ToStringUtil.java
- /**
- *
- * Copyright 2019 Florian Schmaus
- *
- * 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.jivesoftware.smack.util;
- import java.util.ArrayList;
- import java.util.Collection;
- import java.util.List;
- public class ToStringUtil {
- public static Builder builderFor(Class<?> clazz) {
- StringBuilder sb = new StringBuilder();
- sb.append(clazz.getSimpleName()).append('(');
- return new Builder(sb);
- }
- public static final class Builder {
- private final StringBuilder sb;
- private Builder(StringBuilder sb) {
- this.sb = sb;
- }
- public Builder addValue(String name, Object value) {
- if (value == null) {
- return this;
- }
- if (sb.charAt(sb.length() - 1) != '(') {
- sb.append(' ');
- }
- sb.append(name).append("='").append(value).append('\'');
- return this;
- }
- public <V> Builder add(String name, Collection<? extends V> values, Function<?, V> toStringFunction) {
- if (values.isEmpty()) {
- return this;
- }
- sb.append(' ').append(name).append('[');
- List<String> stringValues = new ArrayList<>(values.size());
- for (V value : values) {
- String valueString = toStringFunction.apply(value).toString();
- stringValues.add(valueString);
- }
- StringUtils.appendTo(stringValues, ", ", sb);
- sb.append(']');
- return this;
- }
- public String build() {
- sb.append(')');
- return sb.toString();
- }
- }
- }