| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * 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 |
| * "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.servlets.resolver.internal.helper; |
| |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.api.resource.ResourceWrapper; |
| |
| /** |
| * The <code>WeightedResource</code> is a <code>Resource</code> which is |
| * attributed with weight values to make it a <code>Comparable</code> to be |
| * used to build the result collection returned by |
| * {@link ResourceCollector#getServlets(Resource)}. |
| * <p> |
| * The order amongst <code>WeightedResource</code> instances is defined as |
| * follows and implemented in the {@link #compareTo(WeightedResource)} method: |
| * <ol> |
| * <li>The instance with more matching selectors ({@link #getNumSelectors()}) |
| * is ordered before the instance with less matching selectors.</li> |
| * <li>If the matching selectors are equal, the instance with the higher |
| * method/prefix weight ({@link #getMethodPrefixWeight()}) is order before the |
| * instance with a lower method/prefix weight.</li> |
| * <li>Finally, if also the method/prefix weights are equal, the instance with |
| * the lower ordinal number ({@link #getOrdinal()} is ordered before the |
| * instance with the higher ordinal number.</li> |
| * </ol> |
| */ |
| final class WeightedResource extends ResourceWrapper implements |
| Comparable<WeightedResource> { |
| |
| /** |
| * Weight value assigned to an instance just bearing request method name |
| * (value is 0). |
| */ |
| static final int WEIGHT_NONE = 0; |
| |
| /** |
| * Weight value assigned to an instance if the the resource name neither |
| * contains the parent resource name as a prefix, nor the request method |
| * name nor the request extension (value is -1). |
| */ |
| static final int WEIGHT_LAST_RESSORT = -1; |
| |
| /** |
| * Weight value added to method/prefix weight if the resource name contains |
| * the the name of the parent resource as its prefix (value is 1). |
| */ |
| static final int WEIGHT_PREFIX = 1; |
| |
| /** |
| * Weight value added to method/prefix weight if the resource name contains |
| * the request extension (value is 2). |
| */ |
| static final int WEIGHT_EXTENSION = 2; |
| |
| private final int ordinal; |
| |
| private final int numSelectors; |
| |
| private final int methodPrefixWeight; |
| |
| WeightedResource(int ordinal, Resource resource, int numSelectors, |
| int methodPrefixWeight) { |
| super(resource); |
| |
| this.ordinal = ordinal; |
| this.numSelectors = numSelectors; |
| this.methodPrefixWeight = methodPrefixWeight; |
| } |
| |
| final public int getOrdinal() { |
| return ordinal; |
| } |
| |
| final public int getNumSelectors() { |
| return numSelectors; |
| } |
| |
| final public int getMethodPrefixWeight() { |
| return methodPrefixWeight; |
| } |
| |
| @Override |
| final public int hashCode() { |
| return ordinal; |
| } |
| |
| @Override |
| final public boolean equals(Object obj) { |
| return obj == this; |
| } |
| |
| @Override |
| final public String toString() { |
| return getClass().getSimpleName() + "[" + getOrdinal() + "]: " |
| + getResource() + ", #selectors=" + getNumSelectors() |
| + ", methodPrefixWeight=" + getMethodPrefixWeight(); |
| } |
| |
| final public int compareTo(WeightedResource o) { |
| if (equals(o)) { |
| return 0; |
| } |
| |
| // compare by the number of selectors (more selectors wins) |
| if (numSelectors > o.numSelectors) { |
| return -1; |
| } else if (numSelectors < o.numSelectors) { |
| return 1; |
| } |
| |
| // selectors are equal, check method/extension weight (higher wins) |
| if (methodPrefixWeight > o.methodPrefixWeight) { |
| return -1; |
| } else if (methodPrefixWeight < o.methodPrefixWeight) { |
| return 1; |
| } |
| |
| return 0; |
| } |
| } |