Use java.templates.typeComment on code snippet for "class"

[carljo-reyes]

When expanding a code snippet for type (e.g. class), typeComment is not applied in the generated code. typeComment is only applied for types created by the LSP

Please make it such that java.templates.typeComment is also applied for type snippets provided by the LSP

[rgrunber]

Yup, definitely is happening and shouldn't. Not sure why it was never caught before. I think to solve it we need to modify

eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/preferences/CodeTemplatePreferences.java

Line 201 in e90ec8f

public static final String CODETEMPLATE_CLASSSNIPPET_PUBLIC = "${filecomment}${package_header}/**\n * ${type_name}\n */\npublic class ${type_name} {\n\n\t${cursor}\n}";

. Currently it's just set so that the type comment for class is just /**\n * ${type_name}\n */. We should probably add some new variable ${typeComment} and then when we use that "template", make sure to set it based on the what the client passes in settings at :

eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/contentassist/SnippetCompletionProposal.java

Lines 643 to 644 in e90ec8f

	String fileComment = cu.getTypes().length == 0 ? CodeGeneration.getFileComment(cu, lineDelimiter) : null;
	context.setVariable(CodeTemplateContextType.FILE_COMMENT, fileComment != null ? fileComment + lineDelimiter : "");

Basically do the same thing that happens for file comments.

We should also make sure that things that create new files through server-side resource operations populate the new file correctly.