[GROOVY-4825] Compiler Errors for @Immutable

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.8, 1.7.10, 1.8.0
• Fix Version/s: 1.8.1
• Environment: Mac OS X
• Assignee: Paul King
• Reporter: Peter Rietzler
• Created: 16/May/11 04:02
• Updated: 04/Aug/11 15:51
• Resolved: 04/Aug/11 15:51

Description

@Immutable
class X {
  int a	
}

Leads to (groovy 1.7.10, executed using gradle)

java.lang.RuntimeException: Explicit constructors not allowed for @Immutable class: X
	at org.codehaus.groovy.transform.ImmutableASTTransformation.createConstructor(ImmutableASTTransformation.java:308)
	at org.codehaus.groovy.transform.ImmutableASTTransformation.visit(ImmutableASTTransformation.java:117)
	at org.codehaus.groovy.transform.ASTTransformationVisitor.visitClass(ASTTransformationVisitor.java:129)
	at org.codehaus.groovy.transform.ASTTransformationVisitor$2.call(ASTTransformationVisitor.java:172)
	at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:942)
	at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:519)
	at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:497)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:474)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:453)
	at org.codehaus.groovy.tools.FileSystemCompiler.compile(FileSystemCompiler.java:67)
	at org.codehaus.groovy.tools.FileSystemCompiler.doCompilation(FileSystemCompiler.java:180)
	at org.codehaus.groovy.tools.FileSystemCompiler.commandLineCompile(FileSystemCompiler.java:148)
	at org.codehaus.groovy.tools.FileSystemCompiler.main(FileSystemCompiler.java:162)

@Immutable
class X {
}

Leads to (groovy 1.7.8.xx-20110426-1500-e36, eclipse)

Duplicate method X() in type X

class Y {
  X x
}

Leads to (groovy 1.7.8.xx-20110426-1500-e36, eclipse)

General error during canonicalization: @Immutable processor doesn't know how to handle field 'x' of type 'playground.X' while compiling class playground.Y.
@Immutable classes currently only support properties with known immutable types or types where special handling achieves immutable behavior, including:
- Strings, primitive types, wrapper types, BigInteger and BigDecimal, enums
- other @Immutable classes and known immutables (java.awt.Color, java.net.URI)
- Cloneable classes, collections, maps and arrays, and other classes with special handling (java.util.Date)
Other restrictions apply, please see the groovydoc for @Immutable for further details