abstract class ContainerBase extends @container {

abstract string getAbsolutePath();

ContainerBase getParentContainer() { containerparent(result, this) }

string toString() { result = this.getAbsolutePath() }

}

class FolderBase extends ContainerBase, @folder {

override string getAbsolutePath() { folders(this, result) }

}

class FileBase extends ContainerBase, @file {

override string getAbsolutePath() { files(this, result) }

}

predicate hasSourceLocationPrefix = sourceLocationPrefix/1;

/** Gets a token in this file. */

private QL::Token getAToken() { result.getLocation().getFile() = this }

/** Holds if `line` contains a token. */

private predicate line(int line, boolean comment) {

exists(QL::Token token, Location l |

token = this.getAToken() and

l = token.getLocation() and

line in [l.getStartLine() .. l.getEndLine()] and

if token instanceof @ql_token_block_comment or token instanceof @ql_token_line_comment

then comment = true

else comment = false

)

}

/** Gets the number of lines in this file. */

int getNumberOfLines() { result = max([0, this.getAToken().getLocation().getEndLine()]) }

/** Gets the number of lines of code in this file. */

int getNumberOfLinesOfCode() { result = count(int line | this.line(line, false)) }

/** Gets the number of lines of comments in this file. */

int getNumberOfLinesOfComments() { result = count(int line | this.line(line, true)) }

/** Holds if this file was extracted from ordinary source code. */

predicate fromSource() { any() }