Merge pull request #45 from sharwell/fix-32

Add the ability to explicitly specify the path to the Java executable

runtime/CSharp/Antlr4BuildTasks/Antlr4.v3.5.targets

@@ -138,6 +138,7 @@
       ToolPath="$(Antlr4ToolLocation)"
       JavaVendor="$(Antlr4JavaVendor)"
       JavaInstallation="$(Antlr4JavaInstallation)"
+      JavaExecutable="$(Antlr4JavaExecutable)"
       BuildTaskPath="$(Antlr4BuildTaskLocation)"
       OutputPath="$(IntermediateOutputPath)"
       TargetLanguage="%(Antlr4.TargetLanguage)"

runtime/CSharp/Antlr4BuildTasks/Antlr4.v4.0.targets

@@ -133,6 +133,7 @@
       ToolPath="$(Antlr4ToolLocation)"
       JavaVendor="$(Antlr4JavaVendor)"
       JavaInstallation="$(Antlr4JavaInstallation)"
+      JavaExecutable="$(Antlr4JavaExecutable)"
       BuildTaskPath="$(Antlr4BuildTaskLocation)"
       OutputPath="$(IntermediateOutputPath)"
       TargetLanguage="%(Antlr4.TargetLanguage)"

runtime/CSharp/Antlr4BuildTasks/Antlr4ClassGenerationTask.cs

@@ -163,6 +163,12 @@ namespace Antlr4.Build.Tasks
             set;
         }
 
+        public string JavaExecutable
+        {
+            get;
+            set;
+        }
+
         [Output]
         public ITaskItem[] GeneratedCodeFiles
         {
@@ -332,6 +338,7 @@ namespace Antlr4.Build.Tasks
             wrapper.AbstractGrammar = AbstractGrammar;
             wrapper.JavaVendor = JavaVendor;
             wrapper.JavaInstallation = JavaInstallation;
+            wrapper.JavaExecutable = JavaExecutable;
             return wrapper;
         }
 

runtime/CSharp/Antlr4BuildTasks/Antlr4ClassGenerationTaskInternal.cs

@@ -130,6 +130,12 @@ namespace Antlr4.Build.Tasks
             set;
         }
 
+        public string JavaExecutable
+        {
+            get;
+            set;
+        }
+
         public IList<string> SourceCodeFiles
         {
             get
@@ -239,8 +245,16 @@ namespace Antlr4.Build.Tasks
         {
             try
             {
-                string javaHome = JavaHome;
+                string java;
-                string java = Path.Combine(Path.Combine(javaHome, "bin"), "java.exe");
+                if (!string.IsNullOrEmpty(JavaExecutable))
+                {
+                    java = JavaExecutable;
+                }
+                else
+                {
+                    string javaHome = JavaHome;
+                    java = Path.Combine(Path.Combine(javaHome, "bin"), "java.exe");
+                }
 
                 List<string> arguments = new List<string>();
                 arguments.Add("-cp");