001    package org.maltparser.core.feature;
002    
003    
004    import java.util.ArrayList;
005    import java.util.Stack;
006    import java.util.regex.Pattern;
007    
008    import org.maltparser.core.config.ConfigurationRegistry;
009    import org.maltparser.core.exception.MaltChainedException;
010    import org.maltparser.core.feature.function.AddressFunction;
011    import org.maltparser.core.feature.function.FeatureFunction;
012    import org.maltparser.core.feature.function.Function;
013    import org.maltparser.core.feature.spec.SpecificationModel;
014    import org.maltparser.core.feature.spec.SpecificationSubModel;
015    import org.maltparser.core.feature.system.FeatureEngine;
016    import org.maltparser.core.helper.HashMap;
017    
018    /**
019    *
020    *
021    * @author Johan Hall
022    */
023    public class FeatureModel extends HashMap<String, FeatureVector> {
024            public final static long serialVersionUID = 3256444702936019250L;
025            protected SpecificationModel specModel;
026            protected final ArrayList<AddressFunction> addressFunctionCache;
027            protected final ArrayList<FeatureFunction> featureFunctionCache;
028            protected ConfigurationRegistry registry;
029            protected FeatureEngine featureEngine;
030            protected FeatureVector mainFeatureVector = null; 
031            protected final Pattern splitPattern;
032            
033            public FeatureModel(SpecificationModel specModel, ConfigurationRegistry registry, FeatureEngine engine) throws MaltChainedException {
034                    setSpecModel(specModel);
035                    setRegistry(registry);
036                    setFeatureEngine(engine);
037                    addressFunctionCache = new ArrayList<AddressFunction>();
038                    featureFunctionCache = new ArrayList<FeatureFunction>();
039                    splitPattern = Pattern.compile("\\(|\\)|\\[|\\]|,");
040                    for (SpecificationSubModel subModel : specModel) {
041                            FeatureVector fv = new FeatureVector(this, subModel);
042                            if (mainFeatureVector == null) {
043                                    if (subModel.getSubModelName().equals("MAIN")) {
044                                            mainFeatureVector = fv;
045                                    } else {
046                                            mainFeatureVector = fv;
047                                            put(subModel.getSubModelName(), fv);
048                                    }
049                            } else {
050                                    put(subModel.getSubModelName(), fv);
051                            }
052                    }
053            }
054    
055            public SpecificationModel getSpecModel() {
056                    return specModel;
057            }
058    
059            public void setSpecModel(SpecificationModel specModel) {
060                    this.specModel = specModel;
061            }
062            
063            public ArrayList<AddressFunction> getAddressFunctionCache() {
064                    return addressFunctionCache;
065            }
066    
067            public ArrayList<FeatureFunction> getFeatureFunctionCache() {
068                    return featureFunctionCache;
069            }
070            
071            public ConfigurationRegistry getRegistry() {
072                    return registry;
073            }
074    
075            public void setRegistry(ConfigurationRegistry registry) {
076                    this.registry = registry;
077            }
078    
079            public FeatureEngine getFeatureEngine() {
080                    return featureEngine;
081            }
082    
083            public void setFeatureEngine(FeatureEngine featureEngine) {
084                    this.featureEngine = featureEngine;
085            }
086            
087            public FeatureVector getMainFeatureVector() {
088                    return mainFeatureVector;
089            }
090            
091            public FeatureVector getFeatureVector(String subModelName) {
092                    return get(subModelName);
093            }
094            
095            public void update() throws MaltChainedException {
096                    for (int i = 0, n = addressFunctionCache.size(); i < n; i++) {
097                            addressFunctionCache.get(i).update();
098                    }
099                    
100                    for (int i = 0, n = featureFunctionCache.size(); i < n; i++) {
101                            featureFunctionCache.get(i).update();
102                    }
103            }
104            
105            public void update(Object[] arguments) throws MaltChainedException {
106                    for (int i = 0, n = addressFunctionCache.size(); i < n; i++) {
107                            addressFunctionCache.get(i).update(arguments);
108                    }
109                    
110                    for (int i = 0, n = featureFunctionCache.size(); i < n; i++) {
111                            featureFunctionCache.get(i).update();
112                    }
113            }
114            
115            public FeatureFunction identifyFeature(String spec) throws MaltChainedException {
116                    String[] items =splitPattern.split(spec);
117                    Stack<Object> objects = new Stack<Object>();
118                    for (int i = items.length-1; i >= 0; i--) {
119                            if (items[i].trim().length() != 0) {
120                                    objects.push(items[i].trim());
121                            }
122                    }
123                    identifyFeatureFunction(objects);
124                    if (objects.size() != 1 || !(objects.peek() instanceof FeatureFunction) || (objects.peek() instanceof AddressFunction)) {
125                            throw new FeatureException("The feature specification '"+spec+"' were not recognized properly. ");
126                    }
127                    return (FeatureFunction)objects.pop();
128            }
129            
130            protected void identifyFeatureFunction(Stack<Object> objects) throws MaltChainedException {
131                    Function function = featureEngine.newFunction(objects.peek().toString(), registry);
132                    if (function != null) {
133                            objects.pop();
134                            if (!objects.isEmpty()) {
135                                    identifyFeatureFunction(objects);
136                            }
137                            initializeFunction(function, objects);
138                    } else {
139                            if (!objects.isEmpty()) {
140                                    Object o = objects.pop();
141                                    if (!objects.isEmpty()) {
142                                            identifyFeatureFunction(objects);
143                                    }
144                                    objects.push(o);
145                            }
146                    }
147            }
148            
149            protected void initializeFunction(Function function, Stack<Object> objects) throws MaltChainedException {
150                    Class<?>[] paramTypes = function.getParameterTypes();
151                    Object[] arguments = new Object[paramTypes.length];
152                    for (int i = 0; i < paramTypes.length; i++) {
153                            if (paramTypes[i] == java.lang.Integer.class) {
154                                    if (objects.peek() instanceof String) {
155                                            String object = (String)objects.pop();
156                                            try {
157                                                    objects.push(Integer.parseInt(object));
158                                            } catch (NumberFormatException e) {
159                                                    throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+object+"'" + ", expect an integer value. ", e);
160                                            }
161                                    } else {
162                                            throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+objects.peek()+"'" + ", expect an integer value. ");
163                                    }
164                            } else if (paramTypes[i] == java.lang.Double.class) {
165                                    if (objects.peek() instanceof String) {
166                                            String object = (String)objects.pop();
167                                            try {
168                                                    objects.push(Double.parseDouble(object));
169                                            } catch (NumberFormatException e) {
170                                                    throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+object+"'" + ", expect a numeric value. ", e);
171                                            }
172                                    } else {
173                                            throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+objects.peek()+"'" + ", expect a numeric value. ");
174                                    }
175                            } else if (paramTypes[i] == java.lang.Boolean.class) {
176                                    if (objects.peek() instanceof String) {
177                                            objects.push(Boolean.parseBoolean(((String)objects.pop())));
178                                    } else {
179                                            throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+objects.peek()+"'" + ", expect a boolean value. ");
180                                            
181                                    }
182                            }
183                            if (!paramTypes[i].isInstance(objects.peek())) {
184                                    throw new FeatureException("The function '"+function.getClass()+"' cannot be initialized with argument '"+objects.peek()+"'");
185                            }
186                            arguments[i] = objects.pop();
187                    }
188                    function.initialize(arguments);
189                    if (function instanceof AddressFunction) {
190                            int index = getAddressFunctionCache().indexOf(function);
191                            if (index != -1) {
192                                    function = getAddressFunctionCache().get(index);
193                            } else {
194                                    getAddressFunctionCache().add((AddressFunction)function);
195                            }
196                    } else if (function instanceof FeatureFunction) {
197                            int index = getFeatureFunctionCache().indexOf(function);
198                            if (index != -1) {
199                                    function = getFeatureFunctionCache().get(index);
200                            } else {
201                                    getFeatureFunctionCache().add((FeatureFunction)function);
202                            }
203                    }
204                    objects.push(function);
205            }
206            
207            public String toString() {
208                    return specModel.toString();
209            }
210    }