    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005// http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.internal.services.javascript;
    014
    015import org.apache.tapestry5.Asset;
    016import org.apache.tapestry5.commons.Resource;
    017import org.apache.tapestry5.commons.util.AvailableValues;
    018import org.apache.tapestry5.commons.util.UnknownValueException;
    019import org.apache.tapestry5.func.F;
    020import org.apache.tapestry5.services.javascript.JavaScriptStack;
    021import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
    022
    023import java.util.List;
    024import java.util.Map;
    025
    026public class JavaScriptStackSourceImpl implements JavaScriptStackSource
    027{
    028    private final Map<String, JavaScriptStack> configuration;
    029
    030    public JavaScriptStackSourceImpl(Map<String, JavaScriptStack> configuration)
    031    {
    032        this.configuration = configuration;
    033    }
    034
    035    public JavaScriptStack getStack(String name)
    036    {
    037        JavaScriptStack stack = findStack(name);
    038
    039        if (stack == null)
    040        {
    041            throw new UnknownValueException(String.format("No JavaScriptStack with name '%s'.", name),
    042                    new AvailableValues("Configured JavaScript stacks", configuration));
    043        }
    044
    045        return stack;
    046    }
    047
    048    public JavaScriptStack findStack(String name)
    049    {
    050        return configuration.get(name);
    051    }
    052
    053    public List<String> getStackNames()
    054    {
    055        return F.flow(configuration.keySet()).sort().toList();
    056    }
    057
    058    @Override
    059    public JavaScriptStack findStackForJavaScriptLibrary(Resource resource)
    060    {
    061        for (JavaScriptStack stack : configuration.values())
    062        {
    063            for (Asset libraryAsset : stack.getJavaScriptLibraries())
    064            {
    065                if (libraryAsset.getResource().equals(resource))
    066                {
    067                    return stack;
    068                }
    069            }
    070        }
    071
    072        return null;
    073    }
    074}