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* 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
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package org.apache.sling.scripting.sightly.js.impl.use;
import javax.script.Bindings;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.scripting.sightly.SightlyException;
import org.apache.sling.scripting.sightly.js.impl.JsEnvironment;
import org.apache.sling.scripting.sightly.js.impl.Utils;
import org.apache.sling.scripting.sightly.js.impl.async.UnaryCallback;
/**
* Resolves dependencies specified by the Use function
*/
public class DependencyResolver {
private final Resource caller;
private final JsEnvironment jsEnvironment;
private final Bindings globalBindings;
public DependencyResolver(Resource resource, JsEnvironment jsEnvironment, Bindings globalBindings) {
this.caller = resource;
this.jsEnvironment = jsEnvironment;
this.globalBindings = globalBindings;
}
/**
* Resolve a dependency
* @param dependency the dependency identifier
* @param callback the callback that will receive the resolved dependency
*/
public void resolve(String dependency, UnaryCallback callback) {
if (!Utils.isJsScript(dependency)) {
throw new SightlyException("Only JS scripts are allowed as dependencies. Invalid dependency: " + dependency);
}
Resource scriptResource = Utils.getScriptResource(caller, dependency, globalBindings);
jsEnvironment.runResource(scriptResource, globalBindings, Utils.EMPTY_BINDINGS, callback);
}
}