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46 package org.codehaus.groovy.ast.expr;
47
48 import java.math.BigDecimal;
49 import java.math.BigInteger;
50
51 import org.codehaus.groovy.ast.ClassNode;
52 import org.codehaus.groovy.ast.GroovyCodeVisitor;
53 import org.codehaus.groovy.syntax.Token;
54 import org.codehaus.groovy.syntax.Types;
55
56 /***
57 * Represents two expressions and an operation
58 *
59 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
60 * @version $Revision: 1.10 $
61 */
62 public class BinaryExpression extends Expression {
63
64 private Expression leftExpression;
65 private Expression rightExpression;
66 private Token operation;
67
68 public BinaryExpression(Expression leftExpression,
69 Token operation,
70 Expression rightExpression) {
71 this.leftExpression = leftExpression;
72 this.operation = operation;
73 this.rightExpression = rightExpression;
74
75 }
76
77 private static boolean isFloatingPoint(Class cls) {
78 return cls == Double.class || cls == Float.class;
79 }
80
81 private static boolean isInteger(Class cls) {
82 return cls == Integer.class || cls == Byte.class || cls == Short.class || cls == Character.class;
83 }
84
85 private static boolean isLong(Class cls) {
86 return cls == Long.class;
87 }
88
89 private static boolean isBigDecimal(Class cls) {
90 return cls == BigDecimal.class;
91 }
92
93 private static boolean isBigInteger(Class cls) {
94 return cls == BigInteger.class;
95 }
96
97 public String toString() {
98 return super.toString() +"[" + leftExpression + operation + rightExpression + "]";
99 }
100
101 public void visit(GroovyCodeVisitor visitor) {
102 visitor.visitBinaryExpression(this);
103 }
104
105 public Expression transformExpression(ExpressionTransformer transformer) {
106 return new BinaryExpression(transformer.transform(leftExpression), operation, transformer.transform(rightExpression));
107 }
108
109 public Expression getLeftExpression() {
110 return leftExpression;
111 }
112
113 public void setLeftExpression(Expression leftExpression) {
114 this.leftExpression = leftExpression;
115 }
116
117 public void setRightExpression(Expression rightExpression) {
118 this.rightExpression = rightExpression;
119 }
120
121 public Token getOperation() {
122 return operation;
123 }
124
125 public Expression getRightExpression() {
126 return rightExpression;
127 }
128
129 public String getText() {
130 if (operation.getType() == Types.LEFT_SQUARE_BRACKET) {
131 return leftExpression.getText() + "[" + rightExpression.getText() + "]";
132 }
133 return "(" + leftExpression.getText() + " " + operation.getText() + " " + rightExpression.getText() + ")";
134 }
135
136
137 /***
138 * Creates an assignment expression in which the specified expression
139 * is written into the specified variable name.
140 */
141
142 public static BinaryExpression newAssignmentExpression( String variable, Expression rhs ) {
143 VariableExpression lhs = new VariableExpression( variable );
144 Token operator = Token.newPlaceholder( Types.ASSIGN );
145
146 return new BinaryExpression( lhs, operator, rhs );
147 }
148
149
150 /***
151 * Creates variable initialization expression in which the specified expression
152 * is written into the specified variable name.
153 */
154
155 public static BinaryExpression newInitializationExpression( String variable, ClassNode type, Expression rhs ) {
156 VariableExpression lhs = new VariableExpression( variable );
157
158 if( type != null ) {
159 lhs.setType(type);
160 }
161
162 Token operator = Token.newPlaceholder( Types.ASSIGN );
163
164 return new BinaryExpression( lhs, operator, rhs );
165 }
166
167 }