/*****************************************************************
* 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.cayenne.modeler.util.path;
import java.io.File;
public class LongPathTrimmer implements PathTrimmer {
private static final String PATH_SEPARATOR = File.separator;
private static final int PATH_LENGTH_THRESHOLD = 8;
private String[] splitPath(String path) {
return path.split(PATH_SEPARATOR);
}
private String joinPath(String[] components) {
if(components.length == 0) {
return "";
}
StringBuilder sb = new StringBuilder(components[0]);
for(int i=1; i<components.length; i++) {
sb.append(PATH_SEPARATOR);
sb.append(components[i]);
}
return sb.toString();
}
@Override
public String trim(String path) {
String[] components = splitPath(path);
if(components.length <= PATH_LENGTH_THRESHOLD + 1) {
return path;
}
String[] strippedComponents = new String[PATH_LENGTH_THRESHOLD + 1];
int half = PATH_LENGTH_THRESHOLD / 2;
int end = components.length - half;
int idx = 0;
boolean trimAdded = false;
for(int i=0; i<components.length; i++) {
if(i < half || i >= end) {
strippedComponents[idx++] = components[i];
} else if(!trimAdded) {
strippedComponents[idx++] = "...";
trimAdded = true;
}
}
return joinPath(strippedComponents);
}
}