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/*
* Copyright 2014 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;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import static io.netty.handler.codec.DefaultHeaders.HASH_CODE_SEED;
public class EmptyHeaders> implements Headers {
@Override
public V get(K name) {
return null;
}
@Override
public V get(K name, V defaultValue) {
return defaultValue;
}
@Override
public V getAndRemove(K name) {
return null;
}
@Override
public V getAndRemove(K name, V defaultValue) {
return defaultValue;
}
@Override
public List getAll(K name) {
return Collections.emptyList();
}
@Override
public List getAllAndRemove(K name) {
return Collections.emptyList();
}
@Override
public Boolean getBoolean(K name) {
return null;
}
@Override
public boolean getBoolean(K name, boolean defaultValue) {
return defaultValue;
}
@Override
public Byte getByte(K name) {
return null;
}
@Override
public byte getByte(K name, byte defaultValue) {
return defaultValue;
}
@Override
public Character getChar(K name) {
return null;
}
@Override
public char getChar(K name, char defaultValue) {
return defaultValue;
}
@Override
public Short getShort(K name) {
return null;
}
@Override
public short getShort(K name, short defaultValue) {
return defaultValue;
}
@Override
public Integer getInt(K name) {
return null;
}
@Override
public int getInt(K name, int defaultValue) {
return defaultValue;
}
@Override
public Long getLong(K name) {
return null;
}
@Override
public long getLong(K name, long defaultValue) {
return defaultValue;
}
@Override
public Float getFloat(K name) {
return null;
}
@Override
public float getFloat(K name, float defaultValue) {
return defaultValue;
}
@Override
public Double getDouble(K name) {
return null;
}
@Override
public double getDouble(K name, double defaultValue) {
return defaultValue;
}
@Override
public Long getTimeMillis(K name) {
return null;
}
@Override
public long getTimeMillis(K name, long defaultValue) {
return defaultValue;
}
@Override
public Boolean getBooleanAndRemove(K name) {
return null;
}
@Override
public boolean getBooleanAndRemove(K name, boolean defaultValue) {
return defaultValue;
}
@Override
public Byte getByteAndRemove(K name) {
return null;
}
@Override
public byte getByteAndRemove(K name, byte defaultValue) {
return defaultValue;
}
@Override
public Character getCharAndRemove(K name) {
return null;
}
@Override
public char getCharAndRemove(K name, char defaultValue) {
return defaultValue;
}
@Override
public Short getShortAndRemove(K name) {
return null;
}
@Override
public short getShortAndRemove(K name, short defaultValue) {
return defaultValue;
}
@Override
public Integer getIntAndRemove(K name) {
return null;
}
@Override
public int getIntAndRemove(K name, int defaultValue) {
return defaultValue;
}
@Override
public Long getLongAndRemove(K name) {
return null;
}
@Override
public long getLongAndRemove(K name, long defaultValue) {
return defaultValue;
}
@Override
public Float getFloatAndRemove(K name) {
return null;
}
@Override
public float getFloatAndRemove(K name, float defaultValue) {
return defaultValue;
}
@Override
public Double getDoubleAndRemove(K name) {
return null;
}
@Override
public double getDoubleAndRemove(K name, double defaultValue) {
return defaultValue;
}
@Override
public Long getTimeMillisAndRemove(K name) {
return null;
}
@Override
public long getTimeMillisAndRemove(K name, long defaultValue) {
return defaultValue;
}
@Override
public boolean contains(K name) {
return false;
}
@Override
public boolean contains(K name, V value) {
return false;
}
@Override
public boolean containsObject(K name, Object value) {
return false;
}
@Override
public boolean containsBoolean(K name, boolean value) {
return false;
}
@Override
public boolean containsByte(K name, byte value) {
return false;
}
@Override
public boolean containsChar(K name, char value) {
return false;
}
@Override
public boolean containsShort(K name, short value) {
return false;
}
@Override
public boolean containsInt(K name, int value) {
return false;
}
@Override
public boolean containsLong(K name, long value) {
return false;
}
@Override
public boolean containsFloat(K name, float value) {
return false;
}
@Override
public boolean containsDouble(K name, double value) {
return false;
}
@Override
public boolean containsTimeMillis(K name, long value) {
return false;
}
@Override
public int size() {
return 0;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public Set names() {
return Collections.emptySet();
}
@Override
public T add(K name, V value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T add(K name, Iterable values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T add(K name, V... values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addObject(K name, Object value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addObject(K name, Iterable values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addObject(K name, Object... values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addBoolean(K name, boolean value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addByte(K name, byte value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addChar(K name, char value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addShort(K name, short value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addInt(K name, int value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addLong(K name, long value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addFloat(K name, float value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addDouble(K name, double value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T addTimeMillis(K name, long value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T add(Headers headers) {
throw new UnsupportedOperationException("read only");
}
@Override
public T set(K name, V value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T set(K name, Iterable values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T set(K name, V... values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setObject(K name, Object value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setObject(K name, Iterable values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setObject(K name, Object... values) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setBoolean(K name, boolean value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setByte(K name, byte value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setChar(K name, char value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setShort(K name, short value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setInt(K name, int value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setLong(K name, long value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setFloat(K name, float value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setDouble(K name, double value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setTimeMillis(K name, long value) {
throw new UnsupportedOperationException("read only");
}
@Override
public T set(Headers headers) {
throw new UnsupportedOperationException("read only");
}
@Override
public T setAll(Headers headers) {
throw new UnsupportedOperationException("read only");
}
@Override
public boolean remove(K name) {
return false;
}
@Override
public T clear() {
return thisT();
}
/**
* Equivalent to {@link #getAll(Object)} but no intermediate list is generated.
* @param name the name of the header to retrieve
* @return an {@link Iterator} of header values corresponding to {@code name}.
*/
public Iterator valueIterator(@SuppressWarnings("unused") K name) {
List empty = Collections.emptyList();
return empty.iterator();
}
@Override
public Iterator> iterator() {
List> empty = Collections.emptyList();
return empty.iterator();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof Headers)) {
return false;
}
Headers rhs = (Headers) o;
return isEmpty() && rhs.isEmpty();
}
@Override
public int hashCode() {
return HASH_CODE_SEED;
}
@Override
public String toString() {
return new StringBuilder(getClass().getSimpleName()).append('[').append(']').toString();
}
@SuppressWarnings("unchecked")
private T thisT() {
return (T) this;
}
}
