org.apache.zookeeper.server.util.VerifyingFileFactory Maven / Gradle / Ivy
/*
* 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.zookeeper.server.util;
import java.io.File;
import org.slf4j.Logger;
public final class VerifyingFileFactory {
private final boolean warnForRelativePath;
private final boolean failForNonExistingPath;
private final Logger log;
public VerifyingFileFactory(Builder builder) {
warnForRelativePath = builder.warnForRelativePathOption;
failForNonExistingPath = builder.failForNonExistingPathOption;
log = builder.log;
assert (log != null);
}
public File create(String path) {
File file = new File(path);
return validate(file);
}
public File validate(File file) {
if (warnForRelativePath) {
doWarnForRelativePath(file);
}
if (failForNonExistingPath) {
doFailForNonExistingPath(file);
}
return file;
}
private void doFailForNonExistingPath(File file) {
if (!file.exists()) {
throw new IllegalArgumentException(file.toString() + " file is missing");
}
}
private void doWarnForRelativePath(File file) {
if (file.isAbsolute()) {
return;
}
if (file.getPath().substring(0, 2).equals("." + File.separator)) {
return;
}
log.warn(file.getPath() + " is relative. Prepend ." + File.separator + " to indicate that you're sure!");
}
public static class Builder {
private boolean warnForRelativePathOption = false;
private boolean failForNonExistingPathOption = false;
private final Logger log;
public Builder(Logger log) {
this.log = log;
}
public Builder warnForRelativePath() {
warnForRelativePathOption = true;
return this;
}
public Builder failForNonExistingPath() {
failForNonExistingPathOption = true;
return this;
}
public VerifyingFileFactory build() {
return new VerifyingFileFactory(this);
}
}
}