JDT随记-ASTNode分类生成

现把一些 Java代码生成对应的ASTNode方式列出来，供参考：

List 1 生成Package

// package astexplorer;
java 代码
PackageDeclaration packageDeclaration = ast.newPackageDeclaration();
unit.setPackage(packageDeclaration);
packageDeclaration.setName(ast.newSimpleName("astexplorer"));

List 2 生成Import

// import org.eclipse.swt.SWT;
// import org.eclipse.swt.events.*;
// import org.eclipse.swt.graphics.*;
// import org.eclipse.swt.layout.*;
// import org.eclipse.swt.widgets.*;
java 代码
for (int i = 0; i < IMPORTS.length; ++i) {
ImportDeclaration importDeclaration = ast.newImportDeclaration();
importDeclaration.setName(ast.newName(getSimpleNames(IMPORTS[i])));
if (IMPORTS[i].indexOf("*") > 0)
importDeclaration.setOnDemand(true);
else
importDeclaration.setOnDemand(false);

unit.imports().add(importDeclaration);
}

List 3 生成Class Declaration

// public class SampleComposite extends Composite 

java 代码

TypeDeclaration classType = ast.newTypeDeclaration();
classType.setInterface(false);
classType.setModifiers(Modifier.PUBLIC);
classType.setName(ast.newSimpleName("SampleComposite"));
classType.setSuperclass(ast.newSimpleName("Composite"));
unit.types().add(classType);

List 4 生成Constructor Declaration

// public SampleComposite(Composite parent,int style){}

java 代码

MethodDeclaration methodConstructor = ast.newMethodDeclaration();
methodConstructor.setConstructor(true);
methodConstructor.setModifiers(Modifier.PUBLIC);
methodConstructor.setName(ast.newSimpleName("SampleComposite"));
classType.bodyDeclarations().add(methodConstructor);

// constructor parameters

SingleVariableDeclaration variableDeclaration = ast.newSingleVariableDeclaration();
variableDeclaration.setModifiers(Modifier.NONE);
variableDeclaration.setType(ast.newSimpleType(ast.newSimpleName("Composite")));
variableDeclaration.setName(ast.newSimpleName("parent"));
methodConstructor.parameters().add(variableDeclaration);

variableDeclaration = ast.newSingleVariableDeclaration();
variableDeclaration.setModifiers(Modifier.NONE);
variableDeclaration.setType(ast.newPrimitiveType(PrimitiveType.INT));
variableDeclaration.setName(ast.newSimpleName("style"));
methodConstructor.parameters().add(variableDeclaration);

Block constructorBlock = ast.newBlock();
methodConstructor.setBody(constructorBlock);

 List 5 生成Spuer Invocation

// super(parent,style)

java 代码

SuperConstructorInvocation superConstructorInvocation = ast.newSuperConstructorInvocation();
constructorBlock.statements().add(superConstructorInvocation);
Expression exp = ast.newSimpleName("parent");
superConstructorInvocation.arguments().add(exp);
superConstructorInvocation.arguments().add(ast.newSimpleName("style"));

List 6 生成ClassInstanceCreation

// GridLayout gridLayout = new GridLayout();

java 代码

VariableDeclarationFragment vdf = ast.newVariableDeclarationFragment();
vdf.setName(ast.newSimpleName("gridLayout"));
ClassInstanceCreation cc = ast.newClassInstanceCreation();
cc.setName(ast.newSimpleName("GridLayout"));
vdf.setInitializer(cc);
VariableDeclarationStatement vds = ast.newVariableDeclarationStatement(vdf);
vds.setType(ast.newSimpleType(ast.newSimpleName("GridLayout")));
constructBlock.statements().add(vds);

// Label label = new Label(this,SWT.NONE);

java 代码

VariableDeclarationFragment vdf = ast.newVariableDeclarationFragment();
vdf.setName(ast.newSimpleName("label"));
cc = ast.newClassInstanceCreation();
cc.setName(ast.newSimpleName("Label"));
cc.arguments().add(ast.newThisExpression());
cc.arguments().add(ast.newName(getSimpleNames("SWT.NONE")));
vdf.setInitializer(cc);
VariableDeclarationStatement vds = ast.newVariableDeclarationStatement(vdf);
vds.setType(ast.newSimpleType(ast.newSimpleName("Label")));
constructBlock.statements().add(vds);

List 7生成MethodInvocation

// setLayout(gridLayout);

java 代码

MethodInvocation mi = ast.newMethodInvocation();
mi.setName(ast.newSimpleName("setLayout"));
mi.arguments().add(ast.newSimpleName("gridLayout"));
constructorBlock.statements().add(ast.newExpressionStatement(mi));

// label.setText("Press the button to close:");

         java 代码

mi = ast.newMethodInvocation();
mi.setExpression(ast.newSimpleName("label"));
mi.setName(ast.newSimpleName("setText"));
StringLiteral sl = ast.newStringLiteral();
sl.setLiteralValue("Press the button to close:");
mi.arguments().add(sl);
constructorBlock.statements().add(ast.newExpressionStatement(mi));

// label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_CENTER));

           java 代码
mi = ast.newMethodInvocation();
mi.setExpression(ast.newSimpleName("label"));
mi.setName(ast.newSimpleName("setLayoutData"));

cc = ast.newClassInstanceCreation();
cc.setName(ast.newSimpleName("GridData"));
cc.arguments().add(ast.newName(getSimpleNames("GridData.HORIZONTAL_ALIGN_CENTER")));
mi.arguments().add(cc);
constructorBlock.statements().add(ast.newExpressionStatement(mi));

 // Button button = new Button(this,SWT.PUSH);
java 代码


vdf = ast.newVariableDeclarationFragment();
vdf.setName(ast.newSimpleName("button"));
vds = ast.newVariableDeclarationStatement(vdf);
vds.setType(ast.newSimpleType(ast.newSimpleName("Button")));
constructorBlock.statements().add(vds);

cc = ast.newClassInstanceCreation();
cc.setName(ast.newSimpleName("Button"));
vdf.setInitializer(cc);
cc.arguments().add(ast.newThisExpression());
cc.arguments().add(ast.newName(getSimpleNames("SWT.PUSH")));


// button.addSelectionListener(new SelectionAdapter() {}); 
    java 代码


mi = ast.newMethodInvocation();
constructorBlock.statements().add(ast.newExpressionStatement(mi));
mi.setExpression(ast.newSimpleName("button"));
mi.setName(ast.newSimpleName("addSelectionListener"));

ClassInstanceCreation ci = ast.newClassInstanceCreation();
ci.setName(ast.newSimpleName("SelectionAdapter"));
mi.arguments().add(ci);
AnonymousClassDeclaration cd = ast.newAnonymousClassDeclaration();
ci.setAnonymousClassDeclaration(cd);

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JDT 随记---介绍

• 2007-12-05 19:18
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评论

1 楼 upupsky 2008-06-20  

怎么在一个java语句之前添加一个MethodInvocation?
比如有条语句 Sytem.out.println("World");

而我要在之前加入Sytem.out.print("Hello ");

相应的步骤应该是:
1.遍历源代码,找出Sytem.out.println("World");语句
2.在其之前加入Sytem.out.print("Hello ");
3.将修改后的代码存入文件.

具体应该怎么做?

有劳!