如何以编程方式访问Eclipse变量池？

import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTVisitor;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.core.dom.FieldDeclaration;
import org.eclipse.jdt.core.dom.VariableDeclarationFragment;
import org.eclipse.jdt.core.dom.VariableDeclarationStatement;
import org.eclipse.jdt.core.dom.VariableDeclarationExpression;
import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.SimpleName;
import org.eclipse.jdt.core.dom.TypeDeclaration;
import org.eclipse.jdt.core.dom.Type;
import org.eclipse.jdt.core.dom.Modifier;

public class VariablePoolAccess {

    public static void main(String[] args) {
        // 获取当前项目的IJavaProject对象
        IJavaProject javaProject = ...; // 请根据实际情况获取当前项目的IJavaProject对象

        try {
            // 获取项目中的所有类型
            IType[] types = javaProject.getAllTypes();

            // 遍历所有类型
            for (IType type : types) {
                // 获取类型的AST树
                CompilationUnit compilationUnit = parse(type);

                // 遍历AST树，查找变量声明
                compilationUnit.accept(new ASTVisitor() {
                    @Override
                    public boolean visit(FieldDeclaration node) {
                        // 获取变量声明的类型
                        Type variableType = node.getType();

                        // 获取变量声明的修饰符
                        int modifiers = node.getModifiers();

                        // 获取变量声明的所有片段
                        for (Object fragment : node.fragments()) {
                            if (fragment instanceof VariableDeclarationFragment) {
                                VariableDeclarationFragment variableFragment = (VariableDeclarationFragment) fragment;

                                // 获取变量名
                                SimpleName variableName = variableFragment.getName();

                                // 在这里可以对变量进行操作，例如读取、修改、删除等
                                // ...

                                // 打印变量信息
                                System.out.println("Variable: " + variableName + ", Type: " + variableType + ", Modifiers: " + Modifier.toString(modifiers));
                            }
                        }

                        return super.visit(node);
                    }

                    // 其他相关方法的实现，例如访问方法声明等
                    // ...
                });
            }
        } catch (JavaModelException e) {
            e.printStackTrace();
        }
    }

    // 解析类型的AST树
    private static CompilationUnit parse(IType type) throws JavaModelException {
        ASTParser parser = ASTParser.newParser(AST.JLS14);
        parser.setSource(type.getCompilationUnit());
        parser.setKind(ASTParser.K_COMPILATION_UNIT);
        return (CompilationUnit) parser.createAST(null);
    }
}