InfoResponse.java

package org.ggp.base.util.presence;

import java.util.ArrayList;
import java.util.List;

import org.ggp.base.util.symbol.factory.SymbolFactory;
import org.ggp.base.util.symbol.factory.exceptions.SymbolFormatException;
import org.ggp.base.util.symbol.grammar.Symbol;
import org.ggp.base.util.symbol.grammar.SymbolAtom;
import org.ggp.base.util.symbol.grammar.SymbolList;
import org.ggp.base.util.symbol.grammar.SymbolPool;

/**
 * Wherein we poorly reinvent JSON, so that we can keep INFO responses
 * consistent with the Symbol-based KIF format that the other GGP protocol
 * messages are in.
 *
 * @author schreib
 */

public class InfoResponse {
    private String name;
    private String status;
    private String species;

    public InfoResponse() {
        ;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public void setSpecies(String species) {
        this.species = species;
    }

    public String getName() {
        return name;
    }

    public String getStatus() {
        return status;
    }

    public String getSpecies() {
        return species;
    }

    public InfoResponse(Symbol symbol) {
        if (symbol instanceof SymbolList) {
            SymbolList pairs = (SymbolList)symbol;
            for (int i = 0; i < pairs.size(); i++) {
                Symbol pairSymbol = pairs.get(i);
                if (pairSymbol instanceof SymbolList) {
                    SymbolList pair = (SymbolList)pairSymbol;
                    if (pair.size() < 2) continue;
                    String key = pair.get(0).toString().toLowerCase();
                    String value = "";
                    for (int j = 1; j < pair.size(); j++) {
                        value += pair.get(j).toString();
                    }
                    if (key.equals("name")) {
                        name = value;
                    } else if (key.equals("status")) {
                        status = value;
                    } else if (key.equals("species")) {
                        species = value;
                    }
                }
            }
        } else if (symbol instanceof SymbolAtom) {
            status = ((SymbolAtom) symbol).getValue();
        }
    }

    public static InfoResponse create(String original) {
        try {
            return new InfoResponse(SymbolFactory.create(original));
        } catch (SymbolFormatException e) {
            return new InfoResponse();
        }
    }

    private Symbol getKeyValueSymbol(String key, String value) {
        Symbol keySymbol = SymbolPool.getAtom(key);
        Symbol valueSymbol = SymbolPool.getAtom(value);
        return SymbolPool.getList(new Symbol[] {keySymbol, valueSymbol} );
    }

    public Symbol toSymbol() {
        List<Symbol> infoList = new ArrayList<Symbol>();
        if (name != null) {
            infoList.add(getKeyValueSymbol("name", name));
        }
        if (status != null) {
            infoList.add(getKeyValueSymbol("status", status));
        }
        if (species != null) {
            infoList.add(getKeyValueSymbol("species", species));
        }
        return SymbolPool.getList(infoList);
    }
}