src/main/java/org/apache/sling/servlets/resolver/internal/helper/ResourceCollector.java - sling-org-apache-sling-servlets-resolver - Git at Google

 /*
  * 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 java.util.Arrays;
 import java.util.Iterator;
 import java.util.Set;

 import org.apache.commons.lang3.ArrayUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.sling.api.SlingHttpServletRequest;
 import org.apache.sling.api.request.RequestPathInfo;
 import org.apache.sling.api.resource.Resource;
 import org.apache.sling.api.resource.ResourceResolver;
 import org.apache.sling.api.servlets.ServletResolverConstants;
 import org.apache.sling.servlets.resolver.internal.SlingServletResolver;
 import org.apache.sling.servlets.resolver.internal.resource.ServletResourceProviderFactory;

 /**
  * The <code>ResourceCollector</code> class provides a single public method -
  * {@link #getServlets(ResourceResolver)} - which is used to find an ordered
  * collection of <code>Resource</code> instances which may be used to find a
  * servlet or script to handle a request to the given resource.
  */
 public class ResourceCollector extends AbstractResourceCollector {

     /**
      * The special value returned by
      * {@link #calculatePrefixMethodWeight(Resource, String, boolean)} if the
      * resource is not suitable to handle the request according to the location
      * prefix, request selectors and request extension (value is
      * <code>Integer.MIN_VALUE</code>).
      */
     protected static final int WEIGHT_NO_MATCH = Integer.MIN_VALUE;

     // the request method name used to indicate the script name
     private final String methodName;

     // the request selectors as a string converted to a realtive path or
     // null if the request has no selectors
     private final String[] requestSelectors;

     // the number of request selectors of the request or 0 if none
     private final int numRequestSelectors;

     // request is GET or HEAD
     private final boolean isGet;

     // request is GET or HEAD and extension is html
     private final boolean isDefaultExtension;

     private final String suffExt;

     private final String suffMethod;

     private final String suffExtMethod;

     /**
      * Creates a <code>ResourceCollector</code> for the given
      * <code>request</code>. If the request is a GET or HEAD request, a
      * specialized instance is returned which also takes the request selectors
      * and request extension into account for finding servlet resources.
      * Otherwise an instance of this class itself is returned which just takes
      * the resource type and request method name into account.
      *
      * @param request The <code>SlingHttpServletRequest</code> for which to
      *            return a <code>ResourceCollector</code>.
      * @return The <code>ResourceCollector</code> to find servlets and scripts
      *         suitable for handling the <code>request</code>.
      */
     public static ResourceCollector create(
             final SlingHttpServletRequest request,
             final String[] executionPaths, final String[] defaultExtensions) {
         final RequestPathInfo requestPathInfo = request.getRequestPathInfo();
         final boolean isDefaultExtension = ArrayUtils.contains(defaultExtensions, requestPathInfo.getExtension());
         return new ResourceCollector(request.getResource(), requestPathInfo.getExtension(), executionPaths, isDefaultExtension,
                 request.getMethod(), requestPathInfo.getSelectors());
     }

     public static ResourceCollector create(final Resource resource,
             final String extension,
             final String[] executionPaths, final String[] defaultExtensions,
             final String methodName, final String[] selectors
             ) {
         boolean isDefaultExtension = ArrayUtils.contains(defaultExtensions, extension);
         return new ResourceCollector(resource, extension, executionPaths, isDefaultExtension, methodName, selectors);
     }

     /**
      * Creates a <code>ResourceCollector</code> finding servlets and scripts for
      * the given <code>methodName</code>.
      *
      * @param methodName The <code>methodName</code> used to find scripts for.
      *            This must not be <code>null</code>.
      * @param baseResourceType The basic resource type to use as a final
      *            resource super type. If this is <code>null</code> the default
      *            value
      *            {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
      *            is assumed.
      * @param resource the resource to invoke, the resource type and resource
      *            super type are taken from this resource.
      * @param executionPaths the execution paths to consider
      * @deprecated use {@link #ResourceCollector(String, String, Resource, String, String[])} instead.
      */
     @Deprecated
     public ResourceCollector(final String methodName,
             final String baseResourceType, final Resource resource,
             final String[] executionPaths) {
        this(methodName, baseResourceType, resource, null, executionPaths);
     }

     /**
      * Creates a <code>ResourceCollector</code> finding servlets and scripts for
      * the given <code>methodName</code>.
      *
      * @param methodName The <code>methodName</code> used to find scripts for.
      *            This must not be <code>null</code>.
      * @param baseResourceType The basic resource type to use as a final
      *            resource super type. If this is <code>null</code> the default
      *            value
      *            {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
      *            is assumed.
      * @param resource the resource to invoke, the resource type and resource
      *            super type are taken from this resource.
      * @param extension the extension of the request being processed
      * @param executionPaths the execution paths to consider
      */
     public ResourceCollector(final String methodName,
             final String baseResourceType, final Resource resource,
             final String extension,
             final String[] executionPaths) {
         super((baseResourceType != null
                 ? baseResourceType
                 : ServletResolverConstants.DEFAULT_RESOURCE_TYPE),
             resource.getResourceType(), resource.getResourceSuperType(),
             extension, executionPaths);
         this.methodName = methodName;
         this.requestSelectors = new String[0];
         this.numRequestSelectors = 0;
         this.isGet = false;
         this.isDefaultExtension = false;

         this.suffExt = "." + extension;
         this.suffMethod = "." + methodName;
         this.suffExtMethod = suffExt + suffMethod;

         // create the hash code once
         final String key = methodName + ':' + baseResourceType + ':'
             + extension + "::"
             + (this.resourceType == null ? "" : this.resourceType) + ':'
             + (this.resourceSuperType == null ? "" : this.resourceSuperType);
         this.hashCode = key.hashCode();
     }

     /**
      * Creates a <code>ResourceCollector</code> finding servlets and scripts for
      * the given <code>resource</code>.
      *
      * @param methodName The <code>methodName</code> used to find scripts for.
      *            This must not be <code>null</code>.
      * @param baseResourceType The basic resource type to use as a final
      *            resource super type. If this is <code>null</code> the default
      *            value
      *            {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
      *            is assumed.
      */
     private ResourceCollector(final Resource resource,
             final String extension,
             final String[] executionPaths,
             final boolean isDefaultExtension,
             final String methodName,
             final String[] selectors) {
         super(ServletResolverConstants.DEFAULT_RESOURCE_TYPE,
                 resource.getResourceType(),
                 resource.getResourceSuperType(),
                 extension, executionPaths);
             this.methodName = methodName;

             this.suffExt = "." + extension;
             this.suffMethod = "." + methodName;
             this.suffExtMethod = suffExt + suffMethod;

             this.requestSelectors = selectors;
             this.numRequestSelectors = requestSelectors.length;

             this.isGet = "GET".equals(methodName) || "HEAD".equals(methodName);
             this.isDefaultExtension = isDefaultExtension;

             // create the hash code once
             final String key = methodName + ':' + baseResourceType + ':'
                 + extension + ':' + StringUtils.join(requestSelectors, '.') + ':'
                 + (this.resourceType == null ? "" : this.resourceType) + ':'
                 + (this.resourceSuperType == null ? "" : this.resourceSuperType);
             this.hashCode = key.hashCode();
     }

     @Override
     protected void getWeightedResources(final Set<WeightedResource> resources,
             final Resource location) {

         final ResourceResolver resolver = location.getResourceResolver();
         Resource current = location;
         String parentName = current.getName();

         int selIdx = 0;
         String selector;
         do {
             selector = (selIdx < numRequestSelectors)
                     ? requestSelectors[selIdx]
                     : null;

             Iterator<Resource> children = resolver.listChildren(current);
             while (children.hasNext()) { // NOSONAR
                 Resource child = children.next();

                 if (!SlingServletResolver.isPathAllowed(child.getPath(), this.executionPaths)) {
                     continue;
                 }
                 String scriptName = child.getName();
                 int lastDot = scriptName.lastIndexOf('.');
                 if (lastDot < 0) {
                     // no extension in the name, this is not a script
                     continue;
                 }

                 scriptName = scriptName.substring(0, lastDot);

                 if (isGet
                     && checkScriptName(scriptName, selector, parentName,
                         suffExt, null, resources, child, selIdx)) {
                     continue;
                 }

                 if (checkScriptName(scriptName, selector, parentName,
                     suffExtMethod, suffMethod, resources, child, selIdx)) {
                     continue;
                 }

                 // SLING-754: Not technically really correct because
                 // the request extension is only optional in the script
                 // name for HTML methods, but we keep this for backwards
                 // compatibility.
                 if (selector != null
                     && matches(scriptName, selector, suffMethod)) {
                     addWeightedResource(resources, child, selIdx + 1,
                         WeightedResource.WEIGHT_NONE);
                     continue;
                 }

                 if (scriptName.equals(methodName)) {
                     addWeightedResource(resources, child, selIdx,
                         WeightedResource.WEIGHT_NONE);
                 }
             }

             if (selector != null) {
                 current = resolver.getResource(current, selector);
                 parentName = selector;
                 selIdx++;
             }
         } while (selector != null && current != null);

         // special treatment for servlets registered with neither a method
         // name nor extensions and selectors
         addLocationServlet(resources, location);
     }

     /**
      * Checks whether the <code>scriptName</code> matches a certain number of
      * combinations of <code>selector</code>, <code>parentName</code>,
      * <code>suffix</code> and <code>htmlSuffix</code>. If a match is found the
      * {@link #addWeightedResource(Set, Resource, int, int)} method is called to
      * register the found script resource with appropriate selection weight.
      *
      * @param scriptName The name of the script (without the script extension)
      *            to check for compliance.
      * @param selector The current selector to check for in the script name; may
      *            be <code>null</code>.
      * @param parentName The name of the parent folder; must not be
      *            <code>null</code>.
      * @param suffix Expected second part of the script name (besides either the
      *            selector or the parent name); must not be <code>null</code>;
      *            applicable for any request method.
      * @param htmlSuffix Expected second part of the script name (besides either
      *            the selector or the parent name); may be <code>null</code>;
      *            applicable for GET or HEAD methods only.
      * @param resources The set of weighted resource to which the new weighted
      *            resource is added if a match is found.
      * @param child The resource representing the script
      * @param selIdx The selector weight value
      * @return <code>true</code> if a match has been found and a weighted
      *         resource has been added to the <code>resources</code> set.
      */
     private boolean checkScriptName(final String scriptName,
             final String selector, final String parentName,
             final String suffix, final String htmlSuffix,
             final Set<WeightedResource> resources, final Resource child,
             final int selIdx) {
         if (selector != null && matches(scriptName, selector, suffix)) {
             addWeightedResource(resources, child, selIdx + 1,
                 WeightedResource.WEIGHT_EXTENSION);
             return true;
         }

         if (matches(scriptName, parentName, suffix)) {
             addWeightedResource(resources, child, selIdx,
                 WeightedResource.WEIGHT_EXTENSION
                     + WeightedResource.WEIGHT_PREFIX + ((htmlSuffix != null) ? WeightedResource.WEIGHT_METHOD : WeightedResource.WEIGHT_NONE));
             return true;
         }

         if (suffix != null && !suffix.isEmpty() && scriptName.equals(suffix.substring(1))) {
             addWeightedResource(resources, child, selIdx,
                 WeightedResource.WEIGHT_EXTENSION + ((htmlSuffix != null) ? WeightedResource.WEIGHT_METHOD : WeightedResource.WEIGHT_NONE));
             return true;
         }

         if (isDefaultExtension) {
             if (selector != null && matches(scriptName, selector, htmlSuffix)) {
                 addWeightedResource(resources, child, selIdx + 1,
                     WeightedResource.WEIGHT_NONE);
                 return true;
             }

             if (matches(scriptName, parentName, htmlSuffix)) {
                 addWeightedResource(resources, child, selIdx,
                     WeightedResource.WEIGHT_PREFIX);
                 return true;
             }
         }
         return false;
     }

     private boolean matches(final String scriptName, final String name,
             String suffix) {
         if (suffix == null) {
             return scriptName.equals(name);
         }
         final int lenScriptName = scriptName.length();
         final int lenName = name.length();
         final int lenSuffix = suffix.length();
         return scriptName.regionMatches(0, name, 0, lenName)
             && scriptName.regionMatches(lenName, suffix, 0, lenSuffix)
             && lenScriptName == (lenName + lenSuffix);
     }

     private void addLocationServlet(final Set<WeightedResource> resources,
             final Resource location) {
         final String path = location.getPath()
             + ServletResourceProviderFactory.SERVLET_PATH_EXTENSION;
         if (SlingServletResolver.isPathAllowed(path, this.executionPaths)) {
             final Resource servlet = location.getResourceResolver().getResource(
                 path);
             if (servlet != null) {
                 addWeightedResource(resources, servlet, 0,
                     WeightedResource.WEIGHT_LAST_RESSORT);
             }
         }
     }

     @Override
     public int hashCode() {
         final int prime = 31;
         int result = super.hashCode();
         result = prime * result + (isDefaultExtension ? 1231 : 1237);
         result = prime * result + (isGet ? 1231 : 1237);
         result = prime * result + ((methodName == null) ? 0 : methodName.hashCode());
         result = prime * result + numRequestSelectors;
         result = prime * result + Arrays.hashCode(requestSelectors);
         return result;
     }

     @Override
     public boolean equals(Object obj) {
         if (this == obj)
             return true;
         if (!super.equals(obj))
             return false;
         if (getClass() != obj.getClass())
             return false;
         ResourceCollector other = (ResourceCollector) obj;
         if (isDefaultExtension != other.isDefaultExtension)
             return false;
         if (isGet != other.isGet)
             return false;
         if (methodName == null) {
             if (other.methodName != null)
                 return false;
         } else if (!methodName.equals(other.methodName))
             return false;
         if (numRequestSelectors != other.numRequestSelectors)
             return false;
         return Arrays.equals(requestSelectors, other.requestSelectors);
     }

 }
	/*
	* 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 java.util.Arrays;
	import java.util.Iterator;
	import java.util.Set;

	import org.apache.commons.lang3.ArrayUtils;
	import org.apache.commons.lang3.StringUtils;
	import org.apache.sling.api.SlingHttpServletRequest;
	import org.apache.sling.api.request.RequestPathInfo;
	import org.apache.sling.api.resource.Resource;
	import org.apache.sling.api.resource.ResourceResolver;
	import org.apache.sling.api.servlets.ServletResolverConstants;
	import org.apache.sling.servlets.resolver.internal.SlingServletResolver;
	import org.apache.sling.servlets.resolver.internal.resource.ServletResourceProviderFactory;

	/**
	* The <code>ResourceCollector</code> class provides a single public method -
	* {@link #getServlets(ResourceResolver)} - which is used to find an ordered
	* collection of <code>Resource</code> instances which may be used to find a
	* servlet or script to handle a request to the given resource.
	*/
	public class ResourceCollector extends AbstractResourceCollector {

	/**
	* The special value returned by
	* {@link #calculatePrefixMethodWeight(Resource, String, boolean)} if the
	* resource is not suitable to handle the request according to the location
	* prefix, request selectors and request extension (value is
	* <code>Integer.MIN_VALUE</code>).
	*/
	protected static final int WEIGHT_NO_MATCH = Integer.MIN_VALUE;

	// the request method name used to indicate the script name
	private final String methodName;

	// the request selectors as a string converted to a realtive path or
	// null if the request has no selectors
	private final String[] requestSelectors;

	// the number of request selectors of the request or 0 if none
	private final int numRequestSelectors;

	// request is GET or HEAD
	private final boolean isGet;

	// request is GET or HEAD and extension is html
	private final boolean isDefaultExtension;

	private final String suffExt;

	private final String suffMethod;

	private final String suffExtMethod;

	/**
	* Creates a <code>ResourceCollector</code> for the given
	* <code>request</code>. If the request is a GET or HEAD request, a
	* specialized instance is returned which also takes the request selectors
	* and request extension into account for finding servlet resources.
	* Otherwise an instance of this class itself is returned which just takes
	* the resource type and request method name into account.
	*
	* @param request The <code>SlingHttpServletRequest</code> for which to
	* return a <code>ResourceCollector</code>.
	* @return The <code>ResourceCollector</code> to find servlets and scripts
	* suitable for handling the <code>request</code>.
	*/
	public static ResourceCollector create(
	final SlingHttpServletRequest request,
	final String[] executionPaths, final String[] defaultExtensions) {
	final RequestPathInfo requestPathInfo = request.getRequestPathInfo();
	final boolean isDefaultExtension = ArrayUtils.contains(defaultExtensions, requestPathInfo.getExtension());
	return new ResourceCollector(request.getResource(), requestPathInfo.getExtension(), executionPaths, isDefaultExtension,
	request.getMethod(), requestPathInfo.getSelectors());
	}

	public static ResourceCollector create(final Resource resource,
	final String extension,
	final String[] executionPaths, final String[] defaultExtensions,
	final String methodName, final String[] selectors
	) {
	boolean isDefaultExtension = ArrayUtils.contains(defaultExtensions, extension);
	return new ResourceCollector(resource, extension, executionPaths, isDefaultExtension, methodName, selectors);
	}

	/**
	* Creates a <code>ResourceCollector</code> finding servlets and scripts for
	* the given <code>methodName</code>.
	*
	* @param methodName The <code>methodName</code> used to find scripts for.
	* This must not be <code>null</code>.
	* @param baseResourceType The basic resource type to use as a final
	* resource super type. If this is <code>null</code> the default
	* value
	* {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
	* is assumed.
	* @param resource the resource to invoke, the resource type and resource
	* super type are taken from this resource.
	* @param executionPaths the execution paths to consider
	* @deprecated use {@link #ResourceCollector(String, String, Resource, String, String[])} instead.
	*/
	@Deprecated
	public ResourceCollector(final String methodName,
	final String baseResourceType, final Resource resource,
	final String[] executionPaths) {
	this(methodName, baseResourceType, resource, null, executionPaths);
	}

	/**
	* Creates a <code>ResourceCollector</code> finding servlets and scripts for
	* the given <code>methodName</code>.
	*
	* @param methodName The <code>methodName</code> used to find scripts for.
	* This must not be <code>null</code>.
	* @param baseResourceType The basic resource type to use as a final
	* resource super type. If this is <code>null</code> the default
	* value
	* {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
	* is assumed.
	* @param resource the resource to invoke, the resource type and resource
	* super type are taken from this resource.
	* @param extension the extension of the request being processed
	* @param executionPaths the execution paths to consider
	*/
	public ResourceCollector(final String methodName,
	final String baseResourceType, final Resource resource,
	final String extension,
	final String[] executionPaths) {
	super((baseResourceType != null
	? baseResourceType
	: ServletResolverConstants.DEFAULT_RESOURCE_TYPE),
	resource.getResourceType(), resource.getResourceSuperType(),
	extension, executionPaths);
	this.methodName = methodName;
	this.requestSelectors = new String[0];
	this.numRequestSelectors = 0;
	this.isGet = false;
	this.isDefaultExtension = false;

	this.suffExt = "." + extension;
	this.suffMethod = "." + methodName;
	this.suffExtMethod = suffExt + suffMethod;

	// create the hash code once
	final String key = methodName + ':' + baseResourceType + ':'
	+ extension + "::"
	+ (this.resourceType == null ? "" : this.resourceType) + ':'
	+ (this.resourceSuperType == null ? "" : this.resourceSuperType);
	this.hashCode = key.hashCode();
	}

	/**
	* Creates a <code>ResourceCollector</code> finding servlets and scripts for
	* the given <code>resource</code>.
	*
	* @param methodName The <code>methodName</code> used to find scripts for.
	* This must not be <code>null</code>.
	* @param baseResourceType The basic resource type to use as a final
	* resource super type. If this is <code>null</code> the default
	* value
	* {@link org.apache.sling.servlets.resolver.internal.ServletResolverConstants#DEFAULT_SERVLET_NAME}
	* is assumed.
	*/
	private ResourceCollector(final Resource resource,
	final String extension,
	final String[] executionPaths,
	final boolean isDefaultExtension,
	final String methodName,
	final String[] selectors) {
	super(ServletResolverConstants.DEFAULT_RESOURCE_TYPE,
	resource.getResourceType(),
	resource.getResourceSuperType(),
	extension, executionPaths);
	this.methodName = methodName;

	this.suffExt = "." + extension;
	this.suffMethod = "." + methodName;
	this.suffExtMethod = suffExt + suffMethod;

	this.requestSelectors = selectors;
	this.numRequestSelectors = requestSelectors.length;

	this.isGet = "GET".equals(methodName) \|\| "HEAD".equals(methodName);
	this.isDefaultExtension = isDefaultExtension;

	// create the hash code once
	final String key = methodName + ':' + baseResourceType + ':'
	+ extension + ':' + StringUtils.join(requestSelectors, '.') + ':'
	+ (this.resourceType == null ? "" : this.resourceType) + ':'
	+ (this.resourceSuperType == null ? "" : this.resourceSuperType);
	this.hashCode = key.hashCode();
	}

	@Override
	protected void getWeightedResources(final Set<WeightedResource> resources,
	final Resource location) {

	final ResourceResolver resolver = location.getResourceResolver();
	Resource current = location;
	String parentName = current.getName();

	int selIdx = 0;
	String selector;
	do {
	selector = (selIdx < numRequestSelectors)
	? requestSelectors[selIdx]
	: null;

	Iterator<Resource> children = resolver.listChildren(current);
	while (children.hasNext()) { // NOSONAR
	Resource child = children.next();

	if (!SlingServletResolver.isPathAllowed(child.getPath(), this.executionPaths)) {
	continue;
	}
	String scriptName = child.getName();
	int lastDot = scriptName.lastIndexOf('.');
	if (lastDot < 0) {
	// no extension in the name, this is not a script
	continue;
	}

	scriptName = scriptName.substring(0, lastDot);

	if (isGet
	&& checkScriptName(scriptName, selector, parentName,
	suffExt, null, resources, child, selIdx)) {
	continue;
	}

	if (checkScriptName(scriptName, selector, parentName,
	suffExtMethod, suffMethod, resources, child, selIdx)) {
	continue;
	}

	// SLING-754: Not technically really correct because
	// the request extension is only optional in the script
	// name for HTML methods, but we keep this for backwards
	// compatibility.
	if (selector != null
	&& matches(scriptName, selector, suffMethod)) {
	addWeightedResource(resources, child, selIdx + 1,
	WeightedResource.WEIGHT_NONE);
	continue;
	}

	if (scriptName.equals(methodName)) {
	addWeightedResource(resources, child, selIdx,
	WeightedResource.WEIGHT_NONE);
	}
	}

	if (selector != null) {
	current = resolver.getResource(current, selector);
	parentName = selector;
	selIdx++;
	}
	} while (selector != null && current != null);

	// special treatment for servlets registered with neither a method
	// name nor extensions and selectors
	addLocationServlet(resources, location);
	}

	/**
	* Checks whether the <code>scriptName</code> matches a certain number of
	* combinations of <code>selector</code>, <code>parentName</code>,
	* <code>suffix</code> and <code>htmlSuffix</code>. If a match is found the
	* {@link #addWeightedResource(Set, Resource, int, int)} method is called to
	* register the found script resource with appropriate selection weight.
	*
	* @param scriptName The name of the script (without the script extension)
	* to check for compliance.
	* @param selector The current selector to check for in the script name; may
	* be <code>null</code>.
	* @param parentName The name of the parent folder; must not be
	* <code>null</code>.
	* @param suffix Expected second part of the script name (besides either the
	* selector or the parent name); must not be <code>null</code>;
	* applicable for any request method.
	* @param htmlSuffix Expected second part of the script name (besides either
	* the selector or the parent name); may be <code>null</code>;
	* applicable for GET or HEAD methods only.
	* @param resources The set of weighted resource to which the new weighted
	* resource is added if a match is found.
	* @param child The resource representing the script
	* @param selIdx The selector weight value
	* @return <code>true</code> if a match has been found and a weighted
	* resource has been added to the <code>resources</code> set.
	*/
	private boolean checkScriptName(final String scriptName,
	final String selector, final String parentName,
	final String suffix, final String htmlSuffix,
	final Set<WeightedResource> resources, final Resource child,
	final int selIdx) {
	if (selector != null && matches(scriptName, selector, suffix)) {
	addWeightedResource(resources, child, selIdx + 1,
	WeightedResource.WEIGHT_EXTENSION);
	return true;
	}

	if (matches(scriptName, parentName, suffix)) {
	addWeightedResource(resources, child, selIdx,
	WeightedResource.WEIGHT_EXTENSION
	+ WeightedResource.WEIGHT_PREFIX + ((htmlSuffix != null) ? WeightedResource.WEIGHT_METHOD : WeightedResource.WEIGHT_NONE));
	return true;
	}

	if (suffix != null && !suffix.isEmpty() && scriptName.equals(suffix.substring(1))) {
	addWeightedResource(resources, child, selIdx,
	WeightedResource.WEIGHT_EXTENSION + ((htmlSuffix != null) ? WeightedResource.WEIGHT_METHOD : WeightedResource.WEIGHT_NONE));
	return true;
	}

	if (isDefaultExtension) {
	if (selector != null && matches(scriptName, selector, htmlSuffix)) {
	addWeightedResource(resources, child, selIdx + 1,
	WeightedResource.WEIGHT_NONE);
	return true;
	}

	if (matches(scriptName, parentName, htmlSuffix)) {
	addWeightedResource(resources, child, selIdx,
	WeightedResource.WEIGHT_PREFIX);
	return true;
	}
	}
	return false;
	}

	private boolean matches(final String scriptName, final String name,
	String suffix) {
	if (suffix == null) {
	return scriptName.equals(name);
	}
	final int lenScriptName = scriptName.length();
	final int lenName = name.length();
	final int lenSuffix = suffix.length();
	return scriptName.regionMatches(0, name, 0, lenName)
	&& scriptName.regionMatches(lenName, suffix, 0, lenSuffix)
	&& lenScriptName == (lenName + lenSuffix);
	}

	private void addLocationServlet(final Set<WeightedResource> resources,
	final Resource location) {
	final String path = location.getPath()
	+ ServletResourceProviderFactory.SERVLET_PATH_EXTENSION;
	if (SlingServletResolver.isPathAllowed(path, this.executionPaths)) {
	final Resource servlet = location.getResourceResolver().getResource(
	path);
	if (servlet != null) {
	addWeightedResource(resources, servlet, 0,
	WeightedResource.WEIGHT_LAST_RESSORT);
	}
	}
	}

	@Override
	public int hashCode() {
	final int prime = 31;
	int result = super.hashCode();
	result = prime * result + (isDefaultExtension ? 1231 : 1237);
	result = prime * result + (isGet ? 1231 : 1237);
	result = prime * result + ((methodName == null) ? 0 : methodName.hashCode());
	result = prime * result + numRequestSelectors;
	result = prime * result + Arrays.hashCode(requestSelectors);
	return result;
	}

	@Override
	public boolean equals(Object obj) {
	if (this == obj)
	return true;
	if (!super.equals(obj))
	return false;
	if (getClass() != obj.getClass())
	return false;
	ResourceCollector other = (ResourceCollector) obj;
	if (isDefaultExtension != other.isDefaultExtension)
	return false;
	if (isGet != other.isGet)
	return false;
	if (methodName == null) {
	if (other.methodName != null)
	return false;
	} else if (!methodName.equals(other.methodName))
	return false;
	if (numRequestSelectors != other.numRequestSelectors)
	return false;
	return Arrays.equals(requestSelectors, other.requestSelectors);
	}

	}