org.springframework.boot.bind.DefaultPropertyNamePatternsMatcher Maven / Gradle / Ivy
/*
* Copyright 2012-2014 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.boot.bind;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* {@link PropertyNamePatternsMatcher} that matches when a property name exactly matches
* one of the given names, or starts with one of the given names followed by a delimiter.
* This implementation is optimized for frequent calls.
*
* @author Phillip Webb
* @since 1.2.0
*/
class DefaultPropertyNamePatternsMatcher implements PropertyNamePatternsMatcher {
private final char[] delimiters;
private final boolean ignoreCase;
private final String[] names;
protected DefaultPropertyNamePatternsMatcher(char[] delimiters, String... names) {
this(delimiters, false, names);
}
protected DefaultPropertyNamePatternsMatcher(char[] delimiters, boolean ignoreCase,
String... names) {
this(delimiters, ignoreCase, new HashSet(Arrays.asList(names)));
}
DefaultPropertyNamePatternsMatcher(char[] delimiters, boolean ignoreCase,
Set names) {
this.delimiters = delimiters;
this.ignoreCase = ignoreCase;
this.names = names.toArray(new String[names.size()]);
}
@Override
public boolean matches(String propertyName) {
char[] propertyNameChars = propertyName.toCharArray();
boolean[] match = new boolean[this.names.length];
boolean noneMatched = true;
for (int i = 0; i < this.names.length; i++) {
if (this.names[i].length() <= propertyNameChars.length) {
match[i] = true;
noneMatched = false;
}
}
if (noneMatched) {
return false;
}
for (int charIndex = 0; charIndex < propertyNameChars.length; charIndex++) {
for (int nameIndex = 0; nameIndex < this.names.length; nameIndex++) {
if (match[nameIndex]) {
match[nameIndex] = false;
if (charIndex < this.names[nameIndex].length()) {
if (isCharMatch(this.names[nameIndex].charAt(charIndex),
propertyNameChars[charIndex])) {
match[nameIndex] = true;
noneMatched = false;
}
}
else {
char charAfter = propertyNameChars[this.names[nameIndex]
.length()];
if (isDelimiter(charAfter)) {
match[nameIndex] = true;
noneMatched = false;
}
}
}
}
if (noneMatched) {
return false;
}
}
for (int i = 0; i < match.length; i++) {
if (match[i]) {
return true;
}
}
return false;
}
private boolean isCharMatch(char c1, char c2) {
if (this.ignoreCase) {
return Character.toLowerCase(c1) == Character.toLowerCase(c2);
}
return c1 == c2;
}
private boolean isDelimiter(char c) {
for (char delimiter : this.delimiters) {
if (c == delimiter) {
return true;
}
}
return false;
}
}