org.elasticsearch.common.xcontent.support.filtering.FilterPath Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.xcontent.support.filtering;
import org.elasticsearch.common.regex.Regex;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class FilterPath {
static final FilterPath EMPTY = new FilterPath();
private final String filter;
private final String segment;
private final FilterPath next;
private final boolean simpleWildcard;
private final boolean doubleWildcard;
protected FilterPath(String filter, String segment, FilterPath next) {
this.filter = filter;
this.segment = segment;
this.next = next;
this.simpleWildcard = (segment != null) && (segment.length() == 1) && (segment.charAt(0) == '*');
this.doubleWildcard = (segment != null) && (segment.length() == 2) && (segment.charAt(0) == '*') && (segment.charAt(1) == '*');
}
private FilterPath() {
this("", "", null);
}
public FilterPath matchProperty(String name) {
if ((next != null) && (simpleWildcard || doubleWildcard || Regex.simpleMatch(segment, name))) {
return next;
}
return null;
}
public boolean matches() {
return next == null;
}
boolean isDoubleWildcard() {
return doubleWildcard;
}
boolean isSimpleWildcard() {
return simpleWildcard;
}
String getSegment() {
return segment;
}
FilterPath getNext() {
return next;
}
public static FilterPath[] compile(Set filters) {
if (filters == null || filters.isEmpty()) {
return null;
}
List paths = new ArrayList<>();
for (String filter : filters) {
if (filter != null) {
filter = filter.trim();
if (filter.length() > 0) {
paths.add(parse(filter, filter));
}
}
}
return paths.toArray(new FilterPath[paths.size()]);
}
private static FilterPath parse(final String filter, final String segment) {
int end = segment.length();
for (int i = 0; i < end; ) {
char c = segment.charAt(i);
if (c == '.') {
String current = segment.substring(0, i).replaceAll("\\\\.", ".");
return new FilterPath(filter, current, parse(filter, segment.substring(i + 1)));
}
++i;
if ((c == '\\') && (i < end) && (segment.charAt(i) == '.')) {
++i;
}
}
return new FilterPath(filter, segment.replaceAll("\\\\.", "."), EMPTY);
}
@Override
public String toString() {
return "FilterPath [filter=" + filter + ", segment=" + segment + "]";
}
}