Spring Framework example source code file (HeaderValueHolder.java)

This example Spring Framework source code file (HeaderValueHolder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

header, headervalueholder, headervalueholder, iterator, linkedlist, linkedlist, list, list, object, string, string, util

The Spring Framework HeaderValueHolder.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * 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.springframework.mock.web;

import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;

/**
 * Internal helper class that serves as value holder for request headers.
 *
 * @author Juergen Hoeller
 * @author Rick Evans
 * @since 2.0.1
 */
class HeaderValueHolder {

	private final List values = new LinkedList();


	public void setValue(Object value) {
		this.values.clear();
		this.values.add(value);
	}

	public void addValue(Object value) {
		this.values.add(value);
	}

	public void addValues(Collection values) {
		this.values.addAll(values);
	}

	public void addValueArray(Object values) {
		CollectionUtils.mergeArrayIntoCollection(values, this.values);
	}

	public List getValues() {
		return Collections.unmodifiableList(this.values);
	}

	public Object getValue() {
		return (!this.values.isEmpty() ? this.values.get(0) : null);
	}


	/**
	 * Find a HeaderValueHolder by name, ignoring casing.
	 * @param headers the Map of header names to HeaderValueHolders
	 * @param name the name of the desired header
	 * @return the corresponding HeaderValueHolder,
	 * or <code>null if none found
	 */
	public static HeaderValueHolder getByName(Map headers, String name) {
		Assert.notNull(name, "Header name must not be null");
		for (Iterator it = headers.keySet().iterator(); it.hasNext();) {
			String headerName = (String) it.next();
			if (headerName.equalsIgnoreCase(name)) {
				return (HeaderValueHolder) headers.get(headerName);
			}
		}
		return null;
	}

}