svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultInterpreter.java @ 45041
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| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl; |
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| 2 | |||
| 3 | 44389 | jjdelcerro | import java.io.OutputStreamWriter; |
| 4 | import java.io.Writer; |
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| 5 | 43532 | jjdelcerro | import java.util.ArrayList; |
| 6 | import java.util.Comparator; |
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| 7 | import java.util.Date; |
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| 8 | import java.util.HashMap; |
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| 9 | import java.util.List; |
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| 10 | import java.util.Map; |
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| 11 | 44191 | jjdelcerro | import java.util.Objects; |
| 12 | 43532 | jjdelcerro | import org.apache.commons.lang3.tuple.Pair; |
| 13 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.SymbolTable; |
| 14 | import org.gvsig.expressionevaluator.Interpreter; |
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| 15 | import org.gvsig.expressionevaluator.Code; |
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| 16 | import org.gvsig.expressionevaluator.Code.Constant; |
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| 17 | import org.gvsig.expressionevaluator.Code.Identifier; |
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| 18 | 43939 | jjdelcerro | import org.gvsig.expressionevaluator.Code.Method; |
| 19 | 44139 | jjdelcerro | import org.gvsig.expressionevaluator.Codes; |
| 20 | 44098 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
| 21 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
| 22 | 44389 | jjdelcerro | import org.gvsig.expressionevaluator.MutableSymbolTable; |
| 23 | 44154 | jjdelcerro | import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.RecursionControlSupport; |
| 24 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.impl.function.operator.BinaryOperator; |
| 25 | import org.gvsig.expressionevaluator.impl.function.operator.UnaryOperator; |
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| 26 | 44139 | jjdelcerro | import org.gvsig.expressionevaluator.impl.function.programming.ReturnFunction.ReturnException; |
| 27 | 44338 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractSymbolTable; |
| 28 | 44389 | jjdelcerro | import org.gvsig.tools.resourcesstorage.ResourcesStorage; |
| 29 | 44752 | jjdelcerro | import org.gvsig.expressionevaluator.Code.Callable; |
| 30 | 43512 | jjdelcerro | |
| 31 | public class DefaultInterpreter implements Interpreter { |
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| 32 | |||
| 33 | 44154 | jjdelcerro | public static int DEFAULT_MAX_RECURSION_LIMIT = 20; |
| 34 | |||
| 35 | 43532 | jjdelcerro | private class DefaultCache implements Cache { |
| 36 | |||
| 37 | private Map<Pair<Object,Object>,Pair<Object,Long>> data; |
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| 38 | |||
| 39 | public DefaultCache() {
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| 40 | this.data = new HashMap<>(); |
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| 41 | } |
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| 42 | |||
| 43 | @Override
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| 44 | public Object get(Object context, Object key) { |
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| 45 | Pair<Object, Long> v = this.data.get( Pair.of(context, key) ); |
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| 46 | 44139 | jjdelcerro | if( v == null ) { |
| 47 | return null; |
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| 48 | } |
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| 49 | 43532 | jjdelcerro | return v.getLeft();
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| 50 | } |
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| 51 | |||
| 52 | @Override
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| 53 | public void put(Object context, Object key, Object value) { |
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| 54 | if( this.data.size()>this.getMaxElements() ) { |
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| 55 | this.reduce();
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| 56 | } |
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| 57 | this.data.put(Pair.of(context, key), Pair.of(value, new Date().getTime())); |
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| 58 | } |
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| 59 | |||
| 60 | @Override
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| 61 | public void remove(Object context, Object key) { |
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| 62 | this.data.remove(Pair.of(context, key));
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| 63 | } |
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| 64 | |||
| 65 | @Override
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| 66 | public void removeAll() { |
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| 67 | this.data = new HashMap<>(); |
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| 68 | } |
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| 69 | |||
| 70 | private int getMaxElements() { |
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| 71 | return 100; |
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| 72 | } |
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| 73 | |||
| 74 | private void reduce() { |
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| 75 | List<Map.Entry<Pair<Object, Object>, Pair<Object, Long>>> entries = |
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| 76 | new ArrayList<>(this.data.entrySet()); |
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| 77 | entries.sort(new Comparator<Map.Entry<Pair<Object, Object>, Pair<Object, Long>>>() { |
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| 78 | @Override
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| 79 | public int compare(Map.Entry<Pair<Object, Object>, Pair<Object, Long>> o1, Map.Entry<Pair<Object, Object>, Pair<Object, Long>> o2) { |
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| 80 | return o1.getValue().getRight().compareTo(o2.getValue().getRight());
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| 81 | } |
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| 82 | }); |
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| 83 | for( int i=0; i<this.getMaxElements()/2; i++ ) { |
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| 84 | this.data.remove(entries.get(i).getKey());
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| 85 | } |
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| 86 | } |
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| 87 | |||
| 88 | } |
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| 89 | |||
| 90 | 43521 | jjdelcerro | private SymbolTable symbolTable = null; |
| 91 | private Double accuracy; |
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| 92 | private Code currentCode;
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| 93 | 43809 | jjdelcerro | private Cache cache;
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| 94 | 44154 | jjdelcerro | private int maxRecursionLimit; |
| 95 | 44191 | jjdelcerro | private boolean sqlCompatible = false; |
| 96 | 44389 | jjdelcerro | private Writer writer ; |
| 97 | private ResourcesStorage resourcesStorage;
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| 98 | 43512 | jjdelcerro | |
| 99 | public DefaultInterpreter() {
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| 100 | 43532 | jjdelcerro | this.cache = new DefaultCache(); |
| 101 | 44154 | jjdelcerro | this.maxRecursionLimit = DEFAULT_MAX_RECURSION_LIMIT;
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| 102 | 44389 | jjdelcerro | this.writer = new OutputStreamWriter(System.out); |
| 103 | this.resourcesStorage = ResourcesStorage.EMPTY_RESOURCESSTORAGE;
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| 104 | 43512 | jjdelcerro | } |
| 105 | |||
| 106 | @Override
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| 107 | 43809 | jjdelcerro | public Interpreter clone() throws CloneNotSupportedException { |
| 108 | DefaultInterpreter other = (DefaultInterpreter) super.clone();
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| 109 | other.cache = new DefaultCache();
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| 110 | if( this.symbolTable!=null ) { |
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| 111 | other.symbolTable = this.symbolTable.clone();
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| 112 | } |
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| 113 | return other;
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| 114 | } |
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| 115 | 44389 | jjdelcerro | |
| 116 | @Override
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| 117 | public ResourcesStorage getResourcesStorage() {
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| 118 | return resourcesStorage;
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| 119 | } |
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| 120 | |||
| 121 | @Override
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| 122 | public void setResourcesStorage(ResourcesStorage resourcesStorage) { |
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| 123 | if( resourcesStorage==null ) { |
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| 124 | this.resourcesStorage = ResourcesStorage.EMPTY_RESOURCESSTORAGE;
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| 125 | } else {
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| 126 | this.resourcesStorage = resourcesStorage;
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| 127 | } |
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| 128 | } |
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| 129 | 44154 | jjdelcerro | |
| 130 | 44338 | jjdelcerro | @Override
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| 131 | 44389 | jjdelcerro | public Writer getWriter() { |
| 132 | return this.writer; |
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| 133 | } |
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| 134 | |||
| 135 | @Override
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| 136 | public void setWriter(Writer writer) { |
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| 137 | if( writer == null ) { |
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| 138 | writer = new OutputStreamWriter(System.out); |
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| 139 | } |
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| 140 | this.writer = writer;
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| 141 | } |
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| 142 | |||
| 143 | @Override
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| 144 | public Object call(SymbolTable symbolTable, String funcname, Object... args) throws Exception { |
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| 145 | 44838 | jjdelcerro | if( this.symbolTable==null ) { |
| 146 | try {
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| 147 | this.symbolTable = symbolTable;
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| 148 | return this.call(funcname, args); |
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| 149 | } finally {
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| 150 | this.symbolTable = null; |
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| 151 | } |
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| 152 | } else {
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| 153 | 44389 | jjdelcerro | SymbolTable savedSymbolTable = this.symbolTable;
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| 154 | try {
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| 155 | symbolTable.addSymbolTable(this.symbolTable);
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| 156 | this.symbolTable = symbolTable;
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| 157 | return this.call(funcname, args); |
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| 158 | } finally {
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| 159 | this.symbolTable = savedSymbolTable;
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| 160 | symbolTable.removeSymbolTable(this.symbolTable);
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| 161 | } |
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| 162 | 44838 | jjdelcerro | } |
| 163 | 44389 | jjdelcerro | } |
| 164 | |||
| 165 | @Override
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| 166 | 44338 | jjdelcerro | public Object call(String function, Object... args) throws Exception { |
| 167 | Function fn = this.symbolTable.function(function);
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| 168 | Object value = fn.call(this, args); |
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| 169 | return value;
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| 170 | } |
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| 171 | |||
| 172 | @Override
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| 173 | public boolean hasFunction(String function) { |
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| 174 | 44389 | jjdelcerro | Function fn = this.getSymbolTable().function(function);
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| 175 | 44338 | jjdelcerro | if( fn == null ) { |
| 176 | return false; |
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| 177 | } |
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| 178 | 44533 | jjdelcerro | // if( fn instanceof AbstractSymbolTable.ScriptFunction ) {
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| 179 | // return false;
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| 180 | // }
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| 181 | 44338 | jjdelcerro | return true; |
| 182 | } |
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| 183 | |||
| 184 | 44154 | jjdelcerro | public int getMaxRecursionLimit() { |
| 185 | return this.maxRecursionLimit; |
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| 186 | } |
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| 187 | 43809 | jjdelcerro | |
| 188 | 44154 | jjdelcerro | public void setMaxRecursionLimit(int limit) { |
| 189 | this.maxRecursionLimit = limit;
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| 190 | } |
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| 191 | |||
| 192 | 43809 | jjdelcerro | @Override
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| 193 | 43532 | jjdelcerro | public Cache getCache() {
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| 194 | return this.cache; |
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| 195 | } |
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| 196 | |||
| 197 | @Override
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| 198 | 43512 | jjdelcerro | public void setSymbolTable(SymbolTable symbolTable) { |
| 199 | this.symbolTable = symbolTable;
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| 200 | } |
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| 201 | |||
| 202 | @Override
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| 203 | public SymbolTable getSymbolTable() {
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| 204 | 43809 | jjdelcerro | if( this.symbolTable==null ) { |
| 205 | 43939 | jjdelcerro | this.symbolTable = new DefaultSymbolTable(); |
| 206 | 43809 | jjdelcerro | } |
| 207 | 43512 | jjdelcerro | return this.symbolTable; |
| 208 | } |
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| 209 | @Override
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| 210 | 43521 | jjdelcerro | public Double getAccuracy() { |
| 211 | return this.accuracy; |
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| 212 | } |
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| 213 | |||
| 214 | @Override
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| 215 | public void setAccuracy(Double accuracy) { |
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| 216 | this.accuracy = accuracy;
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| 217 | } |
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| 218 | 44009 | jjdelcerro | |
| 219 | 43521 | jjdelcerro | @Override
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| 220 | 44191 | jjdelcerro | public void setSQLCompatible(boolean sqlCompatible) { |
| 221 | this.sqlCompatible = sqlCompatible;
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| 222 | } |
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| 223 | |||
| 224 | @Override
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| 225 | public boolean isSQLCompatible() { |
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| 226 | return sqlCompatible;
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| 227 | } |
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| 228 | |||
| 229 | @Override
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| 230 | 44389 | jjdelcerro | public void run(MutableSymbolTable symbolTable, Code code) { |
| 231 | 44838 | jjdelcerro | if( this.symbolTable==null ) { |
| 232 | try {
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| 233 | this.symbolTable = symbolTable;
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| 234 | this.run(code);
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| 235 | } finally {
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| 236 | this.symbolTable = null; |
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| 237 | } |
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| 238 | } else {
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| 239 | 44389 | jjdelcerro | SymbolTable savedSymbolTable = this.symbolTable;
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| 240 | try {
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| 241 | symbolTable.addSymbolTable(this.symbolTable);
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| 242 | this.symbolTable = symbolTable;
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| 243 | this.run(code);
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| 244 | } finally {
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| 245 | this.symbolTable = savedSymbolTable;
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| 246 | symbolTable.removeSymbolTable(this.symbolTable);
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| 247 | } |
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| 248 | 44838 | jjdelcerro | } |
| 249 | 44389 | jjdelcerro | } |
| 250 | |||
| 251 | @Override
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| 252 | 43512 | jjdelcerro | public Object run(Code code) { |
| 253 | try {
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| 254 | return this.runCode(code); |
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| 255 | 44139 | jjdelcerro | } catch(ReturnException ex) {
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| 256 | return ex.getValue();
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| 257 | 44098 | jjdelcerro | } catch(RuntimeException ex) { |
| 258 | throw ex;
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| 259 | } catch(Exception ex) { |
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| 260 | throw new ExpressionRuntimeException(code, "", ex); |
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| 261 | 43512 | jjdelcerro | } |
| 262 | } |
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| 263 | |||
| 264 | @Override
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| 265 | public void link(Code code) { |
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| 266 | 44198 | jjdelcerro | code.link(this.getSymbolTable());
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| 267 | 43512 | jjdelcerro | } |
| 268 | |||
| 269 | 44139 | jjdelcerro | public Object runCode(Code code) throws Exception { |
| 270 | 44154 | jjdelcerro | RecursionControlSupport recursionControl = null;
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| 271 | if( code instanceof RecursionControlSupport ) { |
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| 272 | recursionControl = (RecursionControlSupport) code; |
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| 273 | if( !recursionControl.enterCode(this.maxRecursionLimit) ) { |
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| 274 | recursionControl.resetRecursionState(); |
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| 275 | throw new ExpressionRuntimeException(code, I18N.Maximum_recursion_limit_exceeded()); |
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| 276 | } |
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| 277 | } |
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| 278 | Object value = null; |
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| 279 | 43521 | jjdelcerro | this.currentCode = code;
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| 280 | 44154 | jjdelcerro | try {
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| 281 | switch( code.code() ) {
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| 282 | case Code.CONSTANT:
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| 283 | value = ((Constant) code).value(); |
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| 284 | break;
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| 285 | 43512 | jjdelcerro | |
| 286 | 44154 | jjdelcerro | case Code.IDENTIFIER:
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| 287 | String name = ((Identifier) code).name();
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| 288 | if( !this.getSymbolTable().exists(name) ) { |
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| 289 | throw new ExpressionRuntimeException( |
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| 290 | code, |
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| 291 | I18N.Undefined_variable_XIdentifierX(name), |
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| 292 | I18N.Use_single_quotes_to_enter_literal_strings() |
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| 293 | ); |
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| 294 | } |
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| 295 | value = this.getSymbolTable().value(name);
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| 296 | break;
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| 297 | 43512 | jjdelcerro | |
| 298 | 44154 | jjdelcerro | case Code.METHOD: {
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| 299 | Method method = (Method) code; |
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| 300 | 44243 | jjdelcerro | Codes args = method.parameters(); |
| 301 | int argc = (args == null) ? 0 : args.size(); |
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| 302 | Object[] argvalues = new Object[argc]; |
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| 303 | if( args != null ) { |
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| 304 | int i = 0; |
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| 305 | for( Code arg : args ) {
|
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| 306 | argvalues[i++] = runCode(arg); |
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| 307 | 44154 | jjdelcerro | } |
| 308 | 43939 | jjdelcerro | } |
| 309 | 44243 | jjdelcerro | value = method.call(this, argvalues);
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| 310 | break;
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| 311 | 43939 | jjdelcerro | } |
| 312 | 44752 | jjdelcerro | case Code.CALLABLE:
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| 313 | Callable caller = (Callable) code; |
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| 314 | 44154 | jjdelcerro | Function function = caller.function(); |
| 315 | 43512 | jjdelcerro | if( function == null ) { |
| 316 | 44154 | jjdelcerro | function = this.getSymbolTable().function(caller.name());
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| 317 | if( function == null ) { |
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| 318 | 45025 | jjdelcerro | try {
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| 319 | function = (Function) this.getSymbolTable().value(caller.name());
|
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| 320 | } catch(Exception ex) { |
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| 321 | } |
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| 322 | if( function == null ) { |
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| 323 | throw new ExpressionRuntimeException(code, I18N.Undefined_function_XIdentifierX(caller.name())); |
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| 324 | } |
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| 325 | 44154 | jjdelcerro | } |
| 326 | caller.function(function); |
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| 327 | 43512 | jjdelcerro | } |
| 328 | 44207 | jjdelcerro | // if( !function.isSQLCompatible() && this.sqlCompatible ) {
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| 329 | // throw new ExpressionRuntimeException(code, I18N.Cant_use_non_SQL_compatible_functions(function.name()));
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| 330 | // }
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| 331 | 44198 | jjdelcerro | Codes args = caller.parameters(); |
| 332 | 44154 | jjdelcerro | try {
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| 333 | switch( caller.type() ) {
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| 334 | 44752 | jjdelcerro | case Callable.UNARY_OPERATOR: |
| 335 | 44154 | jjdelcerro | if( args == null || args.size() != 1 ) { |
| 336 | throw new ExpressionRuntimeException(code, I18N.Number_of_argument_mistmatch_in_operator_XIdentifierX_expected_1_got_XargcX(function.name(),args==null?0:args.size())); |
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| 337 | } |
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| 338 | value = ((UnaryOperator) function).call(this, runCode(args.get(0))); |
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| 339 | break;
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| 340 | 43521 | jjdelcerro | |
| 341 | 44752 | jjdelcerro | case Callable.BINARY_OPERATOR: |
| 342 | 44154 | jjdelcerro | if( args == null || args.size() != 2 ) { |
| 343 | throw new ExpressionRuntimeException(code, I18N.Number_of_argument_mistmatch_in_operator_XIdentifierX_expected_2_got_XargcX(function.name(),args==null?0:args.size())); |
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| 344 | } |
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| 345 | value = ((BinaryOperator) function).call(this, runCode(args.get(0)), runCode(args.get(1))); |
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| 346 | break;
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| 347 | 43521 | jjdelcerro | |
| 348 | 44752 | jjdelcerro | case Callable.FUNCTION: |
| 349 | 44154 | jjdelcerro | int argc = (args == null) ? 0 : args.size(); |
| 350 | if( !function.argc().contains(argc) ) {
|
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| 351 | throw new ExpressionRuntimeException(code, I18N.Number_of_argument_mistmatch_in_function_XIdentifierX_expected_XexpectedX_got_XfoundX(function.name(),function.argc(),argc)); |
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| 352 | } |
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| 353 | if( function.useArgumentsInsteadObjects() ) {
|
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| 354 | value = function.call(this, args);
|
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| 355 | } else {
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| 356 | Object[] argvalues = new Object[argc]; |
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| 357 | if( args != null ) { |
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| 358 | int i = 0; |
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| 359 | for( Code arg : args ) {
|
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| 360 | argvalues[i++] = runCode(arg); |
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| 361 | } |
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| 362 | 43939 | jjdelcerro | } |
| 363 | 44154 | jjdelcerro | value = function.call(this, argvalues);
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| 364 | 43521 | jjdelcerro | } |
| 365 | } |
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| 366 | 44154 | jjdelcerro | } catch (RuntimeException ex) { |
| 367 | throw ex;
|
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| 368 | } catch (Exception ex) { |
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| 369 | String argsstr = "???"; |
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| 370 | try {
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| 371 | 44191 | jjdelcerro | argsstr = Objects.toString(args); |
| 372 | 44154 | jjdelcerro | } catch(Exception ex2) { |
| 373 | // Ignore.
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| 374 | } |
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| 375 | 44379 | jjdelcerro | throw new ExpressionRuntimeException(code, I18N.Problems_calling_function_XIdentifierX_with_args_XargsX(function.name(),argsstr), ex); |
| 376 | 43512 | jjdelcerro | } |
| 377 | 44154 | jjdelcerro | break;
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| 378 | |||
| 379 | 43512 | jjdelcerro | } |
| 380 | 44154 | jjdelcerro | } finally {
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| 381 | this.currentCode = null; |
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| 382 | if( recursionControl!=null ) { |
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| 383 | recursionControl.exitCode(); |
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| 384 | } |
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| 385 | 43512 | jjdelcerro | } |
| 386 | return value;
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| 387 | } |
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| 388 | 43521 | jjdelcerro | |
| 389 | @Override
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| 390 | public Code getCurrentCode() {
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| 391 | return this.currentCode; |
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| 392 | } |
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| 393 | 43512 | jjdelcerro | } |