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Java example source code file (EmptyHttpHeaders.java)
This example Java source code file (EmptyHttpHeaders.java) is included in the alvinalexander.com
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The EmptyHttpHeaders.java Java example source code
/*
* Copyright 2015 The Netty Project
*
* The Netty Project 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 io.netty.handler.codec.http;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
public class EmptyHttpHeaders extends HttpHeaders {
static final Iterator<Entry EMPTY_CHARS_ITERATOR =
Collections.<EntryemptyList().iterator();
public static final EmptyHttpHeaders INSTANCE = instance();
/**
* @deprecated Use {@link EmptyHttpHeaders#INSTANCE}
* <p>
* This is needed to break a cyclic static initialization loop between {@link HttpHeaders} and
* {@link EmptyHttpHeaders}.
* @see HttpUtil#EMPTY_HEADERS
*/
@Deprecated
static EmptyHttpHeaders instance() {
return HttpUtil.EMPTY_HEADERS;
}
protected EmptyHttpHeaders() {
}
@Override
public String get(String name) {
return null;
}
@Override
public Integer getInt(CharSequence name) {
return null;
}
@Override
public int getInt(CharSequence name, int defaultValue) {
return defaultValue;
}
@Override
public Short getShort(CharSequence name) {
return null;
}
@Override
public short getShort(CharSequence name, short defaultValue) {
return defaultValue;
}
@Override
public Long getTimeMillis(CharSequence name) {
return null;
}
@Override
public long getTimeMillis(CharSequence name, long defaultValue) {
return defaultValue;
}
@Override
public List<String> getAll(String name) {
return Collections.emptyList();
}
@Override
public List<Entry entries() {
return Collections.emptyList();
}
@Override
public boolean contains(String name) {
return false;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public int size() {
return 0;
}
@Override
public Set<String> names() {
return Collections.emptySet();
}
@Override
public HttpHeaders add(String name, Object value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders add(String name, Iterable<?> values) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders addInt(CharSequence name, int value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders addShort(CharSequence name, short value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders set(String name, Object value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders set(String name, Iterable<?> values) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders setInt(CharSequence name, int value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders setShort(CharSequence name, short value) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders remove(String name) {
throw new UnsupportedOperationException("read only");
}
@Override
public HttpHeaders clear() {
throw new UnsupportedOperationException("read only");
}
@Override
public Iterator<Entry iterator() {
return entries().iterator();
}
@Override
public Iterator<Entry iteratorCharSequence() {
return EMPTY_CHARS_ITERATOR;
}
}
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