    001    package org.maltparser.parser.algorithm.nivre;
    002
    003    import org.maltparser.core.exception.MaltChainedException;
    004    import org.maltparser.core.feature.function.AddressFunction;
    005    import org.maltparser.core.feature.value.AddressValue;
    006    import org.maltparser.parser.Algorithm;
    007    import org.maltparser.parser.ParsingException;
    008
    009    /**
    010    *
    011    * @author Johan Hall
    012    **/
    013    public class NivreAddressFunction extends AddressFunction {
    014            public enum NivreSubFunction {
    015                    STACK, INPUT
    016            };
    017            protected String subFunctionName;
    018            protected NivreSubFunction subFunction;
    019            protected Algorithm parsingAlgorithm;
    020            protected int index;
    021
    022            public NivreAddressFunction(String subFunctionName, Algorithm parsingAlgorithm) {
    023                    super();
    024                    setSubFunctionName(subFunctionName);
    025                    setAlgorithm(parsingAlgorithm);
    026            }
    027
    028            public void initialize(Object[] arguments) throws MaltChainedException {
    029                    if (arguments.length != 1) {
    030                            throw new ParsingException("Could not initialize "+this.getClass().getName()+": number of arguments are not correct. ");
    031                    }
    032                    if (!(arguments[0] instanceof Integer)) {
    033                            throw new ParsingException("Could not initialize "+this.getClass().getName()+": the first argument is not an integer. ");
    034                    }
    035
    036                    setIndex(((Integer)arguments[0]).intValue());
    037            }
    038
    039            public Class<?>[] getParameterTypes() {
    040                    Class<?>[] paramTypes = { java.lang.Integer.class };
    041                    return paramTypes;
    042            }
    043
    044            public void update() throws MaltChainedException {
    045                    update((NivreConfig)parsingAlgorithm.getCurrentParserConfiguration());
    046            }
    047
    048            public void update(Object[] arguments) throws MaltChainedException {
    049                    if (arguments.length != 1 || !(arguments[0] instanceof NivreConfig)) {
    050                            throw new ParsingException("Arguments to the Nivre address function is not correct. ");
    051                    }
    052                    update((NivreConfig)arguments[0]);
    053            }
    054
    055            private void update(NivreConfig config) throws MaltChainedException {
    056                    if (subFunction == NivreSubFunction.STACK) {
    057                            address.setAddress(config.getStackNode(index));
    058                    } else if (subFunction == NivreSubFunction.INPUT) {
    059                            address.setAddress(config.getInputNode(index));
    060                    } else {
    061                            address.setAddress(null);
    062                    }
    063            }
    064
    065            public String getSubFunctionName() {
    066                    return subFunctionName;
    067            }
    068
    069            public void setSubFunctionName(String subFunctionName) {
    070                    this.subFunctionName = subFunctionName;
    071                    subFunction = NivreSubFunction.valueOf(subFunctionName.toUpperCase());
    072            }
    073
    074            public NivreSubFunction getSubFunction() {
    075                    return subFunction;
    076            }
    077
    078            public AddressValue getAddressValue() {
    079                    return address;
    080            }
    081
    082            public Algorithm getParsingAlgorithm() {
    083                    return parsingAlgorithm;
    084            }
    085
    086            public void setAlgorithm(Algorithm parsingAlgorithm) {
    087                    this.parsingAlgorithm = parsingAlgorithm;
    088            }
    089
    090            public int getIndex() {
    091                    return index;
    092            }
    093
    094            public void setIndex(int index) {
    095                    this.index = index;
    096            }
    097
    098            public boolean equals(Object obj) {
    099                    if (this == obj)
    100                            return true;
    101                    if (obj == null)
    102                            return false;
    103                    if (getClass() != obj.getClass())
    104                            return false;
    105
    106                    NivreAddressFunction other = (NivreAddressFunction) obj;
    107                    if (index != other.index)
    108                            return false;
    109                    if (parsingAlgorithm == null) {
    110                            if (other.parsingAlgorithm != null)
    111                                    return false;
    112                    } else if (!parsingAlgorithm.equals(other.parsingAlgorithm))
    113                            return false;
    114                    if (subFunction == null) {
    115                            if (other.subFunction != null)
    116                                    return false;
    117                    } else if (!subFunction.equals(other.subFunction))
    118                            return false;
    119                    return true;
    120            }
    121
    122            public String toString() {
    123                    return subFunctionName + "[" + index + "]";
    124            }
    125    }