类 BaseTreeAdaptor

  • 所有已实现的接口:
    TreeAdaptor
    直接已知子类:
    CommonTreeAdaptor

    public abstract class BaseTreeAdaptor
    extends java.lang.Object
    implements TreeAdaptor
    A TreeAdaptor that works with any Tree implementation.
    • 字段概要

      字段 
      修饰符和类型 字段 说明
      protected java.util.Map<java.lang.Object,​java.lang.Integer> treeToUniqueIDMap
      System.identityHashCode() is not always unique; we have to track ourselves.
      protected int uniqueNodeID  
    • 方法概要

      所有方法 实例方法 抽象方法 具体方法 
      修饰符和类型 方法 说明
      void addChild​(java.lang.Object t, java.lang.Object child)
      Add a child to the tree t.
      java.lang.Object becomeRoot​(java.lang.Object newRoot, java.lang.Object oldRoot)
      If oldRoot is a nil root, just copy or move the children to newRoot.
      java.lang.Object becomeRoot​(Token newRoot, java.lang.Object oldRoot)
      Create a node for newRoot make it the root of oldRoot.
      java.lang.Object create​(int tokenType, java.lang.String text)
      Create a new node derived from a token, with a new token type.
      java.lang.Object create​(int tokenType, Token fromToken)
      Create a new node derived from a token, with a new token type.
      java.lang.Object create​(int tokenType, Token fromToken, java.lang.String text)
      Same as create(tokenType,fromToken) except set the text too.
      abstract Token createToken​(int tokenType, java.lang.String text)
      Tell me how to create a token for use with imaginary token nodes.
      abstract Token createToken​(Token fromToken)
      Tell me how to create a token for use with imaginary token nodes.
      java.lang.Object deleteChild​(java.lang.Object t, int i)
      Remove ith child and shift children down from right.
      java.lang.Object dupTree​(java.lang.Object tree)
      Duplicate tree recursively, using dupNode() for each node
      java.lang.Object dupTree​(java.lang.Object t, java.lang.Object parent)
      This is generic in the sense that it will work with any kind of tree (not just Tree interface).
      java.lang.Object errorNode​(TokenStream input, Token start, Token stop, RecognitionException e)
      create tree node that holds the start and stop tokens associated with an error.
      java.lang.Object getChild​(java.lang.Object t, int i)
      Get a child 0..n-1 node
      int getChildCount​(java.lang.Object t)
      How many children? If 0, then this is a leaf node
      java.lang.String getText​(java.lang.Object t)  
      int getType​(java.lang.Object t)
      For tree parsing, I need to know the token type of a node
      int getUniqueID​(java.lang.Object node)
      For identifying trees.
      boolean isNil​(java.lang.Object tree)
      Is tree considered a nil node used to make lists of child nodes?
      java.lang.Object nil()
      Return a nil node (an empty but non-null node) that can hold a list of element as the children.
      java.lang.Object rulePostProcessing​(java.lang.Object root)
      Transform ^(nil x) to x and nil to null
      void setChild​(java.lang.Object t, int i, java.lang.Object child)
      Set ith child (0..n-1) to t; t must be non-null and non-nil node
      void setText​(java.lang.Object t, java.lang.String text)
      Node constructors can set the text of a node
      void setType​(java.lang.Object t, int type)
      Node constructors can set the type of a node
      • 从类继承的方法 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • 字段详细资料

      • treeToUniqueIDMap

        protected java.util.Map<java.lang.Object,​java.lang.Integer> treeToUniqueIDMap
        System.identityHashCode() is not always unique; we have to track ourselves. That's ok, it's only for debugging, though it's expensive: we have to create a hashtable with all tree nodes in it.
      • uniqueNodeID

        protected int uniqueNodeID
    • 构造器详细资料

      • BaseTreeAdaptor

        public BaseTreeAdaptor()
    • 方法详细资料

      • nil

        public java.lang.Object nil()
        从接口复制的说明: TreeAdaptor
        Return a nil node (an empty but non-null node) that can hold a list of element as the children. If you want a flat tree (a list) use "t=adaptor.nil(); t.addChild(x); t.addChild(y);"
        指定者:
        nil 在接口中 TreeAdaptor
      • errorNode

        public java.lang.Object errorNode​(TokenStream input,
                                          Token start,
                                          Token stop,
                                          RecognitionException e)
        create tree node that holds the start and stop tokens associated with an error. If you specify your own kind of tree nodes, you will likely have to override this method. CommonTree returns Token.INVALID_TOKEN_TYPE if no token payload but you might have to set token type for diff node type. You don't have to subclass CommonErrorNode; you will likely need to subclass your own tree node class to avoid class cast exception.
        指定者:
        errorNode 在接口中 TreeAdaptor
      • isNil

        public boolean isNil​(java.lang.Object tree)
        从接口复制的说明: TreeAdaptor
        Is tree considered a nil node used to make lists of child nodes?
        指定者:
        isNil 在接口中 TreeAdaptor
      • dupTree

        public java.lang.Object dupTree​(java.lang.Object tree)
        从接口复制的说明: TreeAdaptor
        Duplicate tree recursively, using dupNode() for each node
        指定者:
        dupTree 在接口中 TreeAdaptor
      • dupTree

        public java.lang.Object dupTree​(java.lang.Object t,
                                        java.lang.Object parent)
        This is generic in the sense that it will work with any kind of tree (not just Tree interface). It invokes the adaptor routines not the tree node routines to do the construction.
      • addChild

        public void addChild​(java.lang.Object t,
                             java.lang.Object child)
        Add a child to the tree t. If child is a flat tree (a list), make all in list children of t. Warning: if t has no children, but child does and child isNil then you can decide it is ok to move children to t via t.children = child.children; i.e., without copying the array. Just make sure that this is consistent with have the user will build ASTs.
        指定者:
        addChild 在接口中 TreeAdaptor
      • becomeRoot

        public java.lang.Object becomeRoot​(java.lang.Object newRoot,
                                           java.lang.Object oldRoot)
        If oldRoot is a nil root, just copy or move the children to newRoot. If not a nil root, make oldRoot a child of newRoot. old=^(nil a b c), new=r yields ^(r a b c) old=^(a b c), new=r yields ^(r ^(a b c)) If newRoot is a nil-rooted single child tree, use the single child as the new root node. old=^(nil a b c), new=^(nil r) yields ^(r a b c) old=^(a b c), new=^(nil r) yields ^(r ^(a b c)) If oldRoot was null, it's ok, just return newRoot (even if isNil). old=null, new=r yields r old=null, new=^(nil r) yields ^(nil r) Return newRoot. Throw an exception if newRoot is not a simple node or nil root with a single child node--it must be a root node. If newRoot is ^(nil x) return x as newRoot. Be advised that it's ok for newRoot to point at oldRoot's children; i.e., you don't have to copy the list. We are constructing these nodes so we should have this control for efficiency.
        指定者:
        becomeRoot 在接口中 TreeAdaptor
      • rulePostProcessing

        public java.lang.Object rulePostProcessing​(java.lang.Object root)
        Transform ^(nil x) to x and nil to null
        指定者:
        rulePostProcessing 在接口中 TreeAdaptor
      • becomeRoot

        public java.lang.Object becomeRoot​(Token newRoot,
                                           java.lang.Object oldRoot)
        从接口复制的说明: TreeAdaptor
        Create a node for newRoot make it the root of oldRoot. If oldRoot is a nil root, just copy or move the children to newRoot. If not a nil root, make oldRoot a child of newRoot. Return node created for newRoot. Be advised: when debugging ASTs, the DebugTreeAdaptor manually calls create(Token child) and then plain becomeRoot(node, node) because it needs to trap calls to create, but it can't since it delegates to not inherits from the TreeAdaptor.
        指定者:
        becomeRoot 在接口中 TreeAdaptor
      • create

        public java.lang.Object create​(int tokenType,
                                       Token fromToken)
        从接口复制的说明: TreeAdaptor
        Create a new node derived from a token, with a new token type. This is invoked from an imaginary node ref on right side of a rewrite rule as IMAG[$tokenLabel]. This should invoke createToken(Token).
        指定者:
        create 在接口中 TreeAdaptor
      • create

        public java.lang.Object create​(int tokenType,
                                       Token fromToken,
                                       java.lang.String text)
        从接口复制的说明: TreeAdaptor
        Same as create(tokenType,fromToken) except set the text too. This is invoked from an imaginary node ref on right side of a rewrite rule as IMAG[$tokenLabel, "IMAG"]. This should invoke createToken(Token).
        指定者:
        create 在接口中 TreeAdaptor
      • create

        public java.lang.Object create​(int tokenType,
                                       java.lang.String text)
        从接口复制的说明: TreeAdaptor
        Create a new node derived from a token, with a new token type. This is invoked from an imaginary node ref on right side of a rewrite rule as IMAG["IMAG"]. This should invoke createToken(int,String).
        指定者:
        create 在接口中 TreeAdaptor
      • getType

        public int getType​(java.lang.Object t)
        从接口复制的说明: TreeAdaptor
        For tree parsing, I need to know the token type of a node
        指定者:
        getType 在接口中 TreeAdaptor
      • setType

        public void setType​(java.lang.Object t,
                            int type)
        从接口复制的说明: TreeAdaptor
        Node constructors can set the type of a node
        指定者:
        setType 在接口中 TreeAdaptor
      • getText

        public java.lang.String getText​(java.lang.Object t)
        指定者:
        getText 在接口中 TreeAdaptor
      • setText

        public void setText​(java.lang.Object t,
                            java.lang.String text)
        从接口复制的说明: TreeAdaptor
        Node constructors can set the text of a node
        指定者:
        setText 在接口中 TreeAdaptor
      • getChild

        public java.lang.Object getChild​(java.lang.Object t,
                                         int i)
        从接口复制的说明: TreeAdaptor
        Get a child 0..n-1 node
        指定者:
        getChild 在接口中 TreeAdaptor
      • setChild

        public void setChild​(java.lang.Object t,
                             int i,
                             java.lang.Object child)
        从接口复制的说明: TreeAdaptor
        Set ith child (0..n-1) to t; t must be non-null and non-nil node
        指定者:
        setChild 在接口中 TreeAdaptor
      • deleteChild

        public java.lang.Object deleteChild​(java.lang.Object t,
                                            int i)
        从接口复制的说明: TreeAdaptor
        Remove ith child and shift children down from right.
        指定者:
        deleteChild 在接口中 TreeAdaptor
      • getChildCount

        public int getChildCount​(java.lang.Object t)
        从接口复制的说明: TreeAdaptor
        How many children? If 0, then this is a leaf node
        指定者:
        getChildCount 在接口中 TreeAdaptor
      • getUniqueID

        public int getUniqueID​(java.lang.Object node)
        从接口复制的说明: TreeAdaptor
        For identifying trees. How to identify nodes so we can say "add node to a prior node"? Even becomeRoot is an issue. Use System.identityHashCode(node) usually.
        指定者:
        getUniqueID 在接口中 TreeAdaptor
      • createToken

        public abstract Token createToken​(int tokenType,
                                          java.lang.String text)
        Tell me how to create a token for use with imaginary token nodes. For example, there is probably no input symbol associated with imaginary token DECL, but you need to create it as a payload or whatever for the DECL node as in ^(DECL type ID). If you care what the token payload objects' type is, you should override this method and any other createToken variant.
      • createToken

        public abstract Token createToken​(Token fromToken)
        Tell me how to create a token for use with imaginary token nodes. For example, there is probably no input symbol associated with imaginary token DECL, but you need to create it as a payload or whatever for the DECL node as in ^(DECL type ID). This is a variant of createToken where the new token is derived from an actual real input token. Typically this is for converting '{' tokens to BLOCK etc... You'll see r : lc='{' ID+ '}' -> ^(BLOCK[$lc] ID+) ; If you care what the token payload objects' type is, you should override this method and any other createToken variant.