| /* |
| * 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.vfs2.provider.ram; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.commons.vfs2.FileName; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileType; |
| |
| /** |
| * RAM File Object Data. |
| */ |
| class RamFileData implements Serializable { |
| |
| static final byte[] EMPTY = new byte[0]; |
| |
| /** |
| * serialVersionUID format is YYYYMMDD for the date of the last binary change. |
| */ |
| private static final long serialVersionUID = 20101208L; |
| |
| /** |
| * File Name. |
| */ |
| private FileName name; |
| |
| /** |
| * File Type. |
| */ |
| private FileType type; |
| |
| /** |
| * Bytes. |
| */ |
| private byte[] content; |
| |
| /** |
| * Last modified time |
| */ |
| private long lastModified; |
| |
| /** |
| * Children |
| */ |
| private final Collection<RamFileData> children; |
| |
| /** |
| * Constructor. |
| * |
| * @param name The file name. |
| */ |
| public RamFileData(final FileName name) { |
| this.children = Collections.synchronizedCollection(new ArrayList<RamFileData>()); |
| this.clear(); |
| if (name == null) { |
| throw new IllegalArgumentException("name can not be null"); |
| } |
| this.name = name; |
| } |
| |
| /** |
| * @return Returns the buffer. |
| */ |
| byte[] getContent() { |
| return content; |
| } |
| |
| /** |
| * @param content The buffer. |
| */ |
| void setContent(final byte[] content) { |
| updateLastModified(); |
| this.content = content; |
| } |
| |
| /** |
| * @return Returns the lastModified. |
| */ |
| long getLastModified() { |
| return lastModified; |
| } |
| |
| /** |
| * @param lastModified The lastModified to set. |
| */ |
| void setLastModified(final long lastModified) { |
| this.lastModified = lastModified; |
| } |
| |
| /** |
| * @return Returns the type. |
| */ |
| FileType getType() { |
| return type; |
| } |
| |
| /** |
| * @param type The type to set. |
| */ |
| void setType(final FileType type) { |
| this.type = type; |
| } |
| |
| /** |
| */ |
| void clear() { |
| this.content = EMPTY; |
| 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() |
| */ |
| @Override |
| public String toString() { |
| return this.name.toString(); |
| } |
| |
| /** |
| * Add a child. |
| * |
| * @param data The file data. |
| * @throws FileSystemException if an error occurs. |
| */ |
| void addChild(final RamFileData data) throws FileSystemException { |
| if (!this.getType().hasChildren()) { |
| throw new FileSystemException("A child can only be added in a folder"); |
| } |
| |
| FileSystemException.requireNonNull(data, "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(final 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<RamFileData> getChildren() { |
| if (name == null) { |
| throw new IllegalStateException("Data is clear"); |
| } |
| return children; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(final Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (!(o instanceof RamFileData)) { |
| return false; |
| } |
| final RamFileData data = (RamFileData) o; |
| return this.getName().equals(data.getName()); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| return this.getName().hashCode(); |
| } |
| |
| boolean hasChildren(final RamFileData data) { |
| return this.children.contains(data); |
| } |
| |
| /** |
| * @return Returns the size of the buffer |
| */ |
| int size() { |
| return content.length; |
| } |
| |
| /** |
| * Resize the buffer |
| * |
| * @param newSize The new buffer size. |
| */ |
| void resize(final long newSize) { |
| // A future implementation may allow longs/multiple buffer/and so on |
| if (newSize > Integer.MAX_VALUE) { |
| throw new IllegalArgumentException( |
| String.format("newSize(%d) > Integer.MAX_VALUE(%d)", newSize, Integer.MAX_VALUE)); |
| } |
| final int resize = (int) newSize; |
| final int size = this.size(); |
| final byte[] newBuf = new byte[resize]; |
| System.arraycopy(this.content, 0, newBuf, 0, Math.min(resize, size)); |
| this.content = newBuf; |
| updateLastModified(); |
| } |
| |
| } |