/**
* 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.metamodel.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
/**
* An entirely in-memory kept {@link Resource}.
*/
public class InMemoryResource extends AbstractResource implements Serializable {
private static final long serialVersionUID = 1L;
private final String _path;
private byte[] _contents;
private long _lastModified;
/**
* Constructs a new {@link InMemoryResource} with a path/name
*
* @param path
*/
public InMemoryResource(String path) {
this(path, new byte[0], -1);
}
/**
* Constructs a new {@link InMemoryResource} with a path/name and some
* initial contents.
*
* @param path
* @param contents
* @param lastModified
*/
public InMemoryResource(String path, byte[] contents, long lastModified) {
_path = path;
_contents = contents;
_lastModified = lastModified;
}
@Override
public String toString() {
return "InMemoryResource[" + _path + "]";
}
@Override
public String getName() {
String name = _path;
final int lastSlash = name.lastIndexOf('/');
final int lastBackSlash = name.lastIndexOf('\\');
final int lastIndex = Math.max(lastSlash, lastBackSlash);
if (lastIndex != -1) {
final String lastPart = name.substring(lastIndex + 1);
if (!"".equals(lastPart)) {
return lastPart;
}
}
return name;
}
@Override
public String getQualifiedPath() {
return _path;
}
/**
* Gets the path of this resource
*
* @return
*/
public String getPath() {
return _path;
}
@Override
public boolean isReadOnly() {
return false;
}
@Override
public boolean isExists() {
return true;
}
@Override
public long getSize() {
return _contents.length;
}
@Override
public long getLastModified() {
return _lastModified;
}
@Override
public OutputStream write() throws ResourceException {
return createOutputStream(false);
}
@Override
public OutputStream append() throws ResourceException {
return createOutputStream(true);
}
private OutputStream createOutputStream(boolean append) throws ResourceException {
ByteArrayOutputStream out = new ByteArrayOutputStream() {
@Override
public void flush() throws IOException {
super.flush();
_contents = toByteArray();
_lastModified = System.currentTimeMillis();
}
};
if (append) {
try {
out.write(_contents);
} catch (IOException e) {
throw new ResourceException(this, e);
}
}
return out;
}
@Override
public InputStream read() throws ResourceException {
return new ByteArrayInputStream(_contents);
}
}