/*
* Copyright (C) 2010 Google 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 com.google.clearsilver.jsilver.resourceloader;
import com.google.clearsilver.jsilver.exceptions.JSilverTemplateNotFoundException;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* ResourceLoader that pulls all items from memory. This is particularly useful for small templates
* that can be embedded in code (e.g. in unit tests).
*
* Content needs to be stored first using the {@link #store(String, String)} method.
*
* @see ResourceLoader
*/
public class InMemoryResourceLoader extends BaseResourceLoader {
private ConcurrentMap<String, String> items = new ConcurrentHashMap<String, String>();
@Override
public Reader open(String name) throws IOException {
String content = items.get(name);
return content == null ? null : new StringReader(content);
}
@Override
public Reader openOrFail(String name) throws JSilverTemplateNotFoundException, IOException {
Reader reader = open(name);
if (reader == null) {
throw new JSilverTemplateNotFoundException(name);
} else {
return reader;
}
}
public void store(String name, String contents) {
items.put(name, contents);
}
public void remove(String name) {
items.remove(name);
}
public ConcurrentMap<String, String> getItems() {
return items;
}
}