/*
* Copyright 2013-2014 the original author or authors.
*
* Licensed 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.springframework.data.rest.core;
import java.util.regex.Pattern;
import org.springframework.util.StringUtils;
/**
* Simple value object to build up (URI) paths. Allows easy concatenation of {@link String}s and will take care of
* removal of whitespace and reducing slashes to single ones.
*
* @author Oliver Gierke
*/
public class Path {
private static final String SLASH = "/";
private static final String MATCH_PATTERN = "/?%s";
private final String path;
/**
* Creates a new {@link Path} from the given {@link String}.
*
* @param path
*/
public Path(String path) {
this(path, true);
}
/**
* Creates a new {@link Path} from the given string and potentially bypasses the cleanup.
*
* @param path
* @param cleanUp
*/
private Path(String path, boolean cleanUp) {
this.path = cleanUp ? cleanUp(path) : path;
}
/**
* Returns whether the given reference String matches the current {@link Path}.
*
* @param reference
* @return
*/
public boolean matches(String reference) {
return reference == null ? false : this.path.matches(String.format(MATCH_PATTERN, Pattern.quote(reference)));
}
/**
* Appends the given {@link String} to the current {@link Path}.
*
* @param path
* @return
*/
public Path slash(String path) {
return new Path(this.path + cleanUp(path), false);
}
public Path slash(Path path) {
return slash(path.toString());
}
/*
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return path.hashCode();
}
private static String cleanUp(String path) {
if (!StringUtils.hasText(path)) {
return "";
}
String trimmed = path.trim().replaceAll(" ", "");
while (trimmed.endsWith("/")) {
trimmed = trimmed.substring(0, trimmed.length() - 1);
}
trimmed = trimmed.substring(getFirstNoneSlashIndex(trimmed));
return trimmed.contains("://") ? trimmed : SLASH + trimmed;
}
/*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return path;
}
/*
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof Path)) {
return false;
}
Path that = (Path) obj;
return this.path.equals(that.path);
}
private static int getFirstNoneSlashIndex(String input) {
for (int i = 0; i < input.length(); i++) {
if (input.charAt(i) != '/') {
return i;
}
}
return input.length();
}
}