| /* |
| * 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.commons.vfs.provider.ram; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.commons.vfs.FileName; |
| import org.apache.commons.vfs.FileSystemException; |
| import org.apache.commons.vfs.FileType; |
| |
| /** |
| * RAM File Object Data. |
| * @author <a href="http://commons.apache.org/vfs/team-list.html">Commons VFS team</a> |
| */ |
| class RamFileData implements Serializable |
| { |
| /** |
| * File Name. |
| */ |
| private FileName name; |
| |
| /** |
| * File Type. |
| */ |
| private FileType type; |
| |
| /** |
| * Bytes. |
| */ |
| private byte[] buffer; |
| |
| /** |
| * Last modified time |
| */ |
| private long lastModified; |
| |
| /** |
| * Children |
| */ |
| private final Collection children; |
| |
| /** |
| * Constructor. |
| * @param name The file name. |
| */ |
| public RamFileData(FileName name) |
| { |
| super(); |
| this.children = Collections.synchronizedCollection(new ArrayList()); |
| this.clear(); |
| if (name == null) |
| { |
| throw new IllegalArgumentException("name can not be null"); |
| } |
| this.name = name; |
| } |
| |
| /** |
| * @return Returns the buffer. |
| */ |
| byte[] getBuffer() |
| { |
| return buffer; |
| } |
| |
| /** |
| * @param buffer The buffer. |
| */ |
| void setBuffer(byte[] buffer) |
| { |
| updateLastModified(); |
| this.buffer = buffer; |
| } |
| |
| /** |
| * @return Returns the lastModified. |
| */ |
| long getLastModified() |
| { |
| return lastModified; |
| } |
| |
| /** |
| * @param lastModified |
| * The lastModified to set. |
| */ |
| void setLastModified(long lastModified) |
| { |
| this.lastModified = lastModified; |
| } |
| |
| /** |
| * @return Returns the type. |
| */ |
| FileType getType() |
| { |
| return type; |
| } |
| |
| /** |
| * @param type |
| * The type to set. |
| */ |
| void setType(FileType type) |
| { |
| this.type = type; |
| } |
| |
| /** |
| * |
| */ |
| void clear() |
| { |
| this.buffer = new byte[0]; |
| updateLastModified(); |
| this.type = FileType.IMAGINARY; |
| this.children.clear(); |
| this.name = null; |
| } |
| |
| void updateLastModified() |
| { |
| this.lastModified = System.currentTimeMillis(); |
| } |
| |
| /** |
| * @return Returns the name. |
| */ |
| FileName getName() |
| { |
| return name; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() |
| { |
| return this.name.toString(); |
| } |
| |
| /** |
| * Add a child. |
| * |
| * @param data The file data. |
| * @throws FileSystemException if an error occurs. |
| */ |
| void addChild(RamFileData data) throws FileSystemException |
| { |
| if (!this.getType().hasChildren()) |
| { |
| throw new FileSystemException( |
| "A child can only be added in a folder"); |
| } |
| |
| if (data == null) |
| { |
| throw new FileSystemException("No child can be null"); |
| } |
| |
| if (this.children.contains(data)) |
| { |
| throw new FileSystemException("Child already exists. " + data); |
| } |
| |
| this.children.add(data); |
| updateLastModified(); |
| } |
| |
| /** |
| * Remove a child. |
| * |
| * @param data The file data. |
| * @throws FileSystemException if an error occurs. |
| */ |
| void removeChild(RamFileData data) throws FileSystemException |
| { |
| if (!this.getType().hasChildren()) |
| { |
| throw new FileSystemException( |
| "A child can only be removed from a folder"); |
| } |
| if (!this.children.contains(data)) |
| { |
| throw new FileSystemException("Child not found. " + data); |
| } |
| this.children.remove(data); |
| updateLastModified(); |
| } |
| |
| /** |
| * @return Returns the children. |
| */ |
| Collection getChildren() |
| { |
| if (name == null) |
| { |
| throw new IllegalStateException("Data is clear"); |
| } |
| return children; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| public boolean equals(Object o) |
| { |
| if (this == o) |
| { |
| return true; |
| } |
| if (!(o instanceof RamFileData)) |
| { |
| return false; |
| } |
| RamFileData data = (RamFileData) o; |
| return this.getName().equals(data.getName()); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| public int hashCode() |
| { |
| return this.getName().hashCode(); |
| } |
| |
| boolean hasChildren(RamFileData data) |
| { |
| return this.children.contains(data); |
| } |
| |
| /** |
| * @return Returns the size of the buffer |
| */ |
| int size() |
| { |
| return buffer.length; |
| } |
| |
| /** |
| * Resize the buffer |
| * |
| * @param newSize The new buffer size. |
| */ |
| void resize(int newSize) |
| { |
| int size = this.size(); |
| byte[] newBuf = new byte[newSize]; |
| System.arraycopy(this.buffer, 0, newBuf, 0, size); |
| this.buffer = newBuf; |
| updateLastModified(); |
| } |
| |
| } |