Optimise get() method

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / acr / ContentUtils.java

diff --git a/org.argeo.cms/src/org/argeo/cms/acr/ContentUtils.java b/org.argeo.cms/src/org/argeo/cms/acr/ContentUtils.java
index ed27ce8e8366a24c5fcd2ce0e285026c3ff1afa9..cfd90f93c1d5e77aa86e900985646095204adf4c 100644 (file)
--- a/org.argeo.cms/src/org/argeo/cms/acr/ContentUtils.java
+++ b/org.argeo.cms/src/org/argeo/cms/acr/ContentUtils.java
@@ -3,6 +3,7 @@ package org.argeo.cms.acr;
 import java.io.PrintStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.StringJoiner;
 import java.util.function.BiConsumer;
 
@@ -16,9 +17,9 @@ import org.argeo.api.acr.ContentSession;
 import org.argeo.api.acr.DName;
 import org.argeo.api.cms.CmsAuth;
 import org.argeo.api.cms.directory.CmsDirectory;
+import org.argeo.api.cms.directory.CmsUserManager;
 import org.argeo.api.cms.directory.HierarchyUnit;
 import org.argeo.api.cms.directory.UserDirectory;
-import org.argeo.cms.CmsUserManager;
 import org.argeo.cms.util.CurrentSubject;
 import org.osgi.service.useradmin.Role;
 
@@ -195,6 +196,23 @@ public class ContentUtils {
                }
        }
 
+       /**
+        * Constructs a relative path between a base path and a given path.
+        * 
+        * @throws IllegalArgumentException if the base path is not an ancestor of the
+        *                                  path
+        */
+       public static String relativize(String basePath, String path) throws IllegalArgumentException {
+               Objects.requireNonNull(basePath);
+               Objects.requireNonNull(path);
+               if (!path.startsWith(basePath))
+                       throw new IllegalArgumentException(basePath + " is not an ancestor of " + path);
+               String relativePath = path.substring(basePath.length());
+               if (relativePath.length() > 0 && relativePath.charAt(0) == '/')
+                       relativePath = relativePath.substring(1);
+               return relativePath;
+       }
+
        /** Singleton. */
        private ContentUtils() {