Java EnhancedForStatement.setExpression方法代码示例

import org.eclipse.jdt.core.dom.EnhancedForStatement; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
private EnhancedForStatement makeReplacementForLoop(EntrySetResolutionVisitor visitor) {
    // this would be map.keySet().
    // We need this to get the type of map and get the variable name of map
    MethodInvocation oldLoopExpression = (MethodInvocation) visitor.ancestorForLoop.getExpression();

    // for(Parameter : Expression)
    EnhancedForStatement replacement = ast.newEnhancedForStatement();
    replacement.setParameter(makeEntrySetParameter(oldLoopExpression));
    replacement.setExpression(makeCallToEntrySet(oldLoopExpression));

    List<Statement> replacementBlockStatements = ((Block) replacement.getBody()).statements();
    // create new statement to replace the key object (e.g. the String s that used to be in the for each)
    replacementBlockStatements.add(makeNewKeyStatement(visitor));
    // replace the call to map.get() with a call to entry.getValue()
    replacementBlockStatements.add(makeNewValueStatement(visitor));
    // transfer the rest of the statements in the old block
    copyRestOfBlock(replacementBlockStatements, visitor);
    return replacement;
}
 

import org.eclipse.jdt.core.dom.EnhancedForStatement; //导入方法依赖的package包/类
/**
 * Helper to generate a <code>foreach</code> loop to iterate over an {@link Iterable}.
 *
 * @param ast the {@link AST} instance to rewrite the loop to
 * @return the complete {@link ASTRewrite} object
 */
private ASTRewrite generateForEachRewrite(AST ast) {

  EnhancedForStatement loopStatement = ast.newEnhancedForStatement();

  ASTRewrite rewrite = ASTRewrite.create(ast);
  ITypeBinding loopOverType = extractElementType(ast);

  // generate name proposals and add them to the variable declaration
  SimpleName forDeclarationName =
      resolveLinkedVariableNameWithProposals(rewrite, loopOverType.getName(), null, true);

  SingleVariableDeclaration forLoopInitializer = ast.newSingleVariableDeclaration();
  forLoopInitializer.setType(
      getImportRewrite()
          .addImport(
              loopOverType,
              ast,
              new ContextSensitiveImportRewriteContext(fCurrentNode, getImportRewrite())));
  forLoopInitializer.setName(forDeclarationName);

  loopStatement.setParameter(forLoopInitializer);
  loopStatement.setExpression((Expression) rewrite.createCopyTarget(fCurrentExpression));

  Block forLoopBody = ast.newBlock();
  forLoopBody.statements().add(createBlankLineStatementWithCursorPosition(rewrite));

  loopStatement.setBody(forLoopBody);

  rewrite.replace(fCurrentNode, loopStatement, null);

  return rewrite;
}
 

import org.eclipse.jdt.core.dom.EnhancedForStatement; //导入方法依赖的package包/类
@Override
protected Statement convert(CompilationUnitRewrite cuRewrite, TextEditGroup group, LinkedProposalModel positionGroups) throws CoreException {
	ASTRewrite rewrite= cuRewrite.getASTRewrite();
	ImportRewrite importRewrite= cuRewrite.getImportRewrite();

	ForStatement forStatement= getForStatement();

	IJavaProject javaProject= ((CompilationUnit)forStatement.getRoot()).getJavaElement().getJavaProject();
	String[] proposals= getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);

	String parameterName;
	if (fElementDeclaration != null) {
		parameterName= fElementDeclaration.getName().getIdentifier();
	} else {
		parameterName= proposals[0];
	}

	LinkedProposalPositionGroup pg= positionGroups.getPositionGroup(parameterName, true);
	if (fElementDeclaration != null)
		pg.addProposal(parameterName, null, 10);
	for (int i= 0; i < proposals.length; i++) {
		pg.addProposal(proposals[i], null, 10);
	}

	AST ast= forStatement.getAST();
	EnhancedForStatement result= ast.newEnhancedForStatement();

	SingleVariableDeclaration parameterDeclaration= createParameterDeclaration(parameterName, fElementDeclaration, fArrayAccess, forStatement, importRewrite, rewrite, group, pg, fMakeFinal);
	result.setParameter(parameterDeclaration);

	result.setExpression((Expression)rewrite.createCopyTarget(fArrayAccess));

	convertBody(forStatement.getBody(), fIndexBinding, fArrayBinding, parameterName, rewrite, group, pg);
	result.setBody(getBody(cuRewrite, group, positionGroups));

	positionGroups.setEndPosition(rewrite.track(result));

	return result;
}
 

import org.eclipse.jdt.core.dom.EnhancedForStatement; //导入方法依赖的package包/类
@Override
protected Statement convert(
    CompilationUnitRewrite cuRewrite, TextEditGroup group, LinkedProposalModel positionGroups)
    throws CoreException {
  ASTRewrite rewrite = cuRewrite.getASTRewrite();
  ImportRewrite importRewrite = cuRewrite.getImportRewrite();

  ForStatement forStatement = getForStatement();

  IJavaProject javaProject =
      ((CompilationUnit) forStatement.getRoot()).getJavaElement().getJavaProject();
  String[] proposals = getVariableNameProposals(fArrayAccess.resolveTypeBinding(), javaProject);

  String parameterName;
  if (fElementDeclaration != null) {
    parameterName = fElementDeclaration.getName().getIdentifier();
  } else {
    parameterName = proposals[0];
  }

  LinkedProposalPositionGroup pg = positionGroups.getPositionGroup(parameterName, true);
  if (fElementDeclaration != null) pg.addProposal(parameterName, null, 10);
  for (int i = 0; i < proposals.length; i++) {
    pg.addProposal(proposals[i], null, 10);
  }

  AST ast = forStatement.getAST();
  EnhancedForStatement result = ast.newEnhancedForStatement();

  SingleVariableDeclaration parameterDeclaration =
      createParameterDeclaration(
          parameterName,
          fElementDeclaration,
          fArrayAccess,
          forStatement,
          importRewrite,
          rewrite,
          group,
          pg,
          fMakeFinal);
  result.setParameter(parameterDeclaration);

  result.setExpression((Expression) rewrite.createCopyTarget(fArrayAccess));

  convertBody(
      forStatement.getBody(), fIndexBinding, fArrayBinding, parameterName, rewrite, group, pg);
  result.setBody(getBody(cuRewrite, group, positionGroups));

  positionGroups.setEndPosition(rewrite.track(result));

  return result;
}
 

import org.eclipse.jdt.core.dom.EnhancedForStatement; //导入方法依赖的package包/类
/**
 * Helper to generate a <code>foreach</code> loop to iterate over an {@link Iterable}.
 * 
 * @param ast the {@link AST} instance to rewrite the loop to
 * @return the complete {@link ASTRewrite} object
 */
private ASTRewrite generateForEachRewrite(AST ast) {

	EnhancedForStatement loopStatement= ast.newEnhancedForStatement();

	ASTRewrite rewrite= ASTRewrite.create(ast);
	ITypeBinding loopOverType= extractElementType(ast);

	// generate name proposals and add them to the variable declaration
	SimpleName forDeclarationName= resolveLinkedVariableNameWithProposals(rewrite, loopOverType.getName(), null, true);

	SingleVariableDeclaration forLoopInitializer= ast.newSingleVariableDeclaration();
	forLoopInitializer.setType(getImportRewrite().addImport(loopOverType, ast, new ContextSensitiveImportRewriteContext(fCurrentNode, getImportRewrite())));
	forLoopInitializer.setName(forDeclarationName);

	loopStatement.setParameter(forLoopInitializer);
	loopStatement.setExpression((Expression) rewrite.createCopyTarget(fCurrentExpression));

	Block forLoopBody= ast.newBlock();
	forLoopBody.statements().add(createBlankLineStatementWithCursorPosition(rewrite));

	loopStatement.setBody(forLoopBody);

	rewrite.replace(fCurrentNode, loopStatement, null);

	return rewrite;
}