/**
* 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.camel.component.file;
import java.util.Comparator;
import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.spi.Language;
import org.apache.camel.util.ObjectHelper;
/**
* Default file sorter.
*/
public final class GenericFileDefaultSorter {
private GenericFileDefaultSorter() {
}
/**
* Returns a new sort by name
*/
public static Comparator<GenericFile<?>> sortByName(final boolean reverse) {
return new Comparator<GenericFile<?>>() {
public int compare(GenericFile<?> o1, GenericFile<?> o2) {
int answer = o1.getFileName().compareTo(o2.getFileName());
return reverse ? -1 * answer : answer;
}
};
}
/**
* Returns a new sort by path name
*/
public static Comparator<GenericFile<?>> sortByPathName(final boolean reverse) {
return new Comparator<GenericFile<?>>() {
public int compare(GenericFile<?> o1, GenericFile<?> o2) {
int answer = o1.getParent().compareTo(o2.getParent());
return reverse ? -1 * answer : answer;
}
};
}
/**
* Returns a new sort by last modified (newest first)
*/
public static Comparator<GenericFile<?>> sortByLastModified(
final boolean reverse) {
return new Comparator<GenericFile<?>>() {
public int compare(GenericFile<?> o1, GenericFile<?> o2) {
long delta = o1.getLastModified() - o2.getLastModified();
if (delta == 0) {
return 0;
}
int answer = delta > 0 ? 1 : -1;
return reverse ? -1 * answer : answer;
}
};
}
/**
* Returns a new sort by file size (smallest first)
*/
public static Comparator<GenericFile<?>> sortBySize(final boolean reverse) {
return new Comparator<GenericFile<?>>() {
public int compare(GenericFile<?> o1, GenericFile<?> o2) {
long delta = o1.getFileLength() - o2.getFileLength();
if (delta == 0) {
return 0;
}
int answer = delta > 0 ? 1 : -1;
return reverse ? -1 * answer : answer;
}
};
}
/**
* Returns a new sory by file language expression
*
* @param context the camel context
* @param expression the file language expression
* @param reverse true to reverse order
* @return the comparator
*/
public static Comparator<Exchange> sortByFileLanguage(
CamelContext context, String expression, boolean reverse) {
return sortByFileLanguage(context, expression, reverse, false, null);
}
/**
* Returns a new sory by file language expression
*
* @param context the camel context
* @param expression the file language expression
* @param reverse true to reverse order
* @param ignoreCase ignore case if comparing strings
* @return the comparator
*/
public static Comparator<Exchange> sortByFileLanguage(
CamelContext context, String expression, boolean reverse, boolean ignoreCase) {
return sortByFileLanguage(context, expression, reverse, ignoreCase, null);
}
/**
* Returns a new sort by file language expression
*
* @param context the camel context
* @param expression the file language expression
* @param reverse true to reverse order
* @param ignoreCase ignore case if comparing strings
* @param nested nested comparator for sub group sorting, can be null
* @return the comparator
*/
public static Comparator<Exchange> sortByFileLanguage(
final CamelContext context, final String expression, final boolean reverse,
final boolean ignoreCase, final Comparator<Exchange> nested) {
return new Comparator<Exchange>() {
public int compare(Exchange o1, Exchange o2) {
Language language = context.resolveLanguage("file");
final Expression exp = language.createExpression(expression);
Object result1 = exp.evaluate(o1, Object.class);
Object result2 = exp.evaluate(o2, Object.class);
int answer = ObjectHelper.compare(result1, result2, ignoreCase);
// if equal then sub sort by nested comparator
if (answer == 0 && nested != null) {
answer = nested.compare(o1, o2);
}
return reverse ? -1 * answer : answer;
}
public String toString() {
return expression + (nested != null ? ";" + nested.toString() : "");
}
};
}
}
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