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/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.entity.mime;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
/**
* The header of an entity (see RFC 2045).
*/
public class Header implements Iterable<MinimalField> {
private final List<MinimalField> fields;
private final Map<String, List<MinimalField>> fieldMap;
public Header() {
super();
this.fields = new LinkedList<MinimalField>();
this.fieldMap = new HashMap<String, List<MinimalField>>();
}
public void addField(final MinimalField field) {
if (field == null) {
return;
}
final String key = field.getName().toLowerCase(Locale.ENGLISH);
List<MinimalField> values = this.fieldMap.get(key);
if (values == null) {
values = new LinkedList<MinimalField>();
this.fieldMap.put(key, values);
}
values.add(field);
this.fields.add(field);
}
public List<MinimalField> getFields() {
return new ArrayList<MinimalField>(this.fields);
}
public MinimalField getField(final String name) {
if (name == null) {
return null;
}
final String key = name.toLowerCase(Locale.ENGLISH);
final List<MinimalField> list = this.fieldMap.get(key);
if (list != null && !list.isEmpty()) {
return list.get(0);
}
return null;
}
public List<MinimalField> getFields(final String name) {
if (name == null) {
return null;
}
final String key = name.toLowerCase(Locale.ENGLISH);
final List<MinimalField> list = this.fieldMap.get(key);
if (list == null || list.isEmpty()) {
return Collections.emptyList();
} else {
return new ArrayList<MinimalField>(list);
}
}
public int removeFields(final String name) {
if (name == null) {
return 0;
}
final String key = name.toLowerCase(Locale.ENGLISH);
final List<MinimalField> removed = fieldMap.remove(key);
if (removed == null || removed.isEmpty()) {
return 0;
}
this.fields.removeAll(removed);
return removed.size();
}
public void setField(final MinimalField field) {
if (field == null) {
return;
}
final String key = field.getName().toLowerCase(Locale.ENGLISH);
final List<MinimalField> list = fieldMap.get(key);
if (list == null || list.isEmpty()) {
addField(field);
return;
}
list.clear();
list.add(field);
int firstOccurrence = -1;
int index = 0;
for (final Iterator<MinimalField> it = this.fields.iterator(); it.hasNext(); index++) {
final MinimalField f = it.next();
if (f.getName().equalsIgnoreCase(field.getName())) {
it.remove();
if (firstOccurrence == -1) {
firstOccurrence = index;
}
}
}
this.fields.add(firstOccurrence, field);
}
public Iterator<MinimalField> iterator() {
return Collections.unmodifiableList(fields).iterator();
}
@Override
public String toString() {
return this.fields.toString();
}
}
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