ColumnFeature.java

package org.maltparser.core.syntaxgraph.feature;

import org.maltparser.core.exception.MaltChainedException;
import org.maltparser.core.feature.FeatureException;
import org.maltparser.core.feature.function.FeatureFunction;
import org.maltparser.core.feature.function.Modifiable;
import org.maltparser.core.feature.value.FeatureValue;
import org.maltparser.core.feature.value.SingleFeatureValue;
import org.maltparser.core.io.dataformat.ColumnDescription;
import org.maltparser.core.symbol.SymbolTable;
import org.maltparser.core.symbol.nullvalue.NullValues.NullValueId;

/**
 *
 *
 * @author Johan Hall
 */
public abstract class ColumnFeature implements FeatureFunction, Modifiable {

    protected ColumnDescription column;
    protected final SingleFeatureValue featureValue;

    public ColumnFeature() throws MaltChainedException {
        featureValue = new SingleFeatureValue(this);
    }

    public abstract void update() throws MaltChainedException;

    public abstract void initialize(Object[] arguments) throws MaltChainedException;

    public abstract Class<?>[] getParameterTypes();

    public String getSymbol(int value) throws MaltChainedException {
        return column.getSymbolTable().getSymbolCodeToString(value);
    }

    public int getCode(String value) throws MaltChainedException {
        return column.getSymbolTable().getSymbolStringToCode(value);
    }

    public ColumnDescription getColumn() {
        return column;
    }

    protected void setColumn(ColumnDescription column) {
        this.column = column;
    }

    public void setFeatureValue(int indexCode) throws MaltChainedException {
        final String symbol = column.getSymbolTable().getSymbolCodeToString(indexCode);

        if (symbol == null) {
            featureValue.update(indexCode, column.getSymbolTable().getNullValueSymbol(NullValueId.NO_NODE), true, 1);
        } else {
            boolean nullValue = column.getSymbolTable().isNullValue(indexCode);
            if (column.getType() == ColumnDescription.STRING || nullValue) {
                featureValue.update(indexCode, symbol, nullValue, 1);
            } else {
                castFeatureValue(symbol);
            }
        }
    }

    public void setFeatureValue(String symbol) throws MaltChainedException {
        final int indexCode = column.getSymbolTable().getSymbolStringToCode(symbol);
        if (indexCode < 0) {
            featureValue.update(column.getSymbolTable().getNullValueCode(NullValueId.NO_NODE), symbol, true, 1);
        } else {
            boolean nullValue = column.getSymbolTable().isNullValue(symbol);
            if (column.getType() == ColumnDescription.STRING || nullValue) {
                featureValue.update(indexCode, symbol, nullValue, 1);
            } else {
                castFeatureValue(symbol);
            }
        }
    }

    protected void castFeatureValue(String symbol) throws MaltChainedException {
        if (column.getType() == ColumnDescription.INTEGER) {
            try {
                final int dotIndex = symbol.indexOf('.');
                if (dotIndex == -1) {
                    featureValue.setValue(Integer.parseInt(symbol));
                    featureValue.setSymbol(symbol);
                } else {
                    featureValue.setValue(Integer.parseInt(symbol.substring(0, dotIndex)));
                    featureValue.setSymbol(symbol.substring(0, dotIndex));
                }
            } catch (NumberFormatException e) {
                throw new FeatureException("Could not cast the feature value '" + symbol + "' to integer value.", e);
            }
        } else if (column.getType() == ColumnDescription.BOOLEAN) {
            final int dotIndex = symbol.indexOf('.');
            if (symbol.equals("1") || symbol.equals("true") || symbol.equals("#true#") || (dotIndex != -1 && symbol.substring(0, dotIndex).equals("1"))) {
                featureValue.setValue(1);
                featureValue.setSymbol("true");
            } else if (symbol.equals("false") || symbol.equals("0") || (dotIndex != -1 && symbol.substring(0, dotIndex).equals("0"))) {
                featureValue.setValue(0);
                featureValue.setSymbol("false");
            } else {
                throw new FeatureException("Could not cast the feature value '" + symbol + "' to boolean value.");
            }
        } else if (column.getType() == ColumnDescription.REAL) {
            try {
                featureValue.setValue(Double.parseDouble(symbol));
                featureValue.setSymbol(symbol);
            } catch (NumberFormatException e) {
                throw new FeatureException("Could not cast the feature value '" + symbol + "' to real value.", e);
            }
        }
        if (column.getType() == ColumnDescription.INTEGER || column.getType() == ColumnDescription.BOOLEAN || column.getType() == ColumnDescription.REAL) {
            featureValue.setNullValue(false);
            featureValue.setIndexCode(1);
        }
    }

    public FeatureValue getFeatureValue() {
        return featureValue;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        return obj.toString().equals(this.toString());
    }

    public String getColumnName() {
        return column.getName();
    }

    public SymbolTable getSymbolTable() {
        return column.getSymbolTable();
    }

    public int getType() {
        return column.getType();
    }

    public String getMapIdentifier() {
        return getSymbolTable().getName();
    }

    @Override
    public String toString() {
        return column.getName();
    }
}