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 * 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
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 * Unless required by applicable law or agreed to in writing,
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package org.apache.http.protocol;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;
import org.apache.http.util.Args;

Default implementation of HttpContext.

Please note instances of this class can be thread unsafe if the parent context is not thread safe.

Since:4.0
/** * Default implementation of {@link HttpContext}. * <p> * Please note instances of this class can be thread unsafe if the * parent context is not thread safe. * * @since 4.0 */
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL) public class BasicHttpContext implements HttpContext { private final HttpContext parentContext; private final Map<String, Object> map; public BasicHttpContext() { this(null); } public BasicHttpContext(final HttpContext parentContext) { super(); this.map = new ConcurrentHashMap<String, Object>(); this.parentContext = parentContext; } @Override public Object getAttribute(final String id) { Args.notNull(id, "Id"); Object obj = this.map.get(id); if (obj == null && this.parentContext != null) { obj = this.parentContext.getAttribute(id); } return obj; } @Override public void setAttribute(final String id, final Object obj) { Args.notNull(id, "Id"); if (obj != null) { this.map.put(id, obj); } else { this.map.remove(id); } } @Override public Object removeAttribute(final String id) { Args.notNull(id, "Id"); return this.map.remove(id); }
Since:4.2
/** * @since 4.2 */
public void clear() { this.map.clear(); } @Override public String toString() { return this.map.toString(); } }