Examples of java.security.Permission

java.security.Permission
Abstract class for representing access to a system resource. All permissions have a name (whose interpretation depends on the subclass), as well as abstract functions for defining the semantics of the particular Permission subclass.
Most Permission objects also include an "actions" list that tells the actions that are permitted for the object. For example, for a java.io.FilePermission object, the permission name is the pathname of a file (or directory), and the actions list (such as "read, write") specifies which actions are granted for the specified file (or for files in the specified directory). The actions list is optional for Permission objects, such as java.lang.RuntimePermission, that don't need such a list; you either have the named permission (such as "system.exit") or you don't.
An important method that must be implemented by each subclass is the implies method to compare Permissions. Basically, "permission p1 implies permission p2" means that if one is granted permission p1, one is naturally granted permission p2. Thus, this is not an equality test, but rather more of a subset test.
Permission objects are similar to String objects in that they are immutable once they have been created. Subclasses should not provide methods that can change the state of a permission once it has been created. @see Permissions @see PermissionCollection @version 1.40 05/11/17 @author Marianne Mueller @author Roland Schemers

        if (path == null) {
            return;
        }


        if (securityManager != null) {
            Permission permission = null;
            if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
                if (!path.endsWith("/")) {
                    path = path + "/";
                }
                permission = new JndiPermission(path + "*");

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        if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {
            pc = super.getPermissions(codeSource);
            if (pc != null) {
                Iterator perms = permissionList.iterator();
                while (perms.hasNext()) {
                    Permission p = (Permission)perms.next();
                    pc.add(p);
                }
                loaderPC.put(codeUrl,pc);
            }
        }

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                p instanceof java.net.SocketPermission);
        assertTrue("Permission has wrong name: " + p.getName(), p.getName()
                .contains("localhost:" + port));


        URL fileUrl = new URL("file:myfile");
        Permission perm = new FilePermission("myfile", "read");
        Permission result = fileUrl.openConnection().getPermission();
        assertTrue("Wrong file: permission 1:" + perm + " , " + result, result
                .equals(perm));


        fileUrl = new URL("file:/myfile/");
        perm = new FilePermission("/myfile", "read");
        result = fileUrl.openConnection().getPermission();
        assertTrue("Wrong file: permission 2:" + perm + " , " + result, result
                .equals(perm));


        fileUrl = new URL("file:///host/volume/file");
        perm = new FilePermission("/host/volume/file", "read");
        result = fileUrl.openConnection().getPermission();
        assertTrue("Wrong file: permission 3:" + perm + " , " + result, result
                .equals(perm));


        URL httpUrl = new URL("http://home/myfile/");
        assertTrue("Wrong http: permission", httpUrl.openConnection()
                .getPermission().equals(
                        new SocketPermission("home:80", "connect")));
        httpUrl = new URL("http://home2:8080/myfile/");
        assertTrue("Wrong http: permission", httpUrl.openConnection()
                .getPermission().equals(
                        new SocketPermission("home2:8080", "connect")));
        URL ftpUrl = new URL("ftp://home/myfile/");
        assertTrue("Wrong ftp: permission", ftpUrl.openConnection()
                .getPermission().equals(
                        new SocketPermission("home:21", "connect")));
        ftpUrl = new URL("ftp://home2:22/myfile/");
        assertTrue("Wrong ftp: permission", ftpUrl.openConnection()
                .getPermission().equals(
                        new SocketPermission("home2:22", "connect")));


        URL jarUrl = new URL("jar:file:myfile!/");
        perm = new FilePermission("myfile", "read");
        result = jarUrl.openConnection().getPermission();
        assertTrue("Wrong jar: permission:" + perm + " , " + result, result
                .equals(new FilePermission("myfile", "read")));
    }

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        }


        String path = filepath;


        if (securityManager != null) {
            Permission permission = null;
            if (path.startsWith("jndi:") || path.startsWith("jar:jndi:")) {
                if (!path.endsWith("/")) {
                    path = path + "/";
                }
                permission = new JndiPermission(path + "*");

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        if ((pc = loaderPC.get(codeUrl)) == null) {
            pc = super.getPermissions(codeSource);
            if (pc != null) {
                Iterator<Permission> perms = permissionList.iterator();
                while (perms.hasNext()) {
                    Permission p = perms.next();
                    pc.add(p);
                }
                loaderPC.put(codeUrl,pc);
            }
        }

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        if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {
            pc = super.getPermissions(codeSource);
            if (pc != null) {
                Iterator perms = permissionList.iterator();
                while (perms.hasNext()) {
                    Permission p = (Permission)perms.next();
                    pc.add(p);
                }
                loaderPC.put(codeUrl,pc);
            }
        }

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        if (path == null) {
            return;
        }


        if (securityManager != null) {
            Permission permission = null;
            if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
                if (!path.endsWith("/")) {
                    path = path + "/";
                }
                permission = new JndiPermission(path + "*");

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        if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {
            pc = super.getPermissions(codeSource);
            if (pc != null) {
                Iterator perms = permissionList.iterator();
                while (perms.hasNext()) {
                    Permission p = (Permission)perms.next();
                    pc.add(p);
                }
                loaderPC.put(codeUrl,pc);
            }
        }

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        if (path == null) {
            return;
        }


        if (securityManager != null) {
            Permission permission = null;
            if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
                if (!path.endsWith("/")) {
                    path = path + "/";
                }
                permission = new JndiPermission(path + "*");

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        if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {
            pc = super.getPermissions(codeSource);
            if (pc != null) {
                Iterator perms = permissionList.iterator();
                while (perms.hasNext()) {
                    Permission p = (Permission)perms.next();
                    pc.add(p);
                }
                loaderPC.put(codeUrl,pc);
            }
        }

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