[Java] Check for types referenced in the header when generating the IR.

Author: mjpt777

sbe-tool/src/main/java/uk/co/real_logic/sbe/ir/Ir.java

@@ -73,6 +73,8 @@ public Ir(
  this.byteOrder = byteOrder;
  this.headerStructure = new HeaderStructure(new ArrayList<>(headerTokens));
 
+ captureTypes(headerTokens, 0, headerTokens.size() - 1);
+
  if (Boolean.getBoolean(SbeTool.CPP_NAMESPACES_COLLAPSE))
  {
  this.namespaces = new String[]{ (namespaceName == null ? packageName : namespaceName).replace(".", "_") };

sbe-tool/src/test/java/uk/co/real_logic/sbe/generation/java/JavaGeneratorTest.java

@@ -81,6 +81,7 @@ public void shouldGenerateMessageHeaderStub() throws Exception
  when(mockBuffer.getShort(bufferOffset + templateIdOffset, BYTE_ORDER)).thenReturn(templateId);
 
  final JavaGenerator generator = generator();
+ generator.generateTypeStubs();
  generator.generateMessageHeaderStub();
 
  final Class<?> clazz = compile(fqClassName);
@@ -106,6 +107,7 @@ public void shouldGenerateMessageHeaderDecoderStub() throws Exception
  when(mockBuffer.getShort(bufferOffset + templateIdOffset, BYTE_ORDER)).thenReturn(templateId);
 
  final JavaGenerator generator = generator();
+ generator.generateTypeStubs();
  generator.generateMessageHeaderStub();
 
  final Class<?> clazz = compile(fqClassName);