/*
 * ITable.h
 *
 *  Created on: Sep 19, 2012
 *      Author: Mitchell Wills
 */

#ifndef ITABLE_H_
#define ITABLE_H_

#include <memory>

#include "llvm/StringRef.h"
#include "nt_Value.h"

class ITableListener;

class ITable {
 public:
  /**
   * Determines whether the given key is in this table.
   *
   * @param key the key to search for
   * @return true if the table as a value assigned to the given key
   */
  virtual bool ContainsKey(llvm::StringRef key) const = 0;

  /**
   * Determines whether there exists a non-empty subtable for this key
   * in this table.
   *
   * @param key the key to search for
   * @return true if there is a subtable with the key which contains at least
   * one key/subtable of its own
   */
  virtual bool ContainsSubTable(llvm::StringRef key) const = 0;

  /**
   * Gets the subtable in this table for the given name.
   *
   * @param key the name of the table relative to this one
   * @return a sub table relative to this one
   */
  virtual std::shared_ptr<ITable> GetSubTable(llvm::StringRef key) const = 0;

  /**
   * Makes a key's value persistent through program restarts.
   *
   * @param key the key to make persistent
   */
  virtual void Persist(llvm::StringRef key) = 0;

  /**
   * Gets the value associated with a key as an object
   *
   * @param key the key of the value to look up
   * @return the value associated with the given key
   * @throws TableKeyNotDefinedException if there is no value associated with
   * the given key
   */
  virtual std::shared_ptr<nt::Value> GetValue(llvm::StringRef key) const = 0;

  /**
   * Put a value in the table
   *
   * @param key the key to be assigned to
   * @param value the value that will be assigned
   * @throws IllegalArgumentException when the value is not supported by the
   * table
   */
  virtual void PutValue(llvm::StringRef key,
                        std::shared_ptr<nt::Value> value) = 0;

  /**
   * Put a number in the table
   *
   * @param key the key to be assigned to
   * @param value the value that will be assigned
   */
  virtual void PutNumber(llvm::StringRef key, double value) = 0;

  /**
   * Gets the number associated with the given name.
   *
   * @param key the key to look up
   * @param defaultValue the value to be returned if no value is found
   * @return the value associated with the given key or the given default value
   * if there is no value associated with the key
   */
  virtual double GetNumber(llvm::StringRef key, double defaultValue) const = 0;

  /**
   * Put a string in the table
   *
   * @param key the key to be assigned to
   * @param value the value that will be assigned
   */
  virtual void PutString(llvm::StringRef key, llvm::StringRef value) = 0;

  /**
   * Gets the string associated with the given name.
   *
   * @param key the key to look up
   * @param defaultValue the value to be returned if no value is found
   * @return the value associated with the given key or the given default value
   * if there is no value associated with the key
   */
  virtual std::string GetString(llvm::StringRef key,
                                llvm::StringRef defaultValue) const = 0;

  /**
   * Put a boolean in the table
   *
   * @param key the key to be assigned to
   * @param value the value that will be assigned
   */
  virtual void PutBoolean(llvm::StringRef key, bool value) = 0;

  /**
   * Gets the boolean associated with the given name.
   *
   * @param key the key to look up
   * @param defaultValue the value to be returned if no value is found
   * @return the value associated with the given key or the given default value
   * if there is no value associated with the key
   */
  virtual bool GetBoolean(llvm::StringRef key, bool defaultValue) const = 0;

  /**
   * Add a listener for changes to the table
   *
   * @param listener the listener to add
   */
  virtual void AddTableListener(ITableListener* listener) = 0;

  /**
   * Add a listener for changes to the table
   *
   * @param listener the listener to add
   * @param immediateNotify if true then this listener will be notified of all
   * current entries (marked as new)
   */
  virtual void AddTableListener(ITableListener* listener,
                                bool immediateNotify) = 0;

  /**
   * Add a listener for changes to a specific key the table
   *
   * @param key the key to listen for
   * @param listener the listener to add
   * @param immediateNotify if true then this listener will be notified of all
   * current entries (marked as new)
   */
  virtual void AddTableListener(llvm::StringRef key, ITableListener* listener,
                                bool immediateNotify) = 0;

  /**
   * Remove a listener from receiving table events
   *
   * @param listener the listener to be removed
   */
  virtual void RemoveTableListener(ITableListener* listener) = 0;
};

#endif /* ITABLE_H_ */