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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * Copyright 2012 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 org.jboss.netty.handler.codec.spdy;

import org.jboss.netty.util.internal.StringUtil;

import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

/**
 * The default {@link SpdySettingsFrame} implementation.
 */
public class DefaultSpdySettingsFrame implements SpdySettingsFrame {

    private boolean clear;
    private final Map settingsMap = new TreeMap();

    @Deprecated
    public Set getIDs() {
        return getIds();
    }

    public Set getIds() {
        return settingsMap.keySet();
    }

    public boolean isSet(int id) {
        Integer key = id;
        return settingsMap.containsKey(key);
    }

    public int getValue(int id) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            return settingsMap.get(key).getValue();
        } else {
            return -1;
        }
    }

    public void setValue(int id, int value) {
        setValue(id, value, false, false);
    }

    public void setValue(int id, int value, boolean persistValue, boolean persisted) {
        if (id <= 0 || id > SpdyCodecUtil.SPDY_SETTINGS_MAX_ID) {
            throw new IllegalArgumentException("Setting ID is not valid: " + id);
        }
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            Setting setting = settingsMap.get(key);
            setting.setValue(value);
            setting.setPersist(persistValue);
            setting.setPersisted(persisted);
        } else {
            settingsMap.put(key, new Setting(value, persistValue, persisted));
        }
    }

    public void removeValue(int id) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            settingsMap.remove(key);
        }
    }

    @Deprecated
    public boolean persistValue(int id) {
        return isPersistValue(id);
    }

    public boolean isPersistValue(int id) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            return settingsMap.get(key).isPersist();
        } else {
            return false;
        }
    }

    public void setPersistValue(int id, boolean persistValue) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            settingsMap.get(key).setPersist(persistValue);
        }
    }

    public boolean isPersisted(int id) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            return settingsMap.get(key).isPersisted();
        } else {
            return false;
        }
    }

    public void setPersisted(int id, boolean persisted) {
        Integer key = id;
        if (settingsMap.containsKey(key)) {
            settingsMap.get(key).setPersisted(persisted);
        }
    }

    public boolean clearPreviouslyPersistedSettings() {
        return clear;
    }

    public void setClearPreviouslyPersistedSettings(boolean clear) {
        this.clear = clear;
    }

    private Set> getSettings() {
        return settingsMap.entrySet();
    }

    private void appendSettings(StringBuilder buf) {
        for (Map.Entry e: getSettings()) {
            Setting setting = e.getValue();
            buf.append("--> ");
            buf.append(e.getKey().toString());
            buf.append(':');
            buf.append(setting.getValue());
            buf.append(" (persist value: ");
            buf.append(setting.isPersist());
            buf.append("; persisted: ");
            buf.append(setting.isPersisted());
            buf.append(')');
            buf.append(StringUtil.NEWLINE);
        }
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        buf.append(getClass().getSimpleName());
        buf.append(StringUtil.NEWLINE);
        appendSettings(buf);
        buf.setLength(buf.length() - StringUtil.NEWLINE.length());
        return buf.toString();
    }

    private static final class Setting {

        private int value;
        private boolean persist;
        private boolean persisted;

        Setting(int value, boolean persist, boolean persisted) {
            this.value = value;
            this.persist = persist;
            this.persisted = persisted;
        }

        int getValue() {
            return value;
        }

        void setValue(int value) {
            this.value = value;
        }

        boolean isPersist() {
            return persist;
        }

        void setPersist(boolean persist) {
            this.persist = persist;
        }

        boolean isPersisted() {
            return persisted;
        }

        void setPersisted(boolean persisted) {
            this.persisted = persisted;
        }
    }
}