Java Operator類代碼示例

import com.github.javaparser.ast.expr.AssignExpr.Operator; //導入依賴的package包/類
/**
 * Create a setter for this field, <b>will only work if this field declares only 1 identifier and if this field is
 * already added to a ClassOrInterfaceDeclaration</b>
 * 
 * @return the {@link MethodDeclaration} created
 * @throws IllegalStateException if there is more than 1 variable identifier or if this field isn't attached to a
 *             class or enum
 */
public MethodDeclaration createSetter() {
    if (getVariables().size() != 1)
        throw new IllegalStateException("You can use this only when the field declares only 1 variable name");
    ClassOrInterfaceDeclaration parentClass = getParentNodeOfType(ClassOrInterfaceDeclaration.class);
    EnumDeclaration parentEnum = getParentNodeOfType(EnumDeclaration.class);
    if ((parentClass == null && parentEnum == null) || (parentClass != null && parentClass.isInterface()))
        throw new IllegalStateException(
                "You can use this only when the field is attached to a class or an enum");

    VariableDeclarator variable = getVariables().get(0);
    String fieldName = variable.getId().getName();
    String fieldNameUpper = fieldName.toUpperCase().substring(0, 1) + fieldName.substring(1, fieldName.length());

    final MethodDeclaration setter;
    if (parentClass != null)
        setter = parentClass.addMethod("set" + fieldNameUpper, PUBLIC);
    else
        setter = parentEnum.addMethod("set" + fieldNameUpper, PUBLIC);
    setter.setType(VOID_TYPE);
    setter.getParameters().add(new Parameter(variable.getType(), new VariableDeclaratorId(fieldName)));
    BlockStmt blockStmt2 = new BlockStmt();
    setter.setBody(blockStmt2);
    blockStmt2.addStatement(new AssignExpr(new NameExpr("this." + fieldName), new NameExpr(fieldName), Operator.assign));
    return setter;
}
 

import com.github.javaparser.ast.expr.AssignExpr.Operator; //導入依賴的package包/類
@Override public void visit(AssignExpr n, Void arg) {
	if(n.getOperator().equals(Operator.ASSIGN)) {
		Expression target = n.getTarget();
		if(isOldFieldName(target.toString())) {
			n.setTarget(new NameExpr(m_fieldName));
		}

	}
	super.visit(n, arg);
}
 

import com.github.javaparser.ast.expr.AssignExpr.Operator; //導入依賴的package包/類
/**
 * Generates something like <code>field = newValue</code>
 * 
 * @param fieldName
 * @param valueName
 * @return
 */
private static BlockStmt fieldAssignment(String fieldName, String valueName) {
    BlockStmt body = new BlockStmt();
    body.addStatement(
            new ExpressionStmt(new AssignExpr(new NameExpr(fieldName), new NameExpr(valueName), Operator.ASSIGN)));
    return body;
}