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/*
    This file is part of Sarasvati.

    Sarasvati is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    Sarasvati is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with Sarasvati.  If not, see .

    Copyright 2009 Paul Lorenz
*/
package com.googlecode.sarasvati.impl;

import com.googlecode.sarasvati.env.Env;
import com.googlecode.sarasvati.env.TokenSetMemberEnv;

public class TokenSetMemberEnvAdapter implements Env
{
  private final TokenSetMemberEnv tokenSetEnv;
  private final int memberIndex;

  public TokenSetMemberEnvAdapter (final TokenSetMemberEnv tokenSetEnv,
                                   final int memberIndex)
  {
    this.tokenSetEnv = tokenSetEnv;
    this.memberIndex = memberIndex;
  }

  @Override
  public Iterable getAttributeNames ()
  {
    return tokenSetEnv.getAttributeNames( memberIndex );
  }

  @Override
  public String getAttribute (final String name)
  {
    return tokenSetEnv.getAttribute( memberIndex, name );
  }

  @Override
  public  T getAttribute (final String name,
                             final Class type)
  {
    return tokenSetEnv.getAttribute( memberIndex, name, type );
  }

  @Override
  public  T getAttribute (final String name,
                             final Class type,
                             final T defaultValue)
  {
    T result = tokenSetEnv.getAttribute( memberIndex, name, type );
    return result == null ? defaultValue : result;
  }

  @Override
  public void setAttribute (final String name,
                            final String value)
  {
    tokenSetEnv.setAttribute( memberIndex, name, value );
  }

  @Override
  public void setAttribute (final String name,
                            final Object value)
  {
    tokenSetEnv.setAttribute( memberIndex, name, value );
  }

  @Override
  public boolean hasAttribute (final String name)
  {
    return tokenSetEnv.hasAttribute( memberIndex, name );
  }

  @Override
  public void importEnv (final Env env)
  {
    for ( String name : env.getAttributeNames() )
    {
      setAttribute( name, env.getAttribute( name ) );
    }

    for ( String name : env.getTransientAttributeNames() )
    {
      setTransientAttribute( name, env.getTransientAttribute( name ) );
    }
  }

  @Override
  public void removeAttribute (final String name)
  {
    tokenSetEnv.removeAttribute( memberIndex, name );
  }

  @Override
  public Object getTransientAttribute (final String name)
  {
    return tokenSetEnv.getTransientAttribute( memberIndex, name );
  }

  @Override
  public Iterable getTransientAttributeNames ()
  {
    return tokenSetEnv.getTransientAttributeNames( memberIndex );
  }

  @Override
  public boolean hasTransientAttribute (final String name)
  {
    return tokenSetEnv.hasTransientAttribute( memberIndex, name );
  }

  @Override
  public void removeTransientAttribute (final String name)
  {
    tokenSetEnv.removeTransientAttribute( memberIndex, name );
  }

  @Override
  public void setTransientAttribute (final String name,
                                     final Object value)
  {
    tokenSetEnv.setTransientAttribute( memberIndex, name, value );
  }
}