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Anchor.h

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// Anchor.h: An anchor is a named offset into signal data
// Author: Xiaoyi Ma, Steven Bird
// Copyright (C) 2001 Linguistic Data Consortium, U Penn.
// Web: http://www.ldc.upenn.edu/; Email: ldc@ldc.upenn.edu
// For license information, see the file `LICENSE' included
// with the distribution.


#ifndef Anchor_h
#define Anchor_h

#include "AGTypes.h"
#include "Signal.h"


using namespace std;

class Anchor {
  friend class AG;
  friend class AnnotationIndex;

 private:
  const Id id;

  Offset offset;

  Unit unit;

  string signals;

  bool anchored;

 protected:

  void unsetOffset() { anchored = false; }

 public:
  Anchor(Id id, Offset offset, Unit unit, string signals);

  Anchor(Id id, Unit unit, string signals);

  Anchor(Id id, const Anchor*);

  const Id getId() const {return id;}

  Offset getOffset() const { return offset; }

  void setOffset(Offset o) {offset = o; anchored = true;}

  bool getAnchored() const { return anchored; }

  void setSignals(string signals) { this->signals = signals; }

  string getSignals() const { return signals; }

  void setUnit(string unit) { this->unit = unit; }
  
  Unit getUnit() const { return unit; }

  string toString();
  friend bool operator < (const Anchor&, const Anchor&);
};

class AnchorCompFunc {
 public:
  bool operator() (const Anchor* a1, const Anchor* a2) const {
    return *a1 < *a2;
  }
};

typedef set<Anchor*,AnchorCompFunc> AnchorSeq;
typedef set<Anchor*> AnchorSet;

#endif

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