Java JavaParser类代码示例

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
private static boolean isAddReplaceOpen(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    String methodName = node.astName().astValue();

    if (ADD_TRANSACTION.equals(methodName) || OPEN_TRANSACTION.equals(methodName) || REPLACE_TRANSACTION.equals(methodName)) {
        JavaParser.ResolvedNode resolved = context.resolve(node);
        if (resolved instanceof JavaParser.ResolvedMethod) {
            JavaParser.ResolvedMethod method = (JavaParser.ResolvedMethod) resolved;
            JavaParser.ResolvedClass containingClass = method.getContainingClass();
            if (containingClass.isSubclassOf(ACTIVITY_MANAGER, false)) {
                return true;
            }
        }
    }

    return false;
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public boolean visitVariableDefinitionEntry(VariableDefinitionEntry node) {
    Expression initializer = node.astInitializer();
    if (initializer instanceof VariableReference) {
        JavaParser.ResolvedNode resolved = mContext.resolve(initializer);
        //noinspection SuspiciousMethodCalls
        if (resolved != null && mVariables.contains(resolved)) {
            JavaParser.ResolvedNode resolvedVariable = mContext.resolve(node);
            if (resolvedVariable instanceof JavaParser.ResolvedVariable) {
                JavaParser.ResolvedVariable variable = (JavaParser.ResolvedVariable) resolvedVariable;
                mVariables.add(variable);
            }
        }
    }
    return super.visitVariableDefinitionEntry(node);
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public boolean visitBinaryExpression(BinaryExpression node) {
    if (node.astOperator() == BinaryOperator.ASSIGN) {
        Expression rhs = node.astRight();
        if (rhs instanceof VariableReference) {
            JavaParser.ResolvedNode resolved = mContext.resolve(rhs);
            //noinspection SuspiciousMethodCalls
            if (resolved != null && mVariables.contains(resolved)) {
                JavaParser.ResolvedNode resolvedLhs = mContext.resolve(node.astLeft());
                if (resolvedLhs instanceof JavaParser.ResolvedVariable) {
                    JavaParser.ResolvedVariable variable = (JavaParser.ResolvedVariable) resolvedLhs;
                    mVariables.add(variable);
                }
            }
        }
    }
    return super.visitBinaryExpression(node);
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public AstVisitor createJavaVisitor(final JavaContext context) {
    return new ForwardingAstVisitor() {
        @Override
        public boolean visitMethodInvocation(MethodInvocation node) {
            JavaParser.ResolvedNode resolve = context.resolve(node);
            if (resolve instanceof JavaParser.ResolvedMethod) {
                JavaParser.ResolvedMethod method = (JavaParser.ResolvedMethod) resolve;
                // 方法所在的类校验
                JavaParser.ResolvedClass containingClass = method.getContainingClass();
                if (containingClass.matches("android.util.Log")) {
                    context.report(ISSUE, node, context.getLocation(node),
                                   "请使用Ln，避免使用Log");
                    return true;
                }
                if (node.toString().startsWith("System.out.println")) {
                    context.report(ISSUE, node, context.getLocation(node),
                                   "请使用Ln，避免使用System.out.println");
                    return true;
                }
            }
            return super.visitMethodInvocation(node);
        }
    };
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
public static JavaParser.ResolvedMethod parseResolvedMethod(
        @NonNull JavaContext context, @NonNull Node node) {
    if (null == context || null == node) {
        return null;
    }

    JavaParser.ResolvedNode resolvedNode = null;
    try {
        resolvedNode = context.resolve(node);
    } catch (Exception e) {
        // TODO
    }

    return (resolvedNode instanceof JavaParser.ResolvedMethod) ?
            (JavaParser.ResolvedMethod)resolvedNode : null;
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public boolean visitMethodInvocation(MethodInvocation node) {
    if (1 == MissingApiChecker.MODE) {
        JavaParser.ResolvedMethod resolvedMethod = NodeUtils.parseResolvedMethod(mContext, node);
        if (null == resolvedMethod) {
            return super.visitMethodInvocation(node);
        }

        String clazzName = resolvedMethod.getContainingClass().getName();
        String methodSignature = resolvedMethod.getSignature();
        boolean isMissing = validateRemoved(node, clazzName, methodSignature);
        if (!isMissing) {
            isMissing = validateHide(node, clazzName, methodSignature);
        }
    }

    return super.visitMethodInvocation(node);
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * 给定thread变量名，获取其所有的setPriority()节点列表
 *
 * @param operand
 * @param node
 * @param setPriorityNodes
 */
private void searchSetPriorityNodes(Node operand, Node node, ArrayList<MethodInvocation> setPriorityNodes) {
    JavaParser.ResolvedMethod resolvedMethod = NodeUtils.parseResolvedMethod(mContext, node);
    if (null != resolvedMethod &&
            "setPriority".equals(resolvedMethod.getName()) &&
            resolvedMethod.getContainingClass().isSubclassOf("java.lang.Thread", false) &&
            node instanceof MethodInvocation) {
        MethodInvocation methodInvocation = (MethodInvocation)node;
        // 这里比较的是Node.toString()而非Node本身，原因在于，赋值节点的operand是Identifier，
        // 而此处Thread.setPriority()节点的operand确实VariableReference。虽然它们的字符串值
        // 相同，但是在AST里却是不同类型的节点。
        if (methodInvocation.rawOperand().toString().equals(operand.toString())) {
            setPriorityNodes.add(methodInvocation);
        }
    }

    List<Node> children = node.getChildren();
    if (null != children && !children.isEmpty()) {
        for (Node child : node.getChildren()) {
            searchSetPriorityNodes(operand, child, setPriorityNodes);
        }
    }
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public boolean visitMethodInvocation(MethodInvocation node) {
    JavaParser.ResolvedMethod resolvedMethod = NodeUtils.parseResolvedMethod(mContext, node);
    if (null == resolvedMethod) {
        return super.visitMethodInvocation(node);
    }

    // The containing class must be subclass of android.app.ActivityManager
    JavaParser.ResolvedClass resolvedClass = resolvedMethod.getContainingClass();
    if (!resolvedClass.isSubclassOf("android.app.ActivityManager", false)) {
        return super.visitMethodInvocation(node);
    }

    // Only handle ActivityManager.getRunningAppProcesses()
    if (!getRunningAppProcesses_SIGNATURE.equals(resolvedMethod.getSignature())) {
        return super.visitMethodInvocation(node);
    }

    mContext.report(
            GetRunningAppProcessesDetector.ISSUE,
            mContext.getLocation(node),
            "Please DO NOT invoke ActivityManager.getRunningAppProcesses(), since it may cause performance issue and not applicable in Android 5.1+ .");

    return super.visitMethodInvocation(node);
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public boolean visitConstructorInvocation(ConstructorInvocation node) {
    JavaParser.ResolvedNode resolvedType = mContext.resolve(node.astTypeReference());
    JavaParser.ResolvedClass resolvedClass = (JavaParser.ResolvedClass) resolvedType;

    if (resolvedClass != null
            && resolvedClass.isSubclassOf("android.os.Message", false)){
        mContext.report(ISSUE,
                node,
                mContext.getLocation(node),
                "You should not call `new Message()` directly.");

        return true;

    }

    return super.visitConstructorInvocation(node);
}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * If setContentView is called by 'this' instance,
 * this method will check if 'this' is an instance of a Class inherit from android.app.Activity, for eaxmple AppCompatActivity or FragmentActivity, and so on.
 */
private boolean isThisInstanceOfActivity_ForActivity(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    Node currentNode = node.getParent();

    JavaParser.ResolvedNode resolved = context.resolve(JavaContext.findSurroundingClass(node));
    JavaParser.ResolvedClass sorroundingClass = (JavaParser.ResolvedClass) resolved;
    while (sorroundingClass != null) {
        //System.out.println("sorroundingClass = " + sorroundingClass);
        if ("android.app.Activity".equals(sorroundingClass.getName())) {
            return true;
        } else {
            sorroundingClass = sorroundingClass.getSuperClass();
        }
    }


    return false;


}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * As there are more than one methods overload "setContentView",
 * we have to identify the one we want to check, whose param has an Annotation of "@LayoutRes".
 * In fact, {public void setContentView(@LayoutRes int layoutResID)} is the one we are looking for.
 */
private boolean isThisMethodHasLayoutAnnotation_ForActivity(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    JavaParser.ResolvedNode resolved = context.resolve(node);
    JavaParser.ResolvedMethod method = (JavaParser.ResolvedMethod) resolved;

    if (node.astArguments().size() != 1) {
        return false;
    }

    Iterable<JavaParser.ResolvedAnnotation> annotations = method.getParameterAnnotations(0);
    for (JavaParser.ResolvedAnnotation annotation : annotations) {
        if ("android.support.annotation.LayoutRes".equals(annotation.getName())) {
            return true;
        }
    }

    return false;

}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * inflater.inflate() can be called from anywhere.
 * We only care about the one call in {public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)}.
 * This method whill check that.
 */
private boolean isInflateCalledInOnCreateView_ForFragment(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    Node surroundingNode = JavaContext.findSurroundingMethod(node);
    JavaParser.ResolvedNode resolvedNode = context.resolve(surroundingNode);

    try {
        String resolvedNodeName = resolvedNode.getName();
        if ("onCreateView".equals(resolvedNodeName)) {
            return true;
        }
    } catch (Exception e) {
        return false;
    }
    return false;

}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * There are more than one methods overloading in the name of "inflate()" in android.view.LayoutInflater.<br>
 * We only care about those having an param with `@LayoutRes` annotation,
 * for example {public View inflate(@LayoutRes int resource, @Nullable ViewGroup root, boolean attachToRoot)}.<br>
 * This method will find out the resource param with an `@LayoutRes` annotation in String format, for example `R.layout.fragment_blank` .<br>
 * If no such param exists, <B>null</B> will be returned.
 */
private String getParamWithLayoutAnnotation_ForFragment(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    Iterator<Expression> arguments = node.astArguments().iterator();
    Expression argument = arguments.next();

    JavaParser.ResolvedNode resolved = context.resolve(node);
    JavaParser.ResolvedMethod method = (JavaParser.ResolvedMethod) resolved;

    JavaParser.ResolvedAnnotation layoutParamAnnotation = method.getParameterAnnotation("android.support.annotation.LayoutRes", 0);
    if (layoutParamAnnotation != null) {
        return argument.toString();
    } else {
        return null;
    }

}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
@Override
public void visitMethod(@NonNull JavaContext context, AstVisitor visitor, @NonNull MethodInvocation node) {
    JavaParser.ResolvedClass sorroundingClass = (JavaParser.ResolvedClass)context.resolve(JavaContext.findSurroundingClass(node));
    JavaParser.ResolvedMethod sorroundingMethod = (JavaParser.ResolvedMethod)context.resolve(JavaContext.findSurroundingMethod(node));

    if (sorroundingMethod.getName().equals("onCreateViewHolder")
            && sorroundingClass.isSubclassOf("android.support.v7.widget.RecyclerView.Adapter", false)){


        String layoutString = getParamWithLayoutAnnotation(context, node);
        if (layoutString == null){
            return;
        }

        if (!isFileStringStartWithPrefix(layoutString, "item_")) {
            context.report(ISSUE,
                    node,
                    context.getLocation(node),
                    "Layout resource file in ViewHolder must be named with prefix `item_`.");
        }

    }


}
 

import com.android.tools.lint.client.api.JavaParser; //导入依赖的package包/类
/**
 * There are more than one methods overloading in the name of "inflate()" in android.view.LayoutInflater.<br>
 * We only care about those having an param with `@LayoutRes` annotation,
 * for example {public View inflate(@LayoutRes int resource, @Nullable ViewGroup root, boolean attachToRoot)}.<br>
 * This method will find out the resource param with an `@LayoutRes` annotation in String format, for example `R.layout.fragment_blank` .<br>
 * If no such param exists, <B>null</B> will be returned.
 */
private String getParamWithLayoutAnnotation(@NonNull JavaContext context, @NonNull MethodInvocation node) {
    Iterator<Expression> arguments = node.astArguments().iterator();
    Expression argument = arguments.next();

    JavaParser.ResolvedNode resolved = context.resolve(node);
    JavaParser.ResolvedMethod method = (JavaParser.ResolvedMethod) resolved;

    JavaParser.ResolvedAnnotation layoutParamAnnotation = method.getParameterAnnotation("android.support.annotation.LayoutRes", 0);
    if (layoutParamAnnotation != null) {
        return argument.toString();
    } else {
        return null;
    }

}