com.google.inject.internal.util.ToStringBuilder Maven / Gradle / Ivy
/**
* Copyright (C) 2006 Google Inc.
*
* 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 com.google.inject.internal.util;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* Helps with {@code toString()} methods.
*
* @author [email protected] (Bob Lee)
*/
public class ToStringBuilder {
// Linked hash map ensures ordering.
final Map map = new LinkedHashMap();
final String name;
public ToStringBuilder(Class type) {
this.name = type.getSimpleName();
}
public ToStringBuilder add(String name, Object value) {
if (map.put(name, value) != null) {
throw new RuntimeException("Duplicate names: " + name);
}
return this;
}
@Override public String toString() {
return name + map.toString().replace('{', '[').replace('}', ']');
}
}