Java AST.newInfixExpression方法代碼示例

import org.eclipse.jdt.core.dom.AST; //導入方法依賴的package包/類
public static Expression newInfixExpression(AST ast, Operator operator, ArrayList<Expression> operands) {
	if (operands.size() == 1) {
		return operands.get(0);
	}

	InfixExpression result= ast.newInfixExpression();
	result.setOperator(operator);
	result.setLeftOperand(operands.get(0));
	result.setRightOperand(operands.get(1));
	result.extendedOperands().addAll(operands.subList(2, operands.size()));
	return result;
}
 

import org.eclipse.jdt.core.dom.AST; //導入方法依賴的package包/類
private static Expression createInfixInvocationFromPostPrefixExpression(InfixExpression.Operator operator, Expression getterExpression, AST ast, ITypeBinding variableType, boolean is50OrHigher) {
	InfixExpression infix = ast.newInfixExpression();
	infix.setLeftOperand(getterExpression);
	infix.setOperator(operator);
	NumberLiteral number = ast.newNumberLiteral();
	number.setToken("1"); //$NON-NLS-1$
	infix.setRightOperand(number);
	ITypeBinding infixType = infix.resolveTypeBinding();
	return createNarrowCastIfNessecary(infix, infixType, ast, variableType, is50OrHigher);
}
 

import org.eclipse.jdt.core.dom.AST; //導入方法依賴的package包/類
/**
 * Converts an assignment, postfix expression or prefix expression into an
 * assignable equivalent expression using the getter.
 *
 * @param node
 *            the assignment/prefix/postfix node
 * @param astRewrite
 *            the astRewrite to use
 * @param getterExpression
 *            the expression to insert for read accesses or
 *            <code>null</code> if such an expression does not exist
 * @param variableType
 *            the type of the variable that the result will be assigned to
 * @param is50OrHigher
 *            <code>true</code> if a 5.0 or higher environment can be used
 * @return an expression that can be assigned to the type variableType with
 *         node being replaced by a equivalent expression using the getter
 */
public static Expression getAssignedValue(ASTNode node, ASTRewrite astRewrite, Expression getterExpression, ITypeBinding variableType, boolean is50OrHigher) {
	InfixExpression.Operator op = null;
	AST ast = astRewrite.getAST();
	if (isNotInBlock(node)) {
		return null;
	}
	if (node.getNodeType() == ASTNode.ASSIGNMENT) {
		Assignment assignment = ((Assignment) node);
		Expression rightHandSide = assignment.getRightHandSide();
		Expression copiedRightOp = (Expression) astRewrite.createCopyTarget(rightHandSide);
		if (assignment.getOperator() == Operator.ASSIGN) {
			ITypeBinding rightHandSideType = rightHandSide.resolveTypeBinding();
			copiedRightOp = createNarrowCastIfNessecary(copiedRightOp, rightHandSideType, ast, variableType, is50OrHigher);
			return copiedRightOp;
		}
		if (getterExpression != null) {
			InfixExpression infix = ast.newInfixExpression();
			infix.setLeftOperand(getterExpression);
			infix.setOperator(ASTNodes.convertToInfixOperator(assignment.getOperator()));
			ITypeBinding infixType = infix.resolveTypeBinding();
			if (NecessaryParenthesesChecker.needsParenthesesForRightOperand(rightHandSide, infix, variableType)) {
				ParenthesizedExpression p = ast.newParenthesizedExpression();
				p.setExpression(copiedRightOp);
				copiedRightOp = p;
			}
			infix.setRightOperand(copiedRightOp);
			return createNarrowCastIfNessecary(infix, infixType, ast, variableType, is50OrHigher);
		}
	} else if (node.getNodeType() == ASTNode.POSTFIX_EXPRESSION) {
		PostfixExpression po = (PostfixExpression) node;
		if (po.getOperator() == PostfixExpression.Operator.INCREMENT) {
			op = InfixExpression.Operator.PLUS;
		}
		if (po.getOperator() == PostfixExpression.Operator.DECREMENT) {
			op = InfixExpression.Operator.MINUS;
		}
	} else if (node.getNodeType() == ASTNode.PREFIX_EXPRESSION) {
		PrefixExpression pe = (PrefixExpression) node;
		if (pe.getOperator() == PrefixExpression.Operator.INCREMENT) {
			op = InfixExpression.Operator.PLUS;
		}
		if (pe.getOperator() == PrefixExpression.Operator.DECREMENT) {
			op= InfixExpression.Operator.MINUS;
		}
	}
	if (op != null && getterExpression != null) {
		return createInfixInvocationFromPostPrefixExpression(op, getterExpression, ast, variableType, is50OrHigher);
	}
	return null;
}