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我正在研究用java编写的注释处理器。我正在使用JavaPoet生成一些代码行。我必须生成一个'switch'语句。现在,我使用下面的代码:使用JavaPoet生成switch语句
MethodSpec.Builder methodBuilder = MethodSpec.methodBuilder("parseOnXml")
.addAnnotation(Override.class)
.addModifiers(Modifier.PUBLIC)
.addParameter(typeName(XmlBinderContext.class), "context")
.addParameter(typeName(XmlWrapperParser.class), "wrapper")
.addParameter(typeName(Integer.TYPE), "currentEventType")
.addJavadoc("create new object instance\n")
.returns(typeName(item.getElement()));
...
methodBuilder.beginControlFlow("switch(eventType)");
methodBuilder.addCode("case $T.START_ELEMENT:\n", XMLEvent.class);
methodBuilder.addStatement("break");
methodBuilder.addCode("case $T.END_ELEMENT:\n", XMLEvent.class);
methodBuilder.addStatement("break");
methodBuilder.addCode("case $T.CDATA:\n", XMLEvent.class);
methodBuilder.addCode("case $T.CHARACTERS:\n", XMLEvent.class);
methodBuilder.addStatement("break");
methodBuilder.addCode("default:\n");
methodBuilder.addStatement("break");
methodBuilder.endControlFlow();
生成以下代码:
switch(eventType) {
case XMLEvent.START_ELEMENT:
break;
case XMLEvent.END_ELEMENT:
break;
case XMLEvent.CDATA:
case XMLEvent.CHARACTERS:
break;
default:
break;
}
是它生成一个switch语句与javapoet唯一的办法还是有更好的方法(使用beginControlFlow )生成相同的代码?