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.SyntaxGraphException;
016 import org.maltparser.core.syntaxgraph.node.DependencyNode;
017 /**
018 *
019 * @author Johan Hall
020 * @since 1.1
021 **/
022 public class InputArcFeature implements FeatureFunction {
023 protected AddressFunction addressFunction1;
024 protected AddressFunction addressFunction2;
025 protected ColumnDescription column;
026 protected DataFormatInstance dataFormatInstance;
027 protected SymbolTableHandler tableHandler;
028 protected SymbolTable table;
029 protected SingleFeatureValue featureValue;
030
031
032 public InputArcFeature(DataFormatInstance dataFormatInstance, SymbolTableHandler tableHandler) throws MaltChainedException {
033 super();
034 setDataFormatInstance(dataFormatInstance);
035 setTableHandler(tableHandler);
036 setFeatureValue(new SingleFeatureValue(this));
037 }
038
039 public void initialize(Object[] arguments) throws MaltChainedException {
040 if (arguments.length != 3) {
041 throw new FeatureException("Could not initialize InputArcFeature: number of arguments are not correct. ");
042 }
043 // Checks that the two arguments are address functions
044
045 if (!(arguments[0] instanceof String)) {
046 throw new FeatureException("Could not initialize InputArcFeature: the first argument is not a string. ");
047 }
048 if (!(arguments[1] instanceof AddressFunction)) {
049 throw new SyntaxGraphException("Could not initialize InputArcFeature: the second argument is not an address function. ");
050 }
051 if (!(arguments[2] instanceof AddressFunction)) {
052 throw new SyntaxGraphException("Could not initialize InputArcFeature: the third argument is not an address function. ");
053 }
054 setAddressFunction1((AddressFunction)arguments[1]);
055 setAddressFunction2((AddressFunction)arguments[2]);
056
057 setColumn(dataFormatInstance.getColumnDescriptionByName((String)arguments[0]));
058 setSymbolTable(tableHandler.addSymbolTable("ARC_"+column.getName(),ColumnDescription.INPUT, "one"));
059 table.addSymbol("LEFT");
060 table.addSymbol("RIGHT");
061 }
062
063 public Class<?>[] getParameterTypes() {
064 Class<?>[] paramTypes = { java.lang.String.class, org.maltparser.core.feature.function.AddressFunction.class, org.maltparser.core.feature.function.AddressFunction.class };
065 return paramTypes;
066 }
067
068 public int getCode(String symbol) throws MaltChainedException {
069 return table.getSymbolStringToCode(symbol);
070 }
071
072
073 public FeatureValue getFeatureValue() {
074 return featureValue;
075 }
076
077
078 public String getSymbol(int code) throws MaltChainedException {
079 return table.getSymbolCodeToString(code);
080 }
081
082
083 public void updateCardinality() throws MaltChainedException {
084 // featureValue.setCardinality(table.getValueCounter());
085 }
086
087 public void update() throws MaltChainedException {
088 // Retrieve the address value
089 final AddressValue arg1 = addressFunction1.getAddressValue();
090 final AddressValue arg2 = addressFunction2.getAddressValue();
091 if (arg1.getAddress() != null && arg1.getAddressClass() == org.maltparser.core.syntaxgraph.node.DependencyNode.class &&
092 arg2.getAddress() != null && arg2.getAddressClass() == org.maltparser.core.syntaxgraph.node.DependencyNode.class) {
093 DependencyNode node1 = (DependencyNode)arg1.getAddress();
094 DependencyNode node2 = (DependencyNode)arg2.getAddress();
095 try {
096 int head1 = Integer.parseInt(node1.getLabelSymbol(column.getSymbolTable()));
097 int head2 = Integer.parseInt(node2.getLabelSymbol(column.getSymbolTable()));
098 if (!node1.isRoot() && head1 == node2.getIndex()) {
099 featureValue.setIndexCode(table.getSymbolStringToCode("LEFT"));
100 featureValue.setSymbol("LEFT");
101 featureValue.setNullValue(false);
102 } else if (!node2.isRoot() && head2 == node1.getIndex()) {
103 featureValue.setIndexCode(table.getSymbolStringToCode("RIGHT"));
104 featureValue.setSymbol("RIGHT");
105 featureValue.setNullValue(false);
106 } else {
107 featureValue.setIndexCode(table.getNullValueCode(NullValueId.NO_NODE));
108 featureValue.setSymbol(table.getNullValueSymbol(NullValueId.NO_NODE));
109 featureValue.setNullValue(true);
110 }
111 } catch (NumberFormatException e) {
112 throw new FeatureException("The index of the feature must be an integer value. ", e);
113 }
114 } else {
115 featureValue.setIndexCode(table.getNullValueCode(NullValueId.NO_NODE));
116 featureValue.setSymbol(table.getNullValueSymbol(NullValueId.NO_NODE));
117 featureValue.setNullValue(true);
118 }
119 // featureValue.setKnown(true);
120 featureValue.setValue(1);
121 }
122
123 public ColumnDescription getColumn() {
124 return column;
125 }
126
127 public void setColumn(ColumnDescription column) throws MaltChainedException {
128 if (column.getType() != ColumnDescription.INTEGER) {
129 throw new FeatureException("InputArc feature column must be of type integer. ");
130 }
131 this.column = column;
132 }
133
134 /**
135 * Returns the address function 1 (argument 1)
136 *
137 * @return the address function 1 (argument 1)
138 */
139 public AddressFunction getAddressFunction1() {
140 return addressFunction1;
141 }
142
143
144 /**
145 * Sets the address function 1 (argument 1)
146 *
147 * @param addressFunction1 a address function 1 (argument 1)
148 */
149 public void setAddressFunction1(AddressFunction addressFunction1) {
150 this.addressFunction1 = addressFunction1;
151 }
152
153 /**
154 * Returns the address function 2 (argument 2)
155 *
156 * @return the address function 1 (argument 2)
157 */
158 public AddressFunction getAddressFunction2() {
159 return addressFunction2;
160 }
161
162 /**
163 * Sets the address function 2 (argument 2)
164 *
165 * @param addressFunction2 a address function 2 (argument 2)
166 */
167 public void setAddressFunction2(AddressFunction addressFunction2) {
168 this.addressFunction2 = addressFunction2;
169 }
170
171 public DataFormatInstance getDataFormatInstance() {
172 return dataFormatInstance;
173 }
174
175 public void setDataFormatInstance(DataFormatInstance dataFormatInstance) {
176 this.dataFormatInstance = dataFormatInstance;
177 }
178
179 public void setFeatureValue(SingleFeatureValue featureValue) {
180 this.featureValue = featureValue;
181 }
182
183 public SymbolTable getSymbolTable() {
184 return table;
185 }
186
187 public void setSymbolTable(SymbolTable table) {
188 this.table = table;
189 }
190
191 public SymbolTableHandler getTableHandler() {
192 return tableHandler;
193 }
194
195 public void setTableHandler(SymbolTableHandler tableHandler) {
196 this.tableHandler = tableHandler;
197 }
198
199 public boolean equals(Object obj) {
200 if (!(obj instanceof InputArcFeature)) {
201 return false;
202 }
203 if (!obj.toString().equals(this.toString())) {
204 return false;
205 }
206 return true;
207 }
208
209 public String toString() {
210 return "InputArc(" + column.getName() + ")";
211 }
212 }