/* | |
* 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.util.Map; | |
import java.util.function.Predicate; | |
import java.util.stream.Stream; | |
import org.apache.sling.api.resource.Resource; | |
import org.apache.sling.resource.filter.ResourceFilterStream; | |
/** | |
* Creates a {@link Predicate} of type {@link Resource} to identify matching | |
* Resource objects | |
* | |
*/ | |
public class ResourceFilterStream { | |
private ResourceStream resources; | |
private ResourceFilter resourceFilter; | |
private Predicate<Resource> branchSelector = resource -> true; | |
private Predicate<Resource> childSelector = resource -> true; | |
public ResourceFilterStream(Resource resource, ResourceFilter filter) { | |
resources = new ResourceStream(resource); | |
this.resourceFilter = filter; | |
} | |
/** | |
* Adds a branchSelector to define which child resource are acceptable to travel | |
* down as part of the Resource traversal | |
* | |
* @param branchSelector | |
* resourceFilter script for traversal control | |
* @return ResourceStreamFilter | |
* @throws ResourceFilterException | |
*/ | |
public ResourceFilterStream setBranchSelector(String branchSelector) { | |
this.branchSelector = resourceFilter.parse(branchSelector); | |
return this; | |
} | |
/** | |
* Adds a childSelector to define which child resources should be part of the | |
* stream | |
* | |
* @param childSelector | |
* resourceFilter script to identify child resources to return | |
* @return ResourceStreamFilter | |
* @throws ResourceFilterException | |
*/ | |
public ResourceFilterStream setChildSelector(String childSelector) { | |
this.childSelector = resourceFilter.parse(childSelector); | |
return this; | |
} | |
/** | |
* Add a key - value pair that can then be evaluated as part of the Script | |
* | |
* @param params | |
* @return | |
*/ | |
public ResourceFilterStream addParam(String key, Object value) { | |
resourceFilter.addParam(key, value); | |
return this; | |
} | |
/** | |
* Add a series of key - value pairs that can then be evaluated as part of the | |
* ScriptFilter | |
* | |
* @param params | |
* @return | |
*/ | |
public ResourceFilterStream addParams(Map<String, Object> params) { | |
resourceFilter.addParams(params); | |
return this; | |
} | |
/** | |
* Stream<Resource> which uses the branchSelector as the basis of the traversal | |
* and then filters the resources based on the childSelector that was provided | |
* | |
* @return pre filterd Stream<Resource> | |
*/ | |
public Stream<Resource> stream() { | |
return resources.stream(branchSelector).filter(childSelector); | |
} | |
} |