jetbrick.web.mvc.action.PathVariables Maven / Gradle / Ivy
/**
* Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
*
* Email: [email protected]
* URL: http://subchen.github.io/
*
* 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 jetbrick.web.mvc.action;
import java.util.*;
/**
* 为了优化性能，没有使用 Map，而是自己实现的容器.
*/
public final class PathVariables {
private String[] items;
private int size;
public PathVariables() {
this.items = new String[16];
this.size = 0;
}
public void add(String name, String value) {
if (items.length - size < 2) {
items = Arrays.copyOf(items, items.length + 16);
}
items[size] = name;
items[size + 1] = value;
size += 2;
}
public void clear() {
// 没有必要将 items 的内容设置为 null，设置 size 就可以了.
size = 0;
}
public String getValue(String name) {
for (int i = 0; i < size; i += 2) {
if (items[i].equals(name)) {
return items[i + 1];
}
}
return null;
}
// 返回最终的 map
public Map map() {
Map map = new HashMap();
int i = 0;
while (i < size) {
map.put(items[i], items[i + 1]);
i += 2;
}
return map;
}
}