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The Apache Log4j Implementation
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.logging.log4j.core.util;
import java.util.Objects;
import org.apache.logging.log4j.core.config.Node;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;
/**
* Key/Value pair configuration item.
*
* @since 2.1 implements {@link #hashCode()} and {@link #equals(Object)}
*/
@Plugin(name = "KeyValuePair", category = Node.CATEGORY, printObject = true)
public final class KeyValuePair {
/**
* The empty array.
*/
public static final KeyValuePair[] EMPTY_ARRAY = {};
private final String key;
private final String value;
/**
* Constructs a key/value pair. The constructor should only be called from test classes.
* @param key The key.
* @param value The value.
*/
public KeyValuePair(final String key, final String value) {
this.key = key;
this.value = value;
}
/**
* Returns the key.
* @return the key.
*/
public String getKey() {
return key;
}
/**
* Returns the value.
* @return The value.
*/
public String getValue() {
return value;
}
@Override
public String toString() {
return key + '=' + value;
}
@PluginBuilderFactory
public static Builder newBuilder() {
return new Builder();
}
public static class Builder implements org.apache.logging.log4j.core.util.Builder {
@PluginBuilderAttribute
private String key;
@PluginBuilderAttribute
private String value;
public Builder setKey(final String aKey) {
this.key = aKey;
return this;
}
public Builder setValue(final String aValue) {
this.value = aValue;
return this;
}
@Override
public KeyValuePair build() {
return new KeyValuePair(key, value);
}
}
@Override
public int hashCode() {
return Objects.hash(key, value);
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final KeyValuePair other = (KeyValuePair) obj;
if (!Objects.equals(key, other.key)) {
return false;
}
if (!Objects.equals(value, other.value)) {
return false;
}
return true;
}
}