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1 package groovy.sql;
2
3 import java.util.ArrayList  ;
4 import java.util.List ;
5
6 import org.codehaus.groovy.ast.CodeVisitorSupport;
7 import org.codehaus.groovy.ast.expr.BinaryExpression;
8 import org.codehaus.groovy.ast.expr.BooleanExpression;
9 import org.codehaus.groovy.ast.expr.ConstantExpression;
10 import org.codehaus.groovy.ast.expr.Expression;
11 import org.codehaus.groovy.ast.expr.PropertyExpression;
12 import org.codehaus.groovy.ast.stmt.ReturnStatement;
13 import org.codehaus.groovy.syntax.Token;
14 import org.codehaus.groovy.syntax.Types;
15
16
20 public class SqlWhereVisitor extends CodeVisitorSupport {
21
22 private StringBuffer buffer = new StringBuffer ();
23 private List parameters = new ArrayList ();
24
25 public String getWhere() {
26 return buffer.toString();
27 }
28
29 public void visitReturnStatement(ReturnStatement statement) {
30 statement.getExpression().visit(this);
31 }
32
33 public void visitBinaryExpression(BinaryExpression expression) {
34 Expression left = expression.getLeftExpression();
35 Expression right = expression.getRightExpression();
36
37 left.visit(this);
38 buffer.append(" ");
39
40 Token token = expression.getOperation();
41 buffer.append(tokenAsSql(token));
42
43 buffer.append(" ");
44 right.visit(this);
45 }
46
47 public void visitBooleanExpression(BooleanExpression expression) {
48 expression.getExpression().visit(this);
49 }
50
51 public void visitConstantExpression(ConstantExpression expression) {
52 getParameters().add(expression.getValue());
53 buffer.append("?");
54 }
55
56 public void visitPropertyExpression(PropertyExpression expression) {
57 buffer.append(expression.getProperty());
58 }
59
60 public List getParameters() {
61 return parameters;
62 }
63
64 protected String tokenAsSql(Token token) {
65 switch (token.getType()) {
66 case Types.COMPARE_EQUAL :
67 return "=";
68 case Types.LOGICAL_AND :
69 return "and";
70 case Types.LOGICAL_OR :
71 return "or";
72 default :
73 return token.getText();
74 }
75 }
76 }
77 |
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