Revision 43939 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 | ||
|---|---|---|
| 9 | 9 |
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| 10 | 10 |
public class DefaultCompiler implements Compiler {
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| 11 | 11 |
|
| 12 |
private boolean objectAccessSupported; |
|
| 12 | 13 |
private LexicalAnalyzer lexer; |
| 13 | 14 |
private CodeBuilder codeBuilder; |
| 14 | 15 |
// |
| ... | ... | |
| 18 | 19 |
public DefaultCompiler() {
|
| 19 | 20 |
this.lexer = new SQLLexicalAnalyzer(); |
| 20 | 21 |
this.codeBuilder = new DefaultCodeBuilder(); |
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this.objectAccessSupported = true; |
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} |
| 22 | 24 |
|
| 23 | 25 |
@Override |
| ... | ... | |
| 45 | 47 |
} |
| 46 | 48 |
|
| 47 | 49 |
@Override |
| 50 |
public boolean isObjectAccessSupported() {
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return this.objectAccessSupported; |
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} |
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@Override |
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public void setObjectAccessSupported(boolean objectAccessSupported) {
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this.objectAccessSupported = objectAccessSupported; |
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} |
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|
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@Override |
|
| 48 | 60 |
public Code compileExpression(String expression) {
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| 49 | 61 |
this.lexer.setSource(expression); |
| 50 | 62 |
return parseExpression(); |
| ... | ... | |
| 185 | 197 |
} |
| 186 | 198 |
|
| 187 | 199 |
private Code parse_factor() {
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Code op1 = parse_termino();
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Code op1 = parse_getattr();
|
|
| 189 | 201 |
Code op2; |
| 190 | 202 |
while( true ) {
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| 191 | 203 |
Token token = lexer.look(); |
| 192 | 204 |
switch( token.getType() ) {
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| 193 | 205 |
case Token.OP_MULT: |
| 194 | 206 |
lexer.next(); |
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op2 = parse_termino();
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op2 = parse_getattr();
|
|
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op1 = codeBuilder.mult(op1, op2); |
| 197 | 209 |
break; |
| 198 | 210 |
case Token.OP_DIV: |
| 199 | 211 |
lexer.next(); |
| 200 |
op2 = parse_termino();
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|
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op2 = parse_getattr();
|
|
| 201 | 213 |
op1 = codeBuilder.div(op1, op2); |
| 202 | 214 |
break; |
| 203 | 215 |
case Token.OP_MOD: |
| 204 | 216 |
lexer.next(); |
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op2 = parse_termino();
|
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op2 = parse_getattr();
|
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| 206 | 218 |
op1 = codeBuilder.mod(op1, op2); |
| 207 | 219 |
break; |
| 208 | 220 |
default: |
| ... | ... | |
| 211 | 223 |
} |
| 212 | 224 |
} |
| 213 | 225 |
|
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private Code parse_getattr() {
|
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Code op1 = parse_termino(); |
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if( !isObjectAccessSupported() ) {
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return op1; |
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} |
|
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while( true ) {
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Token next = lexer.look(); |
|
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switch( next.getType() ) {
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| 234 |
case Token.OP_GETATTR: |
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lexer.next(); |
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next = lexer.look(); |
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if( next.getType()!=Token.IDENTIFIER ) {
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throw new RuntimeException("An attribute identifier was expected and '"+next.getLiteral()+"' was found");
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} |
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String id = (String) next.getLiteral(); |
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lexer.next(); |
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next = lexer.look(); |
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if( next.getType() == Token.PARENTHESIS_OPEN ) {
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lexer.next(); |
|
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Arguments args = parseArgs(); |
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next = lexer.next(); |
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if( next.getType() != Token.PARENTHESIS_CLOSE ) {
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throw new RuntimeException("Closing parenthesis was expected and '"+next.getLiteral()+"' was found");
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} |
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return codeBuilder.method(op1, id, args); |
|
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} else {
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return codeBuilder.getattr(op1, id); |
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} |
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default: |
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return op1; |
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} |
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} |
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} |
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|
|
| 214 | 260 |
private Code parse_termino() {
|
| 215 | 261 |
|
| 216 | 262 |
Token token = lexer.look(); |
| ... | ... | |
| 220 | 266 |
Code value = parseExpression(); |
| 221 | 267 |
Token next = lexer.next(); |
| 222 | 268 |
if( next.getType() != Token.PARENTHESIS_CLOSE ) {
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throw new RuntimeException(); |
|
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throw new RuntimeException("Closing parenthesis was expected and '"+next.getLiteral()+"' was found");
|
|
| 224 | 270 |
} |
| 225 | 271 |
return value; |
| 226 | 272 |
} |
| ... | ... | |
| 233 | 279 |
Arguments args = parseArgs(); |
| 234 | 280 |
next = lexer.next(); |
| 235 | 281 |
if( next.getType() != Token.PARENTHESIS_CLOSE ) {
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throw new RuntimeException("Expected ')'.");
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throw new RuntimeException("Closing parenthesis was expected and '"+next.getLiteral()+"' was found");
|
|
| 237 | 283 |
} |
| 238 | 284 |
return codeBuilder.function(id, args); |
| 239 | 285 |
} else {
|
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