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package com.sun.source.util;

import com.sun.source.doctree.DocCommentTree;
import com.sun.source.doctree.DocTree;
import com.sun.source.tree.CompilationUnitTree;

/**
 * Provides methods to obtain the position of a DocTree within a javadoc comment.
 * A position is defined as a simple character offset from the start of a
 * CompilationUnit where the first character is at offset 0.
 *
 * @since 1.8
 */
public interface DocSourcePositions extends SourcePositions {

    /**
     * Returns the starting position of the tree within the comment within the file.  If tree is not found within
     * file, or if the starting position is not available,
     * returns {@link javax.tools.Diagnostic#NOPOS}.
     * The given tree should be under the given comment tree, and the given documentation
     * comment tree should be returned from a {@link DocTrees#getDocCommentTree(com.sun.source.util.TreePath) }
     * for a tree under the given file.
     * The returned position must be at the start of the yield of this tree, that
     * is for any sub-tree of this tree, the following must hold:
     *
     * 

* {@code tree.getStartPosition() <= subtree.getStartPosition()} or
* {@code tree.getStartPosition() == NOPOS} or
* {@code subtree.getStartPosition() == NOPOS} *

* * @param file compilation unit in which to find tree * @param comment the comment tree that encloses the tree for which the * position is being sought * @param tree tree for which a position is sought * @return the start position of tree */ long getStartPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree); /** * Returns the ending position of the tree within the comment within the file. If tree is not found within * file, or if the ending position is not available, * returns {@link javax.tools.Diagnostic#NOPOS}. * The given tree should be under the given comment tree, and the given documentation * comment tree should be returned from a {@link DocTrees#getDocCommentTree(com.sun.source.util.TreePath) } * for a tree under the given file. * The returned position must be at the end of the yield of this tree, * that is for any sub-tree of this tree, the following must hold: * *

* {@code tree.getEndPosition() >= subtree.getEndPosition()} or
* {@code tree.getEndPosition() == NOPOS} or
* {@code subtree.getEndPosition() == NOPOS} *

* * In addition, the following must hold: * *

* {@code tree.getStartPosition() <= tree.getEndPosition()} or
* {@code tree.getStartPosition() == NOPOS} or
* {@code tree.getEndPosition() == NOPOS} *

* * @param file compilation unit in which to find tree * @param comment the comment tree that encloses the tree for which the * position is being sought * @param tree tree for which a position is sought * @return the end position of tree */ long getEndPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree); }




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