    001    package org.maltparser.core.syntaxgraph;
    002
    003    import java.util.Observer;
    004
    005    import org.maltparser.core.exception.MaltChainedException;
    006    import org.maltparser.core.pool.ObjectPoolList;
    007    import org.maltparser.core.symbol.SymbolTableHandler;
    008    /**
    009    *
    010    *
    011    * @author Johan Hall
    012    */
    013    public abstract class SyntaxGraph implements LabeledStructure, Structure, Observer {
    014            protected SymbolTableHandler symbolTables;
    015            protected final ObjectPoolList<LabelSet> labelSetPool;
    016            protected int numberOfComponents;
    017
    018            public SyntaxGraph(SymbolTableHandler symbolTables) throws MaltChainedException  {
    019                    this.symbolTables = symbolTables;
    020                    labelSetPool = new ObjectPoolList<LabelSet>() {
    021                            protected LabelSet create() { return new LabelSet(6); }
    022                            public void resetObject(LabelSet o) throws MaltChainedException { o.clear(); }
    023                    };
    024            }
    025
    026            public SymbolTableHandler getSymbolTables() {
    027                    return symbolTables;
    028            }
    029
    030            public void setSymbolTables(SymbolTableHandler symbolTables) {
    031                    this.symbolTables = symbolTables;
    032            }
    033
    034            public void addLabel(Element element, String labelFunction, String label) throws MaltChainedException {
    035                    element.addLabel(symbolTables.addSymbolTable(labelFunction), label);
    036            }
    037
    038            public LabelSet checkOutNewLabelSet() throws MaltChainedException {
    039                    return labelSetPool.checkOut();
    040            }
    041
    042            public void checkInLabelSet(LabelSet labelSet) throws MaltChainedException {
    043                    labelSetPool.checkIn(labelSet);
    044            }
    045
    046            public void clear() throws MaltChainedException {
    047                    numberOfComponents = 0;
    048                    labelSetPool.checkInAll();
    049            }
    050    }