import org.eclipse.core.runtime.content.IContentDescriber; //导入依赖的package包/类
@Override
public int describe(InputStream contents, IContentDescription description) throws IOException {
    
    try {
        GradleScriptASTParser parser = new GradleScriptASTParser(contents);
        PluginsSyntaxDescriberVisitor pluginsVisitor = new PluginsSyntaxDescriberVisitor();
        ApplySyntaxDescriberVisitor visitor = new ApplySyntaxDescriberVisitor();
        
        parser.walkScript(pluginsVisitor);
        
        if (pluginsVisitor.isFoundPlugin()) {
        	return IContentDescriber.VALID;
        }
        
        parser.walkScript(visitor);
        
        if (visitor.isFoundplugin()) {
            return IContentDescriber.VALID;
        }
        
    } catch (MultipleCompilationErrorsException ex) {
        return IContentDescriber.INDETERMINATE;
    }
    return IContentDescriber.INVALID;
}
 

import org.eclipse.core.runtime.content.IContentDescriber; //导入依赖的package包/类
public int describe(InputStream contents, IContentDescription description)
		throws IOException {
	int result = IContentDescriber.INDETERMINATE;

	if (description == null) {
		result = computeValidity(contents);
	} else {
		calculateSupportedOptions(contents, description);
		result = computeValidity(contents);
	}
	return result;
}
 

import org.eclipse.core.runtime.content.IContentDescriber; //导入依赖的package包/类
private int computeValidity(InputStream inputStream) {
	// currently no specific check for validilty
	// based on contents.
	return IContentDescriber.INDETERMINATE;
}