/*
*
* 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.caches;
import java.io.FileNotFoundException;
import java.lang.ref.SoftReference;
import java.util.List;
import org.apache.commons.io.IOUtils;
import org.apache.flex.compiler.filespecs.IFileSpecification;
import org.apache.flex.compiler.internal.mxml.MXMLData;
import org.apache.flex.compiler.internal.parsing.mxml.MXMLToken;
import org.apache.flex.compiler.internal.parsing.mxml.MXMLTokenizer;
/**
* Concurrent cache for parsed MXML models. The cache is a list of key-value pairs.
* The key is an {@code IFileSpecificaton} for an MXML file.
* The value is a {@link SoftReference} to a DOM-like {@link MXMLData} object.
*/
public class MXMLDataCache extends ConcurrentCacheStoreBase<MXMLData>
{
private static class MXMLDataCacheKey extends CacheStoreKeyBase
{
public MXMLDataCacheKey(IFileSpecification fileSpec)
{
assert fileSpec != null;
this.fileSpec = fileSpec;
}
private IFileSpecification fileSpec; // non-null
@Override
public String generateKey()
{
return String.valueOf(fileSpec.isOpenDocument()) + ":" + fileSpec.getPath();
}
}
public static MXMLDataCacheKey createKey(IFileSpecification fileSpec)
{
return new MXMLDataCacheKey(fileSpec);
}
/**
* Constructor.
*/
public MXMLDataCache()
{
super();
}
/**
* Get the {@code MXMLData} to be associated with the key.
*
* @param key The key is an {@code MXMLDataCacheKey} object,
* which encapsulates an {@code IFileSpecification} for an MXML file.
*/
@Override
protected MXMLData createEntryValue(CacheStoreKeyBase key)
{
final IFileSpecification fileSpec = ((MXMLDataCacheKey)key).fileSpec;
// Tokenize the MXML file.
final MXMLTokenizer tokenizer = new MXMLTokenizer(fileSpec);
try
{
List<MXMLToken> tokens = tokenizer.parseTokens(fileSpec.createReader());
// Build tags and attributes from the tokens.
final MXMLData mxmlData = new MXMLData(tokens, tokenizer.getPrefixMap(), fileSpec);
return mxmlData;
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
finally
{
IOUtils.closeQuietly(tokenizer);
}
}
}