Motivation: Checking if a key exists on a TreeMap has a Big O of "log 2 N", doing it twice is not cheap. Modifications: Get the key instead which has the same cost and check if it is null. Result: Faster code due to one expensive operation removed.
185 lines
5.1 KiB
Java
185 lines
5.1 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.spdy;
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import io.netty.util.internal.StringUtil;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeMap;
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/**
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* The default {@link SpdySettingsFrame} implementation.
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*/
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public class DefaultSpdySettingsFrame implements SpdySettingsFrame {
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private boolean clear;
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private final Map<Integer, Setting> settingsMap = new TreeMap<Integer, Setting>();
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@Override
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public Set<Integer> ids() {
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return settingsMap.keySet();
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}
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@Override
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public boolean isSet(int id) {
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return settingsMap.containsKey(id);
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}
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@Override
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public int getValue(int id) {
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final Setting setting = settingsMap.get(id);
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return setting != null ? setting.getValue() : -1;
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}
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@Override
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public SpdySettingsFrame setValue(int id, int value) {
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return setValue(id, value, false, false);
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}
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@Override
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public SpdySettingsFrame setValue(int id, int value, boolean persistValue, boolean persisted) {
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if (id < 0 || id > SpdyCodecUtil.SPDY_SETTINGS_MAX_ID) {
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throw new IllegalArgumentException("Setting ID is not valid: " + id);
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}
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final Integer key = Integer.valueOf(id);
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final Setting setting = settingsMap.get(key);
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if (setting != null) {
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setting.setValue(value);
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setting.setPersist(persistValue);
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setting.setPersisted(persisted);
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} else {
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settingsMap.put(key, new Setting(value, persistValue, persisted));
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}
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return this;
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}
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@Override
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public SpdySettingsFrame removeValue(int id) {
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settingsMap.remove(id);
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return this;
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}
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@Override
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public boolean isPersistValue(int id) {
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final Setting setting = settingsMap.get(id);
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return setting != null && setting.isPersist();
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}
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@Override
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public SpdySettingsFrame setPersistValue(int id, boolean persistValue) {
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final Setting setting = settingsMap.get(id);
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if (setting != null) {
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setting.setPersist(persistValue);
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}
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return this;
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}
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@Override
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public boolean isPersisted(int id) {
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final Setting setting = settingsMap.get(id);
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return setting != null && setting.isPersisted();
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}
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@Override
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public SpdySettingsFrame setPersisted(int id, boolean persisted) {
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final Setting setting = settingsMap.get(id);
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if (setting != null) {
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setting.setPersisted(persisted);
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}
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return this;
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}
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@Override
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public boolean clearPreviouslyPersistedSettings() {
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return clear;
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}
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@Override
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public SpdySettingsFrame setClearPreviouslyPersistedSettings(boolean clear) {
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this.clear = clear;
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return this;
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}
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private Set<Map.Entry<Integer, Setting>> getSettings() {
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return settingsMap.entrySet();
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}
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private void appendSettings(StringBuilder buf) {
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for (Map.Entry<Integer, Setting> e: getSettings()) {
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Setting setting = e.getValue();
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buf.append("--> ");
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buf.append(e.getKey());
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buf.append(':');
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buf.append(setting.getValue());
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buf.append(" (persist value: ");
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buf.append(setting.isPersist());
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buf.append("; persisted: ");
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buf.append(setting.isPersisted());
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buf.append(')');
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buf.append(StringUtil.NEWLINE);
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}
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}
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@Override
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public String toString() {
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StringBuilder buf = new StringBuilder()
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.append(StringUtil.simpleClassName(this))
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.append(StringUtil.NEWLINE);
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appendSettings(buf);
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buf.setLength(buf.length() - StringUtil.NEWLINE.length());
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return buf.toString();
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}
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private static final class Setting {
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private int value;
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private boolean persist;
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private boolean persisted;
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Setting(int value, boolean persist, boolean persisted) {
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this.value = value;
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this.persist = persist;
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this.persisted = persisted;
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}
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int getValue() {
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return value;
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}
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void setValue(int value) {
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this.value = value;
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}
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boolean isPersist() {
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return persist;
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}
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void setPersist(boolean persist) {
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this.persist = persist;
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}
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boolean isPersisted() {
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return persisted;
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}
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void setPersisted(boolean persisted) {
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this.persisted = persisted;
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}
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}
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}
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