import com.google.soap.search.GoogleSearch;
import com.google.soap.search.GoogleSearchResult;
import com.google.soap.search.GoogleSearchFault;

public class DemoGoogleAgent implements GoogleAgent
{
    private GoogleSearch delegate;
    private String       errorMessage;

    public DemoGoogleAgent( String googleKey )
    {
	delegate = new GoogleSearch();
	delegate.setKey( googleKey );

        errorMessage = "None.";
    }

    public GoogleSearchResult search( String keywords )
    {
        GoogleSearchResult result = null;

        try {
            delegate.setQueryString( keywords );
            result = delegate.doSearch();
        }
        catch (GoogleSearchFault f) {
            errorMessage = "*** The search for [" + keywords    +
                           "] failed.\n"          + f.toString();
	}

        return result;
    }

    public String errorMessage()
    {
        String answer = errorMessage;
        errorMessage  = "None.";
        return answer;
    }

    public String getCachedPage( String url )
    {
        String result = null;

        try {
            byte[] resultAsByteArray = delegate.doGetCachedPage( url );
            result = new String( resultAsByteArray );
        }
        catch (GoogleSearchFault f) {
            result = "*** The attempt to retrieve <" + url +
                     "> failed.\n"                   + f.toString();
	}

        return result;
    }

    public String suggestSpelling( String sourceString )
    {
        String result = null;

        try {
            result = delegate.doSpellingSuggestion( sourceString );
        }
        catch (GoogleSearchFault f) {
            result = "*** The attempt to spell-check [" + sourceString +
                     "] failed.\n"                      + f.toString();
	}

        return result;
    }

    public void setSearchSize( int desiredSize )
    {
        delegate.setMaxResults( desiredSize );
    }
    
    public void setStartResult( int firstIndex )
    {
        delegate.setStartResult( firstIndex );
    }
}