com.alibaba.p3c.pmd.lang.java.rule.naming.LowerCamelCaseVariableNamingRule Maven / Gradle / Ivy

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/*
 * Copyright 1999-2017 Alibaba Group.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.p3c.pmd.lang.java.rule.naming;

import java.util.regex.Pattern;

import com.alibaba.p3c.pmd.I18nResources;
import com.alibaba.p3c.pmd.lang.java.rule.AbstractAliRule;
import com.alibaba.p3c.pmd.lang.java.util.ViolationUtils;

import net.sourceforge.pmd.lang.java.ast.ASTFieldDeclaration;
import net.sourceforge.pmd.lang.java.ast.ASTMethodDeclarator;
import net.sourceforge.pmd.lang.java.ast.ASTVariableDeclaratorId;

/**
 * [Mandatory] Method names, parameter names, member variable names, and local variable names should be written in
 * lowerCamelCase.
 *
 * @author changle.lq
 * @date 2017/04/16
 */
public class LowerCamelCaseVariableNamingRule extends AbstractAliRule {

    private static final String MESSAGE_KEY_PREFIX = "java.naming.LowerCamelCaseVariableNamingRule.violation.msg";
    private Pattern pattern = Pattern.compile("^[a-z|$][a-z0-9]*([A-Z][a-z0-9]*)*(DO|DTO|VO|DAO)?$");

    @Override
    public Object visit(final ASTVariableDeclaratorId node, Object data) {
        // Constant named does not apply to this rule
        ASTFieldDeclaration astFieldDeclaration = node.getFirstParentOfType(ASTFieldDeclaration.class);
        boolean isNotCheck = astFieldDeclaration != null && (astFieldDeclaration.isFinal() || astFieldDeclaration
            .isStatic());
        if (isNotCheck) {
            return super.visit(node, data);
        }

        // variable naming violate lowerCamelCase
        if (!(pattern.matcher(node.getImage()).matches())) {
            ViolationUtils.addViolationWithPrecisePosition(this, node, data,
                I18nResources.getMessage(MESSAGE_KEY_PREFIX + ".variable", node.getImage()));
        }
        return super.visit(node, data);
    }

    @Override

    public Object visit(ASTMethodDeclarator node, Object data) {
        if (!(pattern.matcher(node.getImage()).matches())) {
            ViolationUtils.addViolationWithPrecisePosition(this, node, data,
                I18nResources.getMessage(MESSAGE_KEY_PREFIX + ".method", node.getImage()));
        }
        return super.visit(node, data);
    }
}