/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.flex.compiler.internal.fxg.sax;
import java.io.IOException;
import java.io.Reader;
import java.util.Collection;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.apache.flex.compiler.fxg.IFXGParser;
import org.apache.flex.compiler.fxg.dom.IFXGNode;
import org.apache.flex.compiler.problems.FXGParserProblem;
import org.apache.flex.compiler.problems.ICompilerProblem;
/**
* FXGSAXParser implements a SAX parser for an input stream that represents a
* FXG document
*/
public class FXGSAXParser implements IFXGParser
{
private FXGSAXScanner scanner = null;
/**
* Constructs a new FXGSAXParser.
*
* The scanner is initialized so that nodes and skipped elements can be
* registered
*/
public FXGSAXParser()
{
}
/**
* Parses an FXG document InputStream to produce an IFXGNode based DOM.
*
* @param reader - input to be parsed
* @param problems problem collection used to collect problems occurred within this method
* @return the root IFXGNode of the DOM
*/
@Override
public IFXGNode parse(Reader reader, Collection<ICompilerProblem> problems)
{
return parse(reader, null, problems);
}
/**
* Parses an FXG document InputStream to produce an IFXGNode based DOM.
*
* @param reader - input to be parsed
* @param documentPath - the path of the FXG document which can be useful
* for error reporting.
* @param problems problem collection used to collect problems occurred within this method
* @return the root IFXGNode of the DOM
*/
@Override
public IFXGNode parse(Reader reader, String documentPath, Collection<ICompilerProblem> problems)
{
try
{
scanner = new FXGSAXScanner(problems);
scanner.setDocumentPath(documentPath);
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
saxFactory.setValidating(false);
saxFactory.setNamespaceAware(true);
SAXParser parser = saxFactory.newSAXParser();
InputSource is = new InputSource(reader);
parser.parse(is, scanner);
IFXGNode node = scanner.getRootNode();
return node;
}
catch (IOException ex)
{
problems.add(new FXGParserProblem(documentPath, scanner.getStartLine(),
scanner.getStartColumn(), ex.getLocalizedMessage()));
}
catch (ParserConfigurationException ex)
{
problems.add(new FXGParserProblem(documentPath, scanner.getStartLine(),
scanner.getStartColumn(), ex.getLocalizedMessage()));
}
catch (SAXException ex)
{
problems.add(new FXGParserProblem(documentPath, scanner.getStartLine(),
scanner.getStartColumn(), ex.getLocalizedMessage()));
}
finally
{
try
{
reader.close();
}
catch(Exception e)
{
//do nothing
}
}
return null;
}
}