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;

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();

	}

}