001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.vfs2.operations; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import org.apache.commons.vfs2.FileObject; 023import org.apache.commons.vfs2.FileSystemException; 024import org.apache.commons.vfs2.FileSystemManager; 025 026/** 027 * 028 * @since 0.1 029 */ 030public class DefaultFileOperations implements FileOperations { 031 /** 032 */ 033 private final FileSystemManager fsmanager; 034 035 /** 036 */ 037 private final FileObject fileObject; 038 039 /** 040 * 041 * @param file The file. 042 */ 043 public DefaultFileOperations(final FileObject file) { 044 fileObject = file; 045 046 fsmanager = file.getFileSystem().getFileSystemManager(); 047 } 048 049 /** 050 * @return The operation classes. 051 * @throws FileSystemException If an error occurs. 052 */ 053 @Override 054 public Class<? extends FileOperation>[] getOperations() throws FileSystemException { 055 056 final String scheme = fileObject.getURL().getProtocol(); 057 final FileOperationProvider[] providers = fsmanager.getOperationProviders(scheme); 058 059 if (providers == null) { 060 return null; 061 } 062 063 final List<Class<? extends FileOperation>> operations = new ArrayList<>(); 064 065 for (final FileOperationProvider provider : providers) { 066 provider.collectOperations(operations, fileObject); 067 } 068 069 @SuppressWarnings("unchecked") 070 final Class<? extends FileOperation>[] array = (Class<? extends FileOperation>[]) operations 071 .toArray(new Class<?>[] {}); 072 return array; 073 } 074 075 /** 076 * @param operationClass The Class that performs the operation. 077 * @return The FileOperation. 078 * @throws FileSystemException if an error occurs. 079 */ 080 @Override 081 public FileOperation getOperation(final Class<? extends FileOperation> operationClass) throws FileSystemException { 082 083 final String scheme = fileObject.getURL().getProtocol(); 084 final FileOperationProvider[] providers = fsmanager.getOperationProviders(scheme); 085 086 if (providers == null) { 087 throw new FileSystemException("vfs.operation/operation-not-supported.error", operationClass); 088 } 089 090 FileOperation resultOperation = null; 091 092 for (final FileOperationProvider provider : providers) { 093 resultOperation = provider.getOperation(fileObject, operationClass); 094 095 if (resultOperation != null) { 096 break; 097 } 098 } 099 100 if (resultOperation == null) { 101 throw new FileSystemException("vfs.operation/operation-not-supported.error", operationClass); 102 } 103 104 return resultOperation; 105 } 106 107 /** 108 * @param operationClass the operation's class. 109 * @return true if the operation of specified class is supported for current FileObject and false otherwise. 110 * 111 * @throws FileSystemException if an error occurs. 112 */ 113 @Override 114 public boolean hasOperation(final Class<? extends FileOperation> operationClass) throws FileSystemException { 115 final Class<? extends FileOperation>[] operations = getOperations(); 116 if (operations == null) { 117 return false; 118 } 119 120 for (final Class<? extends FileOperation> operation : operations) { 121 if (operationClass.isAssignableFrom(operation)) { 122 return true; 123 } 124 } 125 return false; 126 } 127}