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Enum typemaps taken out of java.swg

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New typemap files for the different C/C++ to Java enum wrapping approaches.


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@5921 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
William S Fulton 2004-05-24 20:09:17 +00:00
commit 990156dff1
5 changed files with 234 additions and 19 deletions
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76
Lib/java/enums.swg Normal file
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/* -----------------------------------------------------------------------------
* Include this file in order for C/C++ enums to be wrapped by proper Java enums.
* Note that the JNI layer handles the enum as an int. The Java enum has extra
* code generated to store the C++ int value. This is required for C++ enums that
* specify a value for the enum item, as native Java enums do not support this.
* ----------------------------------------------------------------------------- */
%typemap(jni) enum SWIGTYPE "jint"
%typemap(jtype) enum SWIGTYPE "int"
%typemap(jstype) enum SWIGTYPE "$javaclassname"
%typemap(in) enum SWIGTYPE %{ $1 = ($1_ltype)$input; %}
%typemap(out) enum SWIGTYPE %{ $result = (jint)$1; %}
%typemap(directorin, descriptor="I") enum SWIGTYPE "$input = (jint) $1;"
%typemap(javadirectorin) enum SWIGTYPE "$jniinput"
%typemap(javadirectorout) enum SWIGTYPE "$javacall"
%typecheck(SWIG_TYPECHECK_INT32) enum SWIGTYPE ""
%typemap(javain) enum SWIGTYPE "$javainput.swigValue()"
%typemap(javaout) enum SWIGTYPE {
return $javaclassname.swigToEnum($jnicall);
}
%typemap(throws) enum SWIGTYPE {
SWIG_JavaThrowException(jenv, SWIG_JavaRuntimeException, "C++ $1_type exception thrown");
}
%typemap(javain) enum SWIGTYPE "$javainput.swigValue()"
%typemap(javaout) enum SWIGTYPE {
return $javaclassname.swigToEnum($jnicall);
}
%typemap(javaclassmodifiers) enum SWIGTYPE "public enum"
/*
* SwigNext static inner class used instead of a static int as static fields cannot be accessed from enum initialisers.
* The swigToEnum method is used to find the Java enum from a C++ enum integer value. The default one here takes
* advantage of the fact that most enums do not have initial values specified, so the lookup is fast. If initial
* values are specified then a lengthy linear search through all possible enums might occur. Specific typemaps could be
* written to possibly optimise this lookup by taking advantage of characteristics peculiar to the targeted enum.
*/
%typemap(javagetcptr) enum SWIGTYPE %{
public final int swigValue() {
return swigValue;
}
public static $javaclassname swigToEnum(int swigValue) {
$javaclassname[] swigValues = $javaclassname.class.getEnumConstants();
if (swigValue < swigValues.length && swigValues[swigValue].swigValue == swigValue)
return swigValues[swigValue];
for ($javaclassname swigEnum : swigValues)
if (swigEnum.swigValue == swigValue)
return swigEnum;
throw new IllegalArgumentException("No enum " + $javaclassname.class + " with value " + swigValue);
}
private $javaclassname() {
this.swigValue = SwigNext.next++;
}
private $javaclassname(int swigValue) {
this.swigValue = swigValue;
SwigNext.next = swigValue+1;
}
private final int swigValue;
private static class SwigNext {
private static int next = 0;
}
%}
%javaenum(proper);