/* | |
* 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 org.apache.sling.resource.filter; | |
import java.io.ByteArrayInputStream; | |
import java.util.function.Predicate; | |
import org.apache.sling.api.resource.Resource; | |
import org.apache.sling.resource.filter.api.Context; | |
import org.apache.sling.resource.filter.api.impl.ComparisonVisitor; | |
import org.apache.sling.resource.filter.api.impl.DefaultContext; | |
import org.apache.sling.resource.filter.api.impl.LogicVisitor; | |
import org.apache.sling.resource.filter.impl.FilterParser; | |
import org.apache.sling.resource.filter.impl.ParseException; | |
import org.apache.sling.resource.filter.impl.node.Node; | |
public class ResourceFilter implements Predicate<Resource> { | |
private Predicate<Resource> parsedPredicate; | |
private Context context; | |
public ResourceFilter(String filter) throws ParseException { | |
Node rootNode = new FilterParser(new ByteArrayInputStream(filter.getBytes())).parse(); | |
this.parsedPredicate = rootNode.accept(getContext().getLogicVisitor()); | |
} | |
@Override | |
public boolean test(Resource resource) { | |
return parsedPredicate.test(resource); | |
} | |
public Context getContext() { | |
if (context == null) { | |
context = new DefaultContext(); | |
new LogicVisitor(context); | |
new ComparisonVisitor(context); | |
} | |
return context; | |
} | |
public ResourceFilter setContext(Context context) { | |
this.context = context; | |
return this; | |
} | |
public ResourceFilter addArgument(String key, Object value) { | |
getContext().addArgument(key, value); | |
return this; | |
} | |
} |