportsJava7Features()) {
+			latestEcjCompilerVersionConstantCached = ClassFileConstants.JDK1_6;
+		}
+		return latestEcjCompilerVersionConstantCached;
+	}
 	
+	private static int ecjCompilerVersionCached = -1;
 	public static int getEcjCompilerVersion() {
 		if (ecjCompilerVersionCached >= 0) return ecjCompilerVersionCached;
 		
@@ -194,6 +219,20 @@ public class Eclipse {
 		}
 		
 		if (ecjCompilerVersionCached < 5) ecjCompilerVersionCached = 5;
+		if (!ecjSupportsJava7Features()) ecjCompilerVersionCached = Math.min(6, ecjCompilerVersionCached);
 		return ecjCompilerVersionCached;
 	}
+	
+	/**
+	 * Certain ECJ versions that only go up to -source 6 report that they support -source 7 and even fail to error when -source 7 is applied.
+	 * We detect this and correctly say that no more than -source 6 is supported. (when this is the case, this method returns false).
+	 */
+	private static boolean ecjSupportsJava7Features() {
+		try {
+			TryStatement.class.getDeclaredField("resources");
+			return true;
+		} catch (NoSuchFieldException e) {
+			return false;
+		}
+	}
 }