Revision 44139 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/DefaultCompiler.java
| DefaultCompiler.java | ||
|---|---|---|
| 1 | 1 |
package org.gvsig.expressionevaluator.impl; |
| 2 | 2 |
|
| 3 |
import java.util.HashMap; |
|
| 4 |
import java.util.Map; |
|
| 5 |
import org.apache.commons.lang3.StringUtils; |
|
| 3 | 6 |
import org.gvsig.expressionevaluator.Compiler; |
| 4 |
import org.gvsig.expressionevaluator.Code.Caller.Arguments; |
|
| 5 | 7 |
import org.gvsig.expressionevaluator.LexicalAnalyzer; |
| 6 | 8 |
import org.gvsig.expressionevaluator.LexicalAnalyzer.Token; |
| 7 | 9 |
import org.gvsig.expressionevaluator.Code; |
| 8 | 10 |
import org.gvsig.expressionevaluator.CodeBuilder; |
| 11 |
import org.gvsig.expressionevaluator.Codes; |
|
| 9 | 12 |
import org.gvsig.expressionevaluator.ExpressionSyntaxException; |
| 13 |
import org.gvsig.expressionevaluator.GrammarSet; |
|
| 14 |
import org.gvsig.expressionevaluator.Statement; |
|
| 15 |
import org.gvsig.expressionevaluator.Statement.StatementContext; |
|
| 16 |
import org.gvsig.expressionevaluator.impl.DefaultCodeBuilder.BaseCodes; |
|
| 10 | 17 |
|
| 11 | 18 |
public class DefaultCompiler implements Compiler {
|
| 12 | 19 |
|
| 20 |
class DefaultStatementContext implements StatementContext {
|
|
| 21 |
|
|
| 22 |
private String codeClassifier; |
|
| 23 |
private Map<String,Code> codes; |
|
| 24 |
|
|
| 25 |
@Override |
|
| 26 |
public Compiler getCompiler() {
|
|
| 27 |
return DefaultCompiler.this; |
|
| 28 |
} |
|
| 29 |
|
|
| 30 |
@Override |
|
| 31 |
public LexicalAnalyzer getLexicalAnalyzer() {
|
|
| 32 |
return lexer; |
|
| 33 |
} |
|
| 34 |
|
|
| 35 |
@Override |
|
| 36 |
public void setCode(String id, Code code) {
|
|
| 37 |
if( this.codes == null ) {
|
|
| 38 |
this.codes = new HashMap<>(); |
|
| 39 |
} |
|
| 40 |
if( !StringUtils.isBlank(this.codeClassifier) ) {
|
|
| 41 |
if( id.contains("#") ) {
|
|
| 42 |
id = StringUtils.replace(id,"#",this.codeClassifier,1); |
|
| 43 |
} |
|
| 44 |
} |
|
| 45 |
this.codes.put(id, code); |
|
| 46 |
} |
|
| 47 |
|
|
| 48 |
public Code getCode(String id) {
|
|
| 49 |
return this.codes.get(id); |
|
| 50 |
} |
|
| 51 |
|
|
| 52 |
@Override |
|
| 53 |
public void setCodeClassifier(String classifier) {
|
|
| 54 |
this.codeClassifier = classifier; |
|
| 55 |
} |
|
| 56 |
|
|
| 57 |
@Override |
|
| 58 |
public String getCodeClassifier() {
|
|
| 59 |
return this.codeClassifier; |
|
| 60 |
} |
|
| 61 |
|
|
| 62 |
@Override |
|
| 63 |
public CodeBuilder getCodeBuilder() {
|
|
| 64 |
return codeBuilder; |
|
| 65 |
} |
|
| 66 |
|
|
| 67 |
@Override |
|
| 68 |
public Token look_token() {
|
|
| 69 |
return lexer.look(); |
|
| 70 |
} |
|
| 71 |
|
|
| 72 |
@Override |
|
| 73 |
public Token next_token() {
|
|
| 74 |
return lexer.next(); |
|
| 75 |
} |
|
| 76 |
|
|
| 77 |
@Override |
|
| 78 |
public Code parse_expression() {
|
|
| 79 |
return DefaultCompiler.this.parse_expression(); |
|
| 80 |
} |
|
| 81 |
|
|
| 82 |
@Override |
|
| 83 |
public Codes parse_expressions(String separator) {
|
|
| 84 |
return DefaultCompiler.this.parse_expressions(separator); |
|
| 85 |
} |
|
| 86 |
|
|
| 87 |
} |
|
| 88 |
|
|
| 13 | 89 |
private boolean objectAccessSupported; |
| 14 | 90 |
private LexicalAnalyzer lexer; |
| 15 | 91 |
private CodeBuilder codeBuilder; |
| 92 |
private final GrammarSet grammars; |
|
| 16 | 93 |
// |
| 17 | 94 |
// https://www.postgresql.org/docs/9.1/static/functions.html |
| 18 | 95 |
// |
| 19 | 96 |
|
| 20 | 97 |
public DefaultCompiler() {
|
| 98 |
this.grammars = new DefaultGrammarSet(); |
|
| 21 | 99 |
this.lexer = new SQLLexicalAnalyzer(); |
| 22 | 100 |
this.codeBuilder = new DefaultCodeBuilder(); |
| 23 | 101 |
this.objectAccessSupported = true; |
| ... | ... | |
| 61 | 139 |
public void setObjectAccessSupported(boolean objectAccessSupported) {
|
| 62 | 140 |
this.objectAccessSupported = objectAccessSupported; |
| 63 | 141 |
} |
| 64 |
|
|
| 142 |
|
|
| 65 | 143 |
@Override |
| 144 |
public GrammarSet getGrammars() {
|
|
| 145 |
return this.grammars; |
|
| 146 |
} |
|
| 147 |
|
|
| 148 |
@Override |
|
| 66 | 149 |
public Code compileExpression(String expression) {
|
| 67 | 150 |
this.lexer.setSource(expression.trim()); |
| 68 |
Code code = parseExpression();
|
|
| 151 |
Code code = parse_expression();
|
|
| 69 | 152 |
if( !this.lexer.isEOF() ) {
|
| 70 | 153 |
throw new ExpressionSyntaxException(lexer); |
| 71 | 154 |
} |
| 72 | 155 |
return code; |
| 73 | 156 |
} |
| 74 | 157 |
|
| 75 |
private Code parseExpression() {
|
|
| 158 |
public Code parse_expression() {
|
|
| 76 | 159 |
Code code = parse_relational(); |
| 77 | 160 |
return code; |
| 78 | 161 |
} |
| 79 | 162 |
|
| 80 |
private Code parse_relational() {
|
|
| 163 |
public Code parse_relational() {
|
|
| 81 | 164 |
Code op1 = parse_not(); |
| 82 | 165 |
Code op2; |
| 83 | 166 |
while( true ) {
|
| ... | ... | |
| 105 | 188 |
} |
| 106 | 189 |
} |
| 107 | 190 |
|
| 108 |
private Code parse_not() {
|
|
| 191 |
public Code parse_not() {
|
|
| 109 | 192 |
Code op1; |
| 110 | 193 |
Token token = lexer.look(); |
| 111 | 194 |
if( token.getType() == Token.OP_NOT ) {
|
| ... | ... | |
| 118 | 201 |
return op1; |
| 119 | 202 |
} |
| 120 | 203 |
|
| 121 |
private Code parse_conditional() {
|
|
| 204 |
public Code parse_conditional() {
|
|
| 122 | 205 |
Code op1 = parse_sum(); |
| 123 | 206 |
Code op2; |
| 124 | 207 |
while( true ) {
|
| ... | ... | |
| 160 | 243 |
lexer.next(); |
| 161 | 244 |
op2 = parse_sum(); |
| 162 | 245 |
if( op2==null ) {
|
| 163 |
throw new ExpressionSyntaxException(I18N.Cant_recognize_the_second_operand_of_EQ_operator(),lexer); |
|
| 246 |
token = lexer.look(); |
|
| 247 |
String tip = null; |
|
| 248 |
switch(token.getType()) {
|
|
| 249 |
case Token.OP_GT: |
|
| 250 |
tip = I18N.The_operator_greater_than_or_equal_is_ge(); |
|
| 251 |
break; |
|
| 252 |
case Token.OP_LT: |
|
| 253 |
tip = I18N.The_operator_less_than_or_equal_is_ge(); |
|
| 254 |
break; |
|
| 255 |
} |
|
| 256 |
throw new ExpressionSyntaxException( |
|
| 257 |
I18N.Cant_recognize_the_second_operand_of_EQ_operator(), |
|
| 258 |
lexer, |
|
| 259 |
tip |
|
| 260 |
); |
|
| 164 | 261 |
} |
| 165 | 262 |
op1 = codeBuilder.eq(op1, op2); |
| 166 | 263 |
break; |
| ... | ... | |
| 221 | 318 |
} |
| 222 | 319 |
} |
| 223 | 320 |
|
| 224 |
private Code parse_sum() {
|
|
| 321 |
public Code parse_sum() {
|
|
| 225 | 322 |
Code op1 = parse_factor(); |
| 226 | 323 |
Code op2; |
| 227 | 324 |
while( true ) {
|
| 228 | 325 |
Token token = lexer.look(); |
| 229 | 326 |
switch( token.getType() ) {
|
| 327 |
case Token.OP_CONCAT: |
|
| 328 |
lexer.next(); |
|
| 329 |
op2 = parse_factor(); |
|
| 330 |
op1 = codeBuilder.concat(op1, op2); |
|
| 331 |
break; |
|
| 230 | 332 |
case Token.OP_ADD: |
| 231 | 333 |
lexer.next(); |
| 232 | 334 |
op2 = parse_factor(); |
| ... | ... | |
| 243 | 345 |
} |
| 244 | 346 |
} |
| 245 | 347 |
|
| 246 |
private Code parse_factor() {
|
|
| 348 |
public Code parse_factor() {
|
|
| 247 | 349 |
Code op1 = parse_getattr(); |
| 248 | 350 |
Code op2; |
| 249 | 351 |
while( true ) {
|
| ... | ... | |
| 273 | 375 |
} |
| 274 | 376 |
op1 = codeBuilder.mod(op1, op2); |
| 275 | 377 |
break; |
| 378 |
case Token.OPEN_BRACKET: |
|
| 379 |
lexer.next(); |
|
| 380 |
Code codeIndex = parse_expression(); |
|
| 381 |
if( codeIndex == null ) {
|
|
| 382 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
|
| 383 |
} |
|
| 384 |
token = lexer.look(); |
|
| 385 |
if( token.getType()!=Token.CLOSED_BRACKET) {
|
|
| 386 |
throw new ExpressionSyntaxException(I18N.A_XTokenX_was_expected_and_XliteralX_was_found("]", token.getLiteral()),lexer);
|
|
| 387 |
} |
|
| 388 |
lexer.next(); |
|
| 389 |
Code code = codeBuilder.getitem(op1, codeIndex); |
|
| 390 |
return code; |
|
| 276 | 391 |
default: |
| 277 | 392 |
return op1; |
| 278 | 393 |
} |
| 279 | 394 |
} |
| 280 | 395 |
} |
| 281 | 396 |
|
| 282 |
private Code parse_getattr() {
|
|
| 397 |
public Code parse_getattr() {
|
|
| 283 | 398 |
Code op1 = parse_termino(); |
| 284 | 399 |
if( !isObjectAccessSupported() ) {
|
| 285 | 400 |
return op1; |
| ... | ... | |
| 301 | 416 |
next = lexer.look(); |
| 302 | 417 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
| 303 | 418 |
lexer.next(); |
| 304 |
Arguments args = parseArgs();
|
|
| 419 |
Codes args = parse_expressions(",");
|
|
| 305 | 420 |
next = lexer.next(); |
| 306 | 421 |
if( next.getType() != Token.PARENTHESIS_CLOSE ) {
|
| 307 | 422 |
throw new ExpressionSyntaxException( |
| ... | ... | |
| 319 | 434 |
} |
| 320 | 435 |
} |
| 321 | 436 |
|
| 322 |
private Code parse_termino() {
|
|
| 437 |
public Code parse_termino() {
|
|
| 323 | 438 |
|
| 324 | 439 |
Token token = lexer.look(); |
| 325 | 440 |
switch( token.getType() ) {
|
| 326 | 441 |
case Token.PARENTHESIS_OPEN: {
|
| 327 | 442 |
lexer.next(); |
| 328 |
Code value = parseExpression();
|
|
| 443 |
Code value = parse_expression();
|
|
| 329 | 444 |
Token next = lexer.next(); |
| 330 | 445 |
switch(next.getType()) {
|
| 331 | 446 |
case Token.PARENTHESIS_CLOSE: |
| ... | ... | |
| 344 | 459 |
return value; |
| 345 | 460 |
} |
| 346 | 461 |
case Token.IDENTIFIER: {
|
| 462 |
Code code = parse_grammars(); |
|
| 463 |
if( code!=null ) {
|
|
| 464 |
return code; |
|
| 465 |
} |
|
| 466 |
if( this.grammars.isReservedWord(token.getLiteral()) ) {
|
|
| 467 |
return null; |
|
| 468 |
} |
|
| 347 | 469 |
lexer.next(); |
| 348 | 470 |
String id = (String) token.getLiteral(); |
| 349 | 471 |
Token next = lexer.look(); |
| 350 | 472 |
if( next.getType() == Token.PARENTHESIS_OPEN ) {
|
| 351 | 473 |
lexer.next(); |
| 352 |
Arguments args = parseArgs();
|
|
| 474 |
Codes args = parse_expressions(",");
|
|
| 353 | 475 |
next = lexer.next(); |
| 354 | 476 |
switch(next.getType()) {
|
| 355 | 477 |
case Token.PARENTHESIS_CLOSE: |
| ... | ... | |
| 394 | 516 |
return codeBuilder.negate(code); |
| 395 | 517 |
case Token.EOF: |
| 396 | 518 |
throw new ExpressionSyntaxException(I18N.unexpected_end_of_source(),lexer); |
| 519 |
default: |
|
| 520 |
return parse_grammars(); |
|
| 397 | 521 |
} |
| 398 |
return null; |
|
| 399 | 522 |
} |
| 400 | 523 |
|
| 401 |
private Arguments parseArgs() {
|
|
| 402 |
Arguments args = null;
|
|
| 524 |
public Codes parse_expressions(String sep) {
|
|
| 525 |
BaseCodes codes = null;
|
|
| 403 | 526 |
while( true ) {
|
| 404 |
Code arg = parseExpression();
|
|
| 405 |
if( arg!=null ) {
|
|
| 406 |
if( args == null ) {
|
|
| 407 |
args = codeBuilder.args();
|
|
| 527 |
Code code = parse_expression();
|
|
| 528 |
if( code!=null ) {
|
|
| 529 |
if( codes == null ) {
|
|
| 530 |
codes = (BaseCodes) codeBuilder.args();
|
|
| 408 | 531 |
} |
| 409 |
((DefaultCodeBuilder.BaseArguments)args).add(arg);
|
|
| 532 |
codes.add(code);
|
|
| 410 | 533 |
} |
| 411 | 534 |
Token next = lexer.look(); |
| 412 |
switch( next.getType() ) {
|
|
| 413 |
case Token.COMA: |
|
| 535 |
String literal = next.getLiteral(); |
|
| 536 |
if( literal == null ) {
|
|
| 537 |
return codes; |
|
| 538 |
} |
|
| 539 |
literal = literal.trim(); |
|
| 540 |
if( sep.equals(literal) ) {
|
|
| 414 | 541 |
lexer.next(); // Consume el ",". |
| 415 |
break; |
|
| 416 |
default: |
|
| 417 |
return args; |
|
| 542 |
} else {
|
|
| 543 |
return codes; |
|
| 418 | 544 |
} |
| 419 | 545 |
} |
| 420 | 546 |
} |
| 547 |
|
|
| 548 |
private Code parse_grammars() {
|
|
| 549 |
StatementContext context = new DefaultStatementContext(); |
|
| 550 |
Statement stmt = this.grammars.getApplicableStatement(context); |
|
| 551 |
if( stmt!=null ) {
|
|
| 552 |
Code code1 = stmt.parse(context); |
|
| 553 |
return code1; |
|
| 554 |
} |
|
| 555 |
return null; |
|
| 556 |
} |
|
| 421 | 557 |
} |
Also available in: Unified diff