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 / function / operator / ConcatOperator.java @ 44207
History | View | Annotate | Download (2.33 KB)
| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
|---|---|---|---|
| 2 | |||
| 3 | 44139 | jjdelcerro | import java.util.Objects; |
| 4 | import org.apache.commons.lang3.StringUtils; |
||
| 5 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
| 6 | import org.gvsig.expressionevaluator.Code.Caller; |
||
| 7 | import org.gvsig.expressionevaluator.Code.Constant; |
||
| 8 | 44207 | jjdelcerro | import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_CONCAT; |
| 9 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
| 10 | import org.gvsig.expressionevaluator.Interpreter; |
||
| 11 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Optimizer; |
| 12 | import org.gvsig.expressionevaluator.Optimizer.FunctionOptimizer; |
||
| 13 | 43521 | jjdelcerro | |
| 14 | 44139 | jjdelcerro | public class ConcatOperator |
| 15 | 44010 | jjdelcerro | extends AbstractBinaryOperator
|
| 16 | implements FunctionOptimizer
|
||
| 17 | {
|
||
| 18 | 44139 | jjdelcerro | |
| 19 | public ConcatOperator() {
|
||
| 20 | 44207 | jjdelcerro | super(Function.GROUP_STRING, OPERATOR_CONCAT, true); |
| 21 | 43512 | jjdelcerro | } |
| 22 | |||
| 23 | @Override
|
||
| 24 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
| 25 | return true; |
||
| 26 | } |
||
| 27 | |||
| 28 | @Override
|
||
| 29 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object op1, Object op2) { |
| 30 | 44139 | jjdelcerro | return Objects.toString(op1, "")+Objects.toString(op2, ""); |
| 31 | 43512 | jjdelcerro | } |
| 32 | 44010 | jjdelcerro | |
| 33 | @Override
|
||
| 34 | public Code optimize(Optimizer optimizer, Caller caller) {
|
||
| 35 | 44198 | jjdelcerro | Code op1 = optimizer.optimize(caller.parameters().get(0));
|
| 36 | Code op2 = optimizer.optimize(caller.parameters().get(1));
|
||
| 37 | 44010 | jjdelcerro | |
| 38 | if ( op1.code() == Code.CONSTANT && op2.code() == Code.CONSTANT) {
|
||
| 39 | Code newCode = optimizer.getCodeBuilder().constant( |
||
| 40 | call( |
||
| 41 | optimizer.getInterpreter(), |
||
| 42 | ((Constant)op1).value(), |
||
| 43 | ((Constant)op2).value() |
||
| 44 | ) |
||
| 45 | ); |
||
| 46 | return newCode;
|
||
| 47 | |||
| 48 | } else if ( op1.code() == Code.CONSTANT ) { |
||
| 49 | 44139 | jjdelcerro | String value = Objects.toString(((Constant)op1).value(), ""); |
| 50 | if( StringUtils.isBlank(value) ) {
|
||
| 51 | return op2;
|
||
| 52 | 44010 | jjdelcerro | } |
| 53 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
||
| 54 | return newCode;
|
||
| 55 | |||
| 56 | } else if ( op2.code() == Code.CONSTANT ) { |
||
| 57 | 44139 | jjdelcerro | String value = Objects.toString(((Constant)op2).value(), ""); |
| 58 | if( StringUtils.isBlank(value) ) {
|
||
| 59 | return op1;
|
||
| 60 | 44010 | jjdelcerro | } |
| 61 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
||
| 62 | return newCode;
|
||
| 63 | } |
||
| 64 | |||
| 65 | return caller;
|
||
| 66 | } |
||
| 67 | 43512 | jjdelcerro | |
| 68 | } |