OoasTools

/**

  *

  *                      OOAS Compiler

  *

  *       Copyright 2015, AIT Austrian Institute of Technology.

  * This code is based on the C# Version of the OOAS Compiler, which is

  * copyright 2015 by the Institute of Software Technology, Graz University

  * of Technology with portions copyright by the AIT Austrian Institute of

  * Technology. All rights reserved.

  *

  * SEE THE "LICENSE" FILE FOR THE TERMS UNDER WHICH THIS FILE IS PROVIDED.

  *

  * If you modify the file please update the list of contributors below to in-

  * clude your name. Please also stick to the coding convention of using TABs

  * to do the basic (block-level) indentation and spaces for anything after

  * that. (Enable the display of special chars and it should be pretty obvious

  * what this means.) Also, remove all trailing whitespace.

  *

  * Contributors:

  *               Willibald Krenn (AIT)

  *               Stephan Zimmerer (AIT)

  *               Markus Demetz (AIT)

  *               Christoph Czurda (AIT)

  *

  */

package org.momut.ooas.parser;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Map.Entry;

import org.momut.ooas.ast.identifiers.Identifier;

import org.momut.ooas.utils.OoasCompilerHashMap;

public class SymbolTable

{

        private OoasCompilerHashMap<String, Identifier> m_symbols;

        public List<Identifier> symbolList() { return new ArrayList<Identifier>(m_symbols.values());}

        public SymbolTable()

        {

                m_symbols = new OoasCompilerHashMap<String, Identifier>();

        }

        public SymbolTable(SymbolTable toCopy)

        {

                if (toCopy != null)

                        m_symbols = new OoasCompilerHashMap<String, Identifier>(toCopy.m_symbols);

                else

                        m_symbols = new OoasCompilerHashMap<String, Identifier>();

        }

        public boolean Defined(Identifier aValue)

        {

                return aValue == m_symbols.get(aValue.tokenText()); // ref comp!

        }

        public boolean Defined(String aKey)

        {

                return m_symbols.containsKey(aKey);

        }

        public Identifier Get(String aKey)

        {

                return m_symbols.get(aKey);

        }

        public void AddIdentifier(Identifier anIdent)

        {

                if (anIdent != null) {

                        final Identifier oldValue = m_symbols.put(anIdent.tokenText(), anIdent);

                        if (oldValue != null)

                                throw new UnsupportedOperationException(

                                        String.format("Identifier '%s' already exists", anIdent.tokenText()));

                }

        }

        public void AddSymbolTable(SymbolTable otherTable)

        {

                for (final Entry<String,Identifier> x: otherTable.m_symbols.entrySet())

                        if ( ! x.getKey().equals("self")) {

                                final Identifier oldValue = m_symbols.put(x.getKey(), x.getValue());

                                if (oldValue != null)

                                        throw new UnsupportedOperationException(

                                                String.format("Identifier '%s' already exists", x.getKey()));

                        }

        }

        public void Replace(String aKey, Identifier anIdent)

        {

                if (anIdent != null)

                {

                        m_symbols.remove(aKey);

                        m_symbols.put(anIdent.tokenText(), anIdent);

                }

        }

        public void SetSymbolList(List<Identifier> newList)

        {

                Collections.sort(newList);

                m_symbols = new OoasCompilerHashMap<String, Identifier>();

                for (final Identifier x : newList)

                        AddIdentifier(x);

        }

        public void Sort()

        {

                final List<Identifier> newList = new ArrayList<Identifier>(m_symbols.values());

                Collections.sort(newList);

                m_symbols = new OoasCompilerHashMap<String, Identifier>();

                for (final Identifier x : newList)

                        AddIdentifier(x);

        }

        public int size() {

                return m_symbols.size();

        }

}