76 lines
2.1 KiB
Java
76 lines
2.1 KiB
Java
/**
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*
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* Copyright 2019 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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public class ToStringUtil {
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public static Builder builderFor(Class<?> clazz) {
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StringBuilder sb = new StringBuilder();
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sb.append(clazz.getSimpleName()).append('(');
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return new Builder(sb);
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}
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public static final class Builder {
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private final StringBuilder sb;
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private Builder(StringBuilder sb) {
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this.sb = sb;
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}
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public Builder addValue(String name, Object value) {
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if (value == null) {
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return this;
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}
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if (sb.charAt(sb.length() - 1) != '(') {
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sb.append(' ');
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}
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sb.append(name).append("='").append(value).append('\'');
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return this;
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}
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public <V> Builder add(String name, Collection<? extends V> values, Function<?, V> toStringFunction) {
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if (values.isEmpty()) {
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return this;
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}
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sb.append(' ').append(name).append('[');
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List<String> stringValues = new ArrayList<>(values.size());
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for (V value : values) {
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String valueString = toStringFunction.apply(value).toString();
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stringValues.add(valueString);
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}
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StringUtils.appendTo(stringValues, ", ", sb);
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sb.append(']');
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return this;
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}
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public String build() {
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sb.append(')');
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return sb.toString();
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}
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}
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}
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