    001    package org.maltparser.core.syntaxgraph.feature;
    002
    003    import org.maltparser.core.exception.MaltChainedException;
    004    import org.maltparser.core.feature.FeatureException;
    005    import org.maltparser.core.feature.function.AddressFunction;
    006    import org.maltparser.core.feature.function.FeatureFunction;
    007    import org.maltparser.core.feature.value.AddressValue;
    008    import org.maltparser.core.feature.value.FeatureValue;
    009    import org.maltparser.core.feature.value.SingleFeatureValue;
    010    import org.maltparser.core.io.dataformat.ColumnDescription;
    011    import org.maltparser.core.io.dataformat.DataFormatInstance;
    012    import org.maltparser.core.symbol.SymbolTable;
    013    import org.maltparser.core.symbol.SymbolTableHandler;
    014    import org.maltparser.core.symbol.nullvalue.NullValues.NullValueId;
    015    import org.maltparser.core.syntaxgraph.node.DependencyNode;
    016    /**
    017    *
    018    * @author Johan Hall
    019    * @since 1.1
    020    **/
    021    public class InputArcDirFeature implements FeatureFunction {
    022            protected ColumnDescription column;
    023            protected DataFormatInstance dataFormatInstance;
    024            protected SymbolTableHandler tableHandler;
    025            protected SymbolTable table;
    026            protected SingleFeatureValue featureValue;
    027            protected AddressFunction addressFunction;
    028
    029            public InputArcDirFeature(DataFormatInstance dataFormatInstance, SymbolTableHandler tableHandler) throws MaltChainedException {
    030                    super();
    031                    setDataFormatInstance(dataFormatInstance);
    032                    setTableHandler(tableHandler);
    033                    setFeatureValue(new SingleFeatureValue(this));
    034            }
    035
    036            public void initialize(Object[] arguments) throws MaltChainedException {
    037                    if (arguments.length != 2) {
    038                            throw new FeatureException("Could not initialize InputArcDirFeature: number of arguments are not correct. ");
    039                    }
    040                    if (!(arguments[0] instanceof String)) {
    041                            throw new FeatureException("Could not initialize InputArcDirFeature: the first argument is not a string. ");
    042                    }
    043                    if (!(arguments[1] instanceof AddressFunction)) {
    044                            throw new FeatureException("Could not initialize InputArcDirFeature: the second argument is not an address function. ");
    045                    }
    046                    setColumn(dataFormatInstance.getColumnDescriptionByName((String)arguments[0]));
    047                    setSymbolTable(tableHandler.addSymbolTable("ARCDIR_"+column.getName(),ColumnDescription.INPUT, "one"));
    048                    table.addSymbol("LEFT");
    049                    table.addSymbol("RIGHT");
    050                    table.addSymbol("ROOT");
    051                    setAddressFunction((AddressFunction)arguments[1]);
    052            }
    053
    054            public Class<?>[] getParameterTypes() {
    055                    Class<?>[] paramTypes = { java.lang.String.class, org.maltparser.core.feature.function.AddressFunction.class };
    056                    return paramTypes;
    057            }
    058
    059            public int getCode(String symbol) throws MaltChainedException {
    060                    return table.getSymbolStringToCode(symbol);
    061            }
    062
    063            public String getSymbol(int code) throws MaltChainedException {
    064                    return table.getSymbolCodeToString(code);
    065            }
    066
    067            public FeatureValue getFeatureValue() {
    068                    return featureValue;
    069            }
    070
    071            public void updateCardinality() throws MaltChainedException {
    072    //              featureValue.setCardinality(table.getValueCounter());
    073            }
    074
    075            public void update() throws MaltChainedException {
    076                    AddressValue a = addressFunction.getAddressValue();
    077                    if (a.getAddress() != null && a.getAddressClass() == org.maltparser.core.syntaxgraph.node.DependencyNode.class) {
    078                            DependencyNode node = (DependencyNode)a.getAddress();
    079                            try {
    080                                    int index = Integer.parseInt(node.getLabelSymbol(column.getSymbolTable()));
    081                                    if (node.isRoot()) {
    082                                            featureValue.setIndexCode(table.getNullValueCode(NullValueId.ROOT_NODE));
    083                                            featureValue.setSymbol(table.getNullValueSymbol(NullValueId.ROOT_NODE));
    084                                            featureValue.setNullValue(true);
    085                                    } else if (index == 0) {
    086                                            featureValue.setIndexCode(table.getSymbolStringToCode("ROOT"));
    087                                            featureValue.setSymbol("ROOT");
    088                                            featureValue.setNullValue(false);
    089                                    } else if (index < node.getIndex()) {
    090                                            featureValue.setIndexCode(table.getSymbolStringToCode("LEFT"));
    091                                            featureValue.setSymbol("LEFT");
    092                                            featureValue.setNullValue(false);
    093                                    } else if (index > node.getIndex()) {
    094                                            featureValue.setIndexCode(table.getSymbolStringToCode("RIGHT"));
    095                                            featureValue.setSymbol("RIGHT");
    096                                            featureValue.setNullValue(false);
    097                                    }
    098                            } catch (NumberFormatException e) {
    099                                    throw new FeatureException("The index of the feature must be an integer value. ", e);
    100                            }
    101                    } else {
    102                            featureValue.setIndexCode(table.getNullValueCode(NullValueId.NO_NODE));
    103                            featureValue.setSymbol(table.getNullValueSymbol(NullValueId.NO_NODE));
    104                            featureValue.setNullValue(true);
    105                    }
    106                    featureValue.setValue(1);
    107    //              featureValue.setKnown(true);
    108            }
    109
    110            public AddressFunction getAddressFunction() {
    111                    return addressFunction;
    112            }
    113
    114            public void setAddressFunction(AddressFunction addressFunction) {
    115                    this.addressFunction = addressFunction;
    116            }
    117
    118            public ColumnDescription getColumn() {
    119                    return column;
    120            }
    121
    122            public void setColumn(ColumnDescription column) throws MaltChainedException {
    123                    if (column.getType() != ColumnDescription.INTEGER) {
    124                            throw new FeatureException("InputArc feature column must be of type integer. ");
    125                    }
    126                    this.column = column;
    127            }
    128
    129            public DataFormatInstance getDataFormatInstance() {
    130                    return dataFormatInstance;
    131            }
    132
    133            public void setDataFormatInstance(DataFormatInstance dataFormatInstance) {
    134                    this.dataFormatInstance = dataFormatInstance;
    135            }
    136
    137            public void setFeatureValue(SingleFeatureValue featureValue) {
    138                    this.featureValue = featureValue;
    139            }
    140
    141            public SymbolTable getSymbolTable() {
    142                    return table;
    143            }
    144
    145            public void setSymbolTable(SymbolTable table) {
    146                    this.table = table;
    147            }
    148
    149            public SymbolTableHandler getTableHandler() {
    150                    return tableHandler;
    151            }
    152
    153            public void setTableHandler(SymbolTableHandler tableHandler) {
    154                    this.tableHandler = tableHandler;
    155            }
    156
    157            public boolean equals(Object obj) {
    158                    if (!(obj instanceof InputArcDirFeature)) {
    159                            return false;
    160                    }
    161                    if (!obj.toString().equals(this.toString())) {
    162                            return false;
    163                    }
    164                    return true;
    165            }
    166
    167            public String toString() {
    168                    return "InputArcDir(" + column.getName() + ", " + addressFunction.toString() + ")";
    169            }
    170    }