TableContainer.java

package org.maltparser.parser.history.container;

import org.maltparser.core.exception.MaltChainedException;
import org.maltparser.core.symbol.Table;

/**
 *
 * @author Johan Hall
*
 */
public class TableContainer {

    public enum RelationToNextDecision {

        COMBINED, SEQUANTIAL, BRANCHED, SWITCHED, NONE
    }
    protected int cachedCode;
    protected final StringBuilder cachedSymbol;
    protected Table table;
    protected String name;
    private RelationToNextDecision relationToNextDecision;

    public TableContainer(Table table, String name, char decisionSeparator) {
        this.table = table;
        this.name = name;
        switch (decisionSeparator) {
            case '+':
                this.relationToNextDecision = RelationToNextDecision.COMBINED;
                break;
            case ',':
                this.relationToNextDecision = RelationToNextDecision.SEQUANTIAL;
                break;
            case ';':
                this.relationToNextDecision = RelationToNextDecision.BRANCHED;
                break;
            case '#':
                this.relationToNextDecision = RelationToNextDecision.BRANCHED;
                break;
            case '?':
                this.relationToNextDecision = RelationToNextDecision.SWITCHED;
                break;
            default:
                this.relationToNextDecision = RelationToNextDecision.NONE;
        }
        cachedSymbol = new StringBuilder();
        cachedCode = -1;
    }

    public void clearCache() {
        cachedCode = -1;
        cachedSymbol.setLength(0);
    }

    public String getSymbol(int code) throws MaltChainedException {
        if (code < 0 && !containCode(code)) {
            clearCache();
            return null;
        }
        if (cachedCode != code) {
            clearCache();
            cachedCode = code;
            cachedSymbol.append(table.getSymbolCodeToString(cachedCode));
        }
        return cachedSymbol.toString();
    }

    public int getCode(String symbol) throws MaltChainedException {
        if (cachedSymbol == null || !cachedSymbol.equals(symbol)) {
            clearCache();
            cachedSymbol.append(symbol);
            cachedCode = table.getSymbolStringToCode(symbol);
        }
        return cachedCode;
    }

    public boolean containCode(int code) throws MaltChainedException {
        if (cachedCode != code) {
            clearCache();
            cachedSymbol.append(table.getSymbolCodeToString(code));
            if (cachedSymbol == null) {
                return false;
            }
            cachedCode = code;
        }
        return true;
    }

    public boolean containSymbol(String symbol) throws MaltChainedException {
        if (cachedSymbol == null || !cachedSymbol.equals(symbol)) {
            clearCache();
            cachedCode = table.getSymbolStringToCode(symbol);
            if (cachedCode < 0) {
                return false;
            }
            cachedSymbol.append(symbol);
        }
        return true;
    }

    public boolean continueWithNextDecision(int code) throws MaltChainedException {
        if (table instanceof DecisionPropertyTable) {
            return ((DecisionPropertyTable) table).continueWithNextDecision(code);
        }
        return true;
    }

    public boolean continueWithNextDecision(String symbol) throws MaltChainedException {
        if (table instanceof DecisionPropertyTable) {
            return ((DecisionPropertyTable) table).continueWithNextDecision(symbol);
        }
        return true;
    }

    public Table getTable() {
        return table;
    }

    public String getTableName() {
        return table != null ? table.getName() : null;
    }

    public String getTableContainerName() {
        return name;
    }

    public RelationToNextDecision getRelationToNextDecision() {
        return relationToNextDecision;
    }

    protected void setTable(Table table) {
        this.table = table;
    }

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

    public int size() {
        return table.size();
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append(name);
        sb.append(" -> ");
        sb.append(cachedSymbol);
        sb.append(" = ");
        sb.append(cachedCode);
        return sb.toString();
    }
}