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 / AddOperator.java @ 44207
History | View | Annotate | Download (3.79 KB)
1 |
package org.gvsig.expressionevaluator.impl.function.operator; |
---|---|
2 |
|
3 |
import java.util.Objects; |
4 |
import org.gvsig.expressionevaluator.Code; |
5 |
import org.gvsig.expressionevaluator.Code.Caller; |
6 |
import org.gvsig.expressionevaluator.Code.Constant; |
7 |
import org.gvsig.expressionevaluator.ExpressionBuilder; |
8 |
import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_ADD; |
9 |
import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
10 |
import org.gvsig.expressionevaluator.Function; |
11 |
import org.gvsig.expressionevaluator.Interpreter; |
12 |
import org.gvsig.expressionevaluator.Optimizer; |
13 |
import org.gvsig.expressionevaluator.Optimizer.FunctionOptimizer; |
14 |
import org.gvsig.expressionevaluator.impl.I18N; |
15 |
|
16 |
public class AddOperator |
17 |
extends AbstractBinaryOperator
|
18 |
implements FunctionOptimizer
|
19 |
{ |
20 |
|
21 |
|
22 |
public AddOperator() {
|
23 |
super(Function.GROUP_NUMERIC, OPERATOR_ADD, true); |
24 |
} |
25 |
|
26 |
@Override
|
27 |
public boolean allowConstantFolding() { |
28 |
return true; |
29 |
} |
30 |
|
31 |
@Override
|
32 |
public Object call(Interpreter interpreter, Object op1, Object op2) { |
33 |
int type = this.getType(op1, op2); |
34 |
if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {
|
35 |
double value = ((Number) op1).doubleValue() + ((Number) op2).doubleValue(); |
36 |
return value;
|
37 |
} |
38 |
if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {
|
39 |
double value = ((Number) op1).floatValue() + ((Number) op2).floatValue(); |
40 |
return value;
|
41 |
} |
42 |
if( (type & TYPE_LONG) == TYPE_LONG ) {
|
43 |
long value = ((Number) op1).longValue() + ((Number) op2).longValue(); |
44 |
return value;
|
45 |
} |
46 |
if( (type & TYPE_INT) == TYPE_INT ) {
|
47 |
int value = ((Number) op1).intValue()+ ((Number) op2).intValue(); |
48 |
return value;
|
49 |
} |
50 |
if( (type & TYPE_STRING) == TYPE_STRING ) {
|
51 |
if( interpreter.isSQLCompatible() ) {
|
52 |
throw new ExpressionRuntimeException( |
53 |
null,
|
54 |
"The '"+name()+"' operator can not be used with string operands", |
55 |
I18N.Use_the_operator_CONCAT_to_concatenate_strings() |
56 |
); |
57 |
} |
58 |
return Objects.toString(op1, "")+Objects.toString(op2, ""); |
59 |
} |
60 |
throw new IllegalArgumentException("Types not allowed in '"+name()+"' operand."); |
61 |
} |
62 |
|
63 |
@Override
|
64 |
public Code optimize(Optimizer optimizer, Caller caller) {
|
65 |
Code op1 = optimizer.optimize(caller.parameters().get(0));
|
66 |
Code op2 = optimizer.optimize(caller.parameters().get(1));
|
67 |
|
68 |
if ( op1.code() == Code.CONSTANT && op2.code() == Code.CONSTANT) {
|
69 |
Code newCode = optimizer.getCodeBuilder().constant( |
70 |
call( |
71 |
optimizer.getInterpreter(), |
72 |
((Constant)op1).value(), |
73 |
((Constant)op2).value() |
74 |
) |
75 |
); |
76 |
return newCode;
|
77 |
|
78 |
} else if ( op1.code() == Code.CONSTANT ) { |
79 |
Object value = ((Constant)op1).value();
|
80 |
if( value instanceof Number ) { |
81 |
double n = ((Number) value).doubleValue(); |
82 |
if( n == 0 ) { |
83 |
return op2;
|
84 |
} |
85 |
} |
86 |
Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
87 |
return newCode;
|
88 |
|
89 |
} else if ( op2.code() == Code.CONSTANT ) { |
90 |
Object value = ((Code.Constant)op2).value();
|
91 |
if( value instanceof Number ) { |
92 |
double n = ((Number) value).doubleValue(); |
93 |
if( n == 0 ) { |
94 |
return op1;
|
95 |
} |
96 |
} |
97 |
Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
98 |
return newCode;
|
99 |
} |
100 |
|
101 |
return caller;
|
102 |
} |
103 |
|
104 |
} |