/* $Id: Extern.java 742162 2009-02-08 20:54:34Z dixson $
*
* Copyright 2007-2008 Cisco Systems Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package etch.compiler.opt;
import etch.compiler.EtchGrammarConstants;
import etch.compiler.ParseException;
import etch.compiler.Token;
import etch.compiler.ast.Name;
import etch.compiler.ast.Opt;
/**
* Option which sets the language specific attributes of an extern
* declaration.
*/
public class Extern extends Opt
{
/**
* Constructs the Extern.
*
* @param name
* @param args
* @throws ParseException
*/
public Extern( Name name, Token... args ) throws ParseException
{
super( null, name.token.beginLine );
addType( etch.compiler.ast.Extern.class );
// usage: @Extern(language, name, nameImport, serializer, serializerImport)
// example: @Extern(java, "java.util.Date", "", "etch.bindings.java.util.DateSerializer", "")
if (args.length != 5)
throw new ParseException( String.format(
"usage: @Extern(language, \"xname\", \"xnameImport\", \"serializer\", \"serializerImport\") at line %d",
name.token.beginLine ) );
language = args[0];
xname = args[1];
xnameImport = args[2];
serializer = args[3];
serializerImport = args[4];
if (language.kind != EtchGrammarConstants.ID)
throw new ParseException( String.format(
"Extern expected language to be <ID> at line %d",
language.beginLine ) );
if (xname.kind != EtchGrammarConstants.STR)
throw new ParseException( String.format(
"Extern expected xname to be <STR> at line %d",
xname.beginLine ) );
if (xnameImport.kind != EtchGrammarConstants.STR)
throw new ParseException( String.format(
"Extern expected xnameImport to be <STR> at line %d",
xnameImport.beginLine ) );
if (serializer.kind != EtchGrammarConstants.STR)
throw new ParseException( String.format(
"Extern expected serializer to be <STR> at line %d",
serializer.beginLine ) );
if (serializerImport.kind != EtchGrammarConstants.STR)
throw new ParseException( String.format(
"Extern expected serializerImport to be <STR> at line %d",
serializerImport.beginLine ) );
}
@Override
public String name()
{
return "Extern."+language.image;
}
/**
* The language of this extern opt.
*/
public final Token language;
/**
* The name of the external class.
*/
public final Token xname;
/**
* How to make the external class available in the environment.
*/
public final Token xnameImport;
/**
* The name of the serializer class.
*/
public final Token serializer;
/**
* How to make the serializer name available in the environment.
*/
public final Token serializerImport;
@Override
public void dump( String indent )
{
System.out.printf( "%s@Extern %s %s %s %s %s\n", indent, language, xname, xnameImport, serializer, serializerImport );
}
@Override
public String toString()
{
return String.format( "@Extern %s %s %s %s %s", language, xname, xnameImport, serializer, serializerImport );
}
/**
* @return the language (e.g., java) of this extern option.
*/
public Token getLanguage() {
return language;
}
/**
* @return the fully qualified class name of the serializer for this extern.
*/
public Token getSerializer() {
return serializer;
}
/**
* @return the "import" statement we might need to use to access the
* serializer class. Blank ("") means none.
*/
public Token getSerializerImport() {
return serializerImport;
}
/**
* @return the name of the external class.
*/
public Token getXname() {
return xname;
}
/**
* @return the "import" statement we might need to use to access the
* external class. Blank ("") means none.
*/
public Token getXnameImport() {
return xnameImport;
}
}