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javaparser | Java 115 Parser and Abstract Syntax Tree | Parser library

 by   javaparser Java Version: javaparser-parent-3.24.2 License: Non-SPDX

 by   javaparser Java Version: javaparser-parent-3.24.2 License: Non-SPDX

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kandi X-RAY | javaparser Summary

javaparser is a Java library typically used in Utilities, Parser applications. javaparser has no bugs, it has no vulnerabilities, it has build file available and it has high support. However javaparser has a Non-SPDX License. You can download it from GitHub, Maven.
This project contains a set of libraries implementing a Java 1.0 - Java 15 Parser with advanced analysis functionalities. This includes preview features to Java 13, with Java 14 preview features work-in-progress. Our main site is at JavaParser.org.
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Support
Quality
Quality
Security
Security
License
License
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kandi-support Support

  • javaparser has a highly active ecosystem.
  • It has 4167 star(s) with 960 fork(s). There are 144 watchers for this library.
  • There were 2 major release(s) in the last 6 months.
  • There are 424 open issues and 1508 have been closed. On average issues are closed in 106 days. There are 43 open pull requests and 0 closed requests.
  • It has a positive sentiment in the developer community.
  • The latest version of javaparser is javaparser-parent-3.24.2
javaparser Support
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javaparser Support
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quality kandi Quality

  • javaparser has 0 bugs and 0 code smells.
javaparser Quality
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javaparser Quality
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securitySecurity

  • javaparser has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • javaparser code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
javaparser Security
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javaparser Security
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license License

  • javaparser has a Non-SPDX License.
  • Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.
javaparser License
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javaparser License
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buildReuse

  • javaparser releases are available to install and integrate.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions, examples and code snippets are available.
  • It has 189561 lines of code, 20415 functions and 1754 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
javaparser Reuse
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javaparser Reuse
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Top functions reviewed by kandi - BETA

kandi has reviewed javaparser and discovered the below as its top functions. This is intended to give you an instant insight into javaparser implemented functionality, and help decide if they suit your requirements.

  • Constructs a bounding bounds from the given typeSolver .
  • Returns true if the given name is syntactically typed .
  • Attempts to resolve the given node .
  • Emit the type of a conditional expression .
  • Gets the category for the given kind .
  • Checks if the specified method declaration is applicable to the specified method .
  • Apply an added diff element .
  • The method invocation type inference rules .
  • Determine if the given statement is reachable .
  • Registers the corresponding formal type .

javaparser Key Features

Java 1-15 Parser and Abstract Syntax Tree for Java, including preview features to Java 13

Setup

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<dependency>
    <groupId>com.github.javaparser</groupId>
    <artifactId>javaparser-symbol-solver-core</artifactId>
    <version>3.24.0</version>
</dependency>

How To Compile Sources

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mvnw clean install

maven-checkstyle-plugin failed to parse Java 'record'

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<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-checkstyle-plugin</artifactId>
    <version>3.1.2</version>
    <configuration>
       ...
    </configuration>
    <dependencies>
        <dependency>
            <groupId>com.puppycrawl.tools</groupId>
            <artifactId>checkstyle</artifactId>
            <version>9.2</version>
        </dependency>
    </dependencies>
    <executions>
        ...
    </executions>
</plugin>

Check if rewriter has any changes

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package org.antlr.v4.runtime;

import org.antlr.v4.runtime.TokenStream;
import org.antlr.v4.runtime.TokenStreamRewriter;

public class MyTokenStreamRewriter extends TokenStreamRewriter {
    public MyTokenStreamRewriter(TokenStream tokens) {
        super(tokens);
    }

    public int getRewriteCount() {
        return getRewriteCount(DEFAULT_PROGRAM_NAME);
    }

    public int getRewriteCount(String programName) {
        return programs.get(programName).size();
    }
}

Groovy 4, JDK 11: Caught: Assertion failed

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-Dgroovy.attach.runtime.groovydoc=true

JavaParser removes empty lines

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CompilationUnit lpp = LexicalPreservingPrinter.setup(unit);
System.out.println(LexicalPreservingPrinter.print(lpp));

ClassOrInterfaceDeclaration.getTokenRange() gets all the tokens for a file even after removing nodes from the class

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sourceRoot.saveAll(Paths.get(parsedFilePath));
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration;
import com.github.javaparser.ast.visitor.ModifierVisitor;
import com.github.javaparser.ast.visitor.Visitable;
import com.github.javaparser.utils.SourceRoot;

import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.stream.Collectors;

public class Main {

    public  static  void main(String[] args) throws IOException {
        Path dirPath =  Paths.get("C:\\JavaParserTest\\src\\main\\resources\\src\\");
        SourceRoot sourceRoot = new SourceRoot(dirPath);
        sourceRoot.tryToParse();
        CompilationUnit cu = sourceRoot.parse("", dirPath.toString()+"\\JavaFile.java");

        cu.accept(new ModifierVisitor<Void>() {
            @Override
            public Visitable visit(ClassOrInterfaceDeclaration n, Void arg) {
                RemoveOtherClassesFromSameFile(n, cu);
                return super.visit(n, arg);
            }
        }, null);

        sourceRoot.saveAll(Paths.get(dirPath.toString()+"\\JavaFile.java"));
    }

    private static ClassOrInterfaceDeclaration RemoveOtherClassesFromSameFile(ClassOrInterfaceDeclaration n, CompilationUnit cu) {
        List<ClassOrInterfaceDeclaration> internalClasses = (
                n.getMembers().stream().filter(m -> m instanceof ClassOrInterfaceDeclaration)
                        .map(m -> (ClassOrInterfaceDeclaration) m).collect(Collectors.toList()));
        for (ClassOrInterfaceDeclaration c : internalClasses){
            n.remove(c);
        }
        return n;
    }

}
-----------------------
sourceRoot.saveAll(Paths.get(parsedFilePath));
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration;
import com.github.javaparser.ast.visitor.ModifierVisitor;
import com.github.javaparser.ast.visitor.Visitable;
import com.github.javaparser.utils.SourceRoot;

import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.stream.Collectors;

public class Main {

    public  static  void main(String[] args) throws IOException {
        Path dirPath =  Paths.get("C:\\JavaParserTest\\src\\main\\resources\\src\\");
        SourceRoot sourceRoot = new SourceRoot(dirPath);
        sourceRoot.tryToParse();
        CompilationUnit cu = sourceRoot.parse("", dirPath.toString()+"\\JavaFile.java");

        cu.accept(new ModifierVisitor<Void>() {
            @Override
            public Visitable visit(ClassOrInterfaceDeclaration n, Void arg) {
                RemoveOtherClassesFromSameFile(n, cu);
                return super.visit(n, arg);
            }
        }, null);

        sourceRoot.saveAll(Paths.get(dirPath.toString()+"\\JavaFile.java"));
    }

    private static ClassOrInterfaceDeclaration RemoveOtherClassesFromSameFile(ClassOrInterfaceDeclaration n, CompilationUnit cu) {
        List<ClassOrInterfaceDeclaration> internalClasses = (
                n.getMembers().stream().filter(m -> m instanceof ClassOrInterfaceDeclaration)
                        .map(m -> (ClassOrInterfaceDeclaration) m).collect(Collectors.toList()));
        for (ClassOrInterfaceDeclaration c : internalClasses){
            n.remove(c);
        }
        return n;
    }

}

JavaParser- Removing an operator from the expression at the AST level. How to replace a parent node with its child?

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SourceRoot sourceRoot = new SourceRoot(Paths.get("Foo.java"));
CompilationUnit cu = sourceRoot.parse("", "Foo.java");

cu.accept(new ModifierVisitor<Void>() {
    @Override
    public Visitable visit(BinaryExpr n, Void arg) {
        if (n.getOperator() == Operator.BINARY_AND) {
            n.replace(n.getLeft());
            return n.getLeft(); // note this line!
        }
        return super.visit(n, arg);
    }
}, null);
sourceRoot.saveAll(Paths.get("Foo.java"));

Lwjgl window not opening

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glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);
window = glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);
-----------------------
glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);
window = glfwCreateWindow(width, height, "Flappy Bird", NULL, NULL);

Which rule does the string match?

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public static final String[] ruleNames

Javaparser - How to read a method if a condition occurs

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ParserConfiguration config = new ParserConfiguration();
CombinedTypeSolver cts = new CombinedTypeSolver(new ReflectionTypeSolver(false),new JavaParserTypeSolver(rootSourceDir.toFile()));
// for each library dependency 
cts.add(new JarTypeSolver(<path to the jar file>));
config.setSymbolResolver(new JavaSymbolSolver(cts));
StaticJavaParser.setConfiguration(config);
-----------------------
CompilationUnit cu = StaticJavaParser.parse(code);
List<MethodCallExpr> methodCallExpr = cu.findAll(MethodCallExpr.class);
for (MethodCallExpr expr : methodCallExpr) {
    Expression arg = expr.getArgument(0);
    // test if it's a NameExpr
    ResolvedValueDeclaration vd = arg.asNameExpr().resolve();
    if (vd.isField()) {
        FieldDeclaration vde = ((JavaParserFieldDeclaration)vd).getWrappedNode();
        System.out.println(vde.getVariable(0).getInitializer().get());
    }
}

How know a variable is read or modified using JavaParser

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for (NameExpr nameExpr : callingMethod.findAll(NameExpr.class)) {

    ResolvedValueDeclaration calledVariable = nameExpr.resolve();

    String variableName = calledVariable.getName();
    String variableType = calledVariable.getType().describe();
                
    String type = "Read";

    Node parentNode = nameExpr.getParentNode().get();
    if (parentNode instanceof AssignExpr) {
                    
        Expression target = ((AssignExpr)parentNode).getTarget();
                    
        //Note that arrayAccessExp is not covered in this code
        if (target.isNameExpr()) {
            if (target.asNameExpr().getNameAsString().equals(variableName)) 
                    type = "Write";
        }
    }
}

Community Discussions

Trending Discussions on javaparser
  • Modify GroovyDSL classpath to include 3rd party libraries
  • maven-checkstyle-plugin failed to parse Java 'record'
  • Check if rewriter has any changes
  • Groovy 4, JDK 11: Caught: Assertion failed
  • JavaParser removes empty lines
  • Is it possible to statically distinguish between fully qualified names and nested class types?
  • ClassOrInterfaceDeclaration.getTokenRange() gets all the tokens for a file even after removing nodes from the class
  • JavaParser- Removing an operator from the expression at the AST level. How to replace a parent node with its child?
  • Antlr v4 thread-safe mode
  • Lwjgl window not opening
Trending Discussions on javaparser

QUESTION

Modify GroovyDSL classpath to include 3rd party libraries

Asked 2022-Mar-27 at 10:13

I'm trying to create a GroovyDSL script which references some external libraries. Here's my script:

import com.github.javaparser.ast.Node
import org.reflections.Reflections

def ctx = context(
        ctype: 'groovy.util.ObjectGraphBuilder',
        paths: ['com/example/scripts/.*'],
        filetypes: ["groovy"]
)

Map<String, Class> candidateClasses = new Reflections(Node.packageName).getSubTypesOf(Node)
        .collectEntries { Class type -> [(type.simpleName.uncapitalize()): type] }

contributor(ctx) {
    candidateClasses.each { String methodName, Class type ->
        method name: methodName, params: [props: "java.util.Map", closure: "groovy.lang.Closure"], type: type.name
    }
}

Trying to enable it in Intellij, I'm getting:

startup failed: transformDslSyntaxgdsl: 1: unable to resolve class com.github.javaparser.ast.Node

@ line 1, column 1.

import com.github.javaparser.ast.Node

Now, I have the proper external dependencies declared in pom.xml, the rest of the code that depends on them is working just fine. I've also put the script inside a source folder (which some other answers here suggested might be relevant).

I have seen some examples for GDSL reference Intellij types like PsiClass, which tells me the classpath for GDSL files seems to be different from the project classpath. Is there any way to make sure project dependencies are appended to that classpath?

I also tried using @Grape only to get this error. Adding Apache Ivy as a dependency doesn't help, because again, project dependencies don't seem to influence the GDSL classpath.

ANSWER

Answered 2022-Mar-27 at 10:13

After a bit more digging, I found that it is pretty easy to modify the IDE's classpath itself.

All you need to do is to drop a dependency into Intellij installation directory's lib subfolder, and reference the jar inside classpath.txt.

Initially, I added the jars my GDSL depends on directly, but then I realized I could simply add a dependency on Apache Ivy to classpath.txt instead and @Grab annotations would start working.

Source https://stackoverflow.com/questions/71369767

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install javaparser

The project binaries are available in Maven Central. We strongly advise users to adopt Maven, Gradle or another build system for their projects. If you are not familiar with them we suggest taking a look at the maven quickstart projects (javaparser-maven-sample, javasymbolsolver-maven-sample). Just add the following to your maven configuration or tailor to your own dependency management system. Since Version 3.5.10, the JavaParser project includes the JavaSymbolSolver. While JavaParser generates an Abstract Syntax Tree, JavaSymbolSolver analyzes that AST and is able to find the relation between an element and its declaration (e.g. for a variable name it could be a parameter of a method, providing information about its type, position in the AST, ect).

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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