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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common;
import com.carrotsearch.hppc.ObjectObjectAssociativeContainer;
import com.carrotsearch.hppc.ObjectObjectHashMap;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
*
*/
public class ContextAndHeaderHolder implements HasContextAndHeaders {
private ObjectObjectHashMap<Object, Object> context;
protected Map<String, Object> headers;
@SuppressWarnings("unchecked")
@Override
public final synchronized <V> V putInContext(Object key, Object value) {
if (context == null) {
context = new ObjectObjectHashMap<>(2);
}
return (V) context.put(key, value);
}
@Override
public final synchronized void putAllInContext(ObjectObjectAssociativeContainer<Object, Object> map) {
if (map == null) {
return;
}
if (context == null) {
context = new ObjectObjectHashMap<>(map);
} else {
context.putAll(map);
}
}
@SuppressWarnings("unchecked")
@Override
public final synchronized <V> V getFromContext(Object key) {
return context != null ? (V) context.get(key) : null;
}
@SuppressWarnings("unchecked")
@Override
public final synchronized <V> V getFromContext(Object key, V defaultValue) {
V value = getFromContext(key);
return value == null ? defaultValue : value;
}
@Override
public final synchronized boolean hasInContext(Object key) {
return context != null && context.containsKey(key);
}
@Override
public final synchronized int contextSize() {
return context != null ? context.size() : 0;
}
@Override
public final synchronized boolean isContextEmpty() {
return context == null || context.isEmpty();
}
@Override
public synchronized ImmutableOpenMap<Object, Object> getContext() {
return context != null ? ImmutableOpenMap.copyOf(context) : ImmutableOpenMap.of();
}
@Override
public synchronized void copyContextFrom(HasContext other) {
if (other == null) {
return;
}
synchronized (other) {
ImmutableOpenMap<Object, Object> otherContext = other.getContext();
if (otherContext == null) {
return;
}
if (context == null) {
ObjectObjectHashMap<Object, Object> map = new ObjectObjectHashMap<>(other.getContext().size());
map.putAll(otherContext);
this.context = map;
} else {
context.putAll(otherContext);
}
}
}
@SuppressWarnings("unchecked")
@Override
public final void putHeader(String key, Object value) {
if (headers == null) {
headers = new HashMap<>();
}
headers.put(key, value);
}
@SuppressWarnings("unchecked")
@Override
public final <V> V getHeader(String key) {
return headers != null ? (V) headers.get(key) : null;
}
@Override
public final boolean hasHeader(String key) {
return headers != null && headers.containsKey(key);
}
@Override
public Set<String> getHeaders() {
return headers != null ? headers.keySet() : Collections.<String>emptySet();
}
@Override
public void copyHeadersFrom(HasHeaders from) {
if (from != null && from.getHeaders() != null && !from.getHeaders().isEmpty()) {
for (String headerName : from.getHeaders()) {
putHeader(headerName, from.getHeader(headerName));
}
}
}
@Override
public void copyContextAndHeadersFrom(HasContextAndHeaders other) {
copyContextFrom(other);
copyHeadersFrom(other);
}
}
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