/* * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.nio.fs; import java.nio.file.attribute.*;import java.util.*;import java.io.IOException; /** * An implementation of FileOwnerAttributeView that delegates to a given * PosixFileAttributeView or AclFileAttributeView object. */ final class FileOwnerAttributeViewImpl    implements FileOwnerAttributeView, DynamicFileAttributeView{    private static final String OWNER_NAME = "owner";     private final FileAttributeView view;    private final boolean isPosixView;     FileOwnerAttributeViewImpl(PosixFileAttributeView view) {        this.view = view;        this.isPosixView = true;    }     FileOwnerAttributeViewImpl(AclFileAttributeView view) {        this.view = view;        this.isPosixView = false;    }     @Override    public String name() {        return "owner";    }     @Override    public void setAttribute(String attribute, Object value)        throws IOException    {        if (attribute.equals(OWNER_NAME)) {            setOwner((UserPrincipal)value);        } else {            throw new IllegalArgumentException("'" + name() + ":" +                attribute + "' not recognized");        }    }     @Override    public Map<String,Object> readAttributes(String[] attributes) throws IOException {        Map<String,Object> result = new HashMap<>();        for (String attribute: attributes) {            if (attribute.equals("*") || attribute.equals(OWNER_NAME)) {                result.put(OWNER_NAME, getOwner());            } else {                throw new IllegalArgumentException("'" + name() + ":" +                    attribute + "' not recognized");            }        }        return result;    }     @Override    public UserPrincipal getOwner() throws IOException {        if (isPosixView) {            return ((PosixFileAttributeView)view).readAttributes().owner();        } else {            return ((AclFileAttributeView)view).getOwner();        }    }     @Override    public void setOwner(UserPrincipal owner)        throws IOException    {        if (isPosixView) {            ((PosixFileAttributeView)view).setOwner(owner);        } else {            ((AclFileAttributeView)view).setOwner(owner);        }    } }