Java TypeParameter类代码示例

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private static void createTypeParameters(
    ImportRewrite imports,
    ImportRewriteContext context,
    AST ast,
    IMethodBinding binding,
    MethodDeclaration decl) {
  ITypeBinding[] typeParams = binding.getTypeParameters();
  List<TypeParameter> typeParameters = decl.typeParameters();
  for (int i = 0; i < typeParams.length; i++) {
    ITypeBinding curr = typeParams[i];
    TypeParameter newTypeParam = ast.newTypeParameter();
    newTypeParam.setName(ast.newSimpleName(curr.getName()));
    ITypeBinding[] typeBounds = curr.getTypeBounds();
    if (typeBounds.length != 1
        || !"java.lang.Object".equals(typeBounds[0].getQualifiedName())) { // $NON-NLS-1$
      List<Type> newTypeBounds = newTypeParam.typeBounds();
      for (int k = 0; k < typeBounds.length; k++) {
        newTypeBounds.add(imports.addImport(typeBounds[k], ast, context));
      }
    }
    typeParameters.add(newTypeParam);
  }
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private static void createTypeParameters(ImportRewrite imports, ImportRewriteContext context, AST ast, IMethodBinding binding, MethodDeclaration decl) {
	ITypeBinding[] typeParams= binding.getTypeParameters();
	List<TypeParameter> typeParameters= decl.typeParameters();
	for (int i= 0; i < typeParams.length; i++) {
		ITypeBinding curr= typeParams[i];
		TypeParameter newTypeParam= ast.newTypeParameter();
		newTypeParam.setName(ast.newSimpleName(curr.getName()));
		ITypeBinding[] typeBounds= curr.getTypeBounds();
		if (typeBounds.length != 1 || !"java.lang.Object".equals(typeBounds[0].getQualifiedName())) {//$NON-NLS-1$
			List<Type> newTypeBounds= newTypeParam.typeBounds();
			for (int k= 0; k < typeBounds.length; k++) {
				newTypeBounds.add(imports.addImport(typeBounds[k], ast, context, TypeLocation.TYPE_BOUND));
			}
		}
		typeParameters.add(newTypeParam);
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private void insertAllMissingTypeTags(ASTRewrite rewriter, TypeDeclaration typeDecl) {
	AST ast= typeDecl.getAST();
	Javadoc javadoc= typeDecl.getJavadoc();
	ListRewrite tagsRewriter= rewriter.getListRewrite(javadoc, Javadoc.TAGS_PROPERTY);

	List<TypeParameter> typeParams= typeDecl.typeParameters();
	for (int i= typeParams.size() - 1; i >= 0; i--) {
		TypeParameter decl= typeParams.get(i);
		String name= '<' + decl.getName().getIdentifier() + '>';
		if (findTag(javadoc, TagElement.TAG_PARAM, name) == null) {
			TagElement newTag= ast.newTagElement();
			newTag.setTagName(TagElement.TAG_PARAM);
			TextElement text= ast.newTextElement();
			text.setText(name);
			newTag.fragments().add(text);
			insertTabStop(rewriter, newTag.fragments(), "typeParam" + i); //$NON-NLS-1$
			insertTag(tagsRewriter, newTag, getPreviousTypeParamNames(typeParams, decl));
		}
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private void addTypeParameters(
    CompilationUnitRewrite imRewrite, List<TypeParameter> list, ITypeBinding parent) {

  ITypeBinding enclosing = parent.getDeclaringClass();
  if (enclosing != null) addTypeParameters(imRewrite, list, enclosing);

  ITypeBinding[] typeParameters = parent.getTypeParameters();
  for (int i = 0; i < typeParameters.length; i++) {
    TypeParameter ntp = imRewrite.getAST().newTypeParameter();
    ntp.setName(imRewrite.getAST().newSimpleName(typeParameters[i].getName()));
    ITypeBinding[] bounds = typeParameters[i].getTypeBounds();
    for (int j = 0; j < bounds.length; j++)
      if (!"java.lang.Object".equals(bounds[j].getQualifiedName())) // $NON-NLS-1$
      ntp.typeBounds().add(imRewrite.getImportRewrite().addImport(bounds[j], imRewrite.getAST()));
    list.add(ntp);
  }
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
/**
 * Copies the constructor's parent type's type parameters, if any, as method type parameters of
 * the new static factory method. (Recall that static methods can't refer to type arguments of the
 * enclosing class, since they have no instance to serve as a context.)<br>
 * Makes sure to copy the bounds from the owning type, to ensure that the return type of the
 * factory method satisfies the bounds of the type being instantiated.<br>
 * E.g., for ctor Foo() in the type Foo<T extends Number>, be sure that the factory method is
 * declared as<br>
 * <code>static <T extends Number> Foo<T> createFoo()</code><br>
 * and not simply<br>
 * <code>static <T> Foo<T> createFoo()</code><br>
 * or the compiler will bark.
 *
 * @param ast utility object needed to create ASTNode's for the new method
 * @param newMethod the method onto which to copy the type parameters
 */
private void copyTypeParameters(AST ast, MethodDeclaration newMethod) {
  ITypeBinding[] ctorOwnerTypeParms = fCtorBinding.getDeclaringClass().getTypeParameters();
  List<TypeParameter> factoryMethodTypeParms = newMethod.typeParameters();
  for (int i = 0; i < ctorOwnerTypeParms.length; i++) {
    TypeParameter newParm = ast.newTypeParameter();
    ITypeBinding[] parmTypeBounds = ctorOwnerTypeParms[i].getTypeBounds();
    List<Type> newParmBounds = newParm.typeBounds();

    newParm.setName(ast.newSimpleName(ctorOwnerTypeParms[i].getName()));
    for (int b = 0; b < parmTypeBounds.length; b++) {
      if (parmTypeBounds[b].isClass() && parmTypeBounds[b].getSuperclass() == null) continue;

      Type newBound = fImportRewriter.addImport(parmTypeBounds[b], ast);

      newParmBounds.add(newBound);
    }
    factoryMethodTypeParms.add(newParm);
  }
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private void insertAllMissingTypeTags(ASTRewrite rewriter, TypeDeclaration typeDecl) {
  AST ast = typeDecl.getAST();
  Javadoc javadoc = typeDecl.getJavadoc();
  ListRewrite tagsRewriter = rewriter.getListRewrite(javadoc, Javadoc.TAGS_PROPERTY);

  List<TypeParameter> typeParams = typeDecl.typeParameters();
  for (int i = typeParams.size() - 1; i >= 0; i--) {
    TypeParameter decl = typeParams.get(i);
    String name = '<' + decl.getName().getIdentifier() + '>';
    if (findTag(javadoc, TagElement.TAG_PARAM, name) == null) {
      TagElement newTag = ast.newTagElement();
      newTag.setTagName(TagElement.TAG_PARAM);
      TextElement text = ast.newTextElement();
      text.setText(name);
      newTag.fragments().add(text);
      insertTabStop(rewriter, newTag.fragments(), "typeParam" + i); // $NON-NLS-1$
      insertTag(tagsRewriter, newTag, getPreviousTypeParamNames(typeParams, decl));
    }
  }
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private static void addTypeParameters(final CompilationUnit unit, final IType type, final Map<String, ITypeBinding> map) throws JavaModelException {
	Assert.isNotNull(unit);
	Assert.isNotNull(type);
	Assert.isNotNull(map);
	final AbstractTypeDeclaration declaration= ASTNodeSearchUtil.getAbstractTypeDeclarationNode(type, unit);
	if (declaration instanceof TypeDeclaration) {
		ITypeBinding binding= null;
		TypeParameter parameter= null;
		for (final Iterator<TypeParameter> iterator= ((TypeDeclaration) declaration).typeParameters().iterator(); iterator.hasNext();) {
			parameter= iterator.next();
			binding= parameter.resolveBinding();
			if (binding != null && !map.containsKey(binding.getKey()))
				map.put(binding.getKey(), binding);
		}
		final IType declaring= type.getDeclaringType();
		if (declaring != null && !JdtFlags.isStatic(type))
			addTypeParameters(unit, declaring, map);
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private void addEnclosingInstanceTypeParameters(final ITypeBinding[] parameters, final AbstractTypeDeclaration declaration, final ASTRewrite rewrite) {
	Assert.isNotNull(parameters);
	Assert.isNotNull(declaration);
	Assert.isNotNull(rewrite);
	if (declaration instanceof TypeDeclaration) {
		final TypeDeclaration type= (TypeDeclaration) declaration;
		final List<TypeParameter> existing= type.typeParameters();
		final Set<String> names= new HashSet<String>();
		TypeParameter parameter= null;
		for (final Iterator<TypeParameter> iterator= existing.iterator(); iterator.hasNext();) {
			parameter= iterator.next();
			names.add(parameter.getName().getIdentifier());
		}
		final ListRewrite rewriter= rewrite.getListRewrite(type, TypeDeclaration.TYPE_PARAMETERS_PROPERTY);
		String name= null;
		for (int index= 0; index < parameters.length; index++) {
			name= parameters[index].getName();
			if (!names.contains(name)) {
				parameter= type.getAST().newTypeParameter();
				parameter.setName(type.getAST().newSimpleName(name));
				rewriter.insertLast(parameter, null);
			}
		}
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private void addTypeParameters(CompilationUnitRewrite imRewrite, List<TypeParameter> list, ITypeBinding parent) {

		ITypeBinding enclosing= parent.getDeclaringClass();
		if (enclosing != null)
			addTypeParameters(imRewrite, list, enclosing);

		ITypeBinding[] typeParameters= parent.getTypeParameters();
		for (int i= 0; i < typeParameters.length; i++) {
			TypeParameter ntp= imRewrite.getAST().newTypeParameter();
			ntp.setName(imRewrite.getAST().newSimpleName(typeParameters[i].getName()));
			ITypeBinding[] bounds= typeParameters[i].getTypeBounds();
			for (int j= 0; j < bounds.length; j++)
				if (!"java.lang.Object".equals(bounds[j].getQualifiedName())) //$NON-NLS-1$
					ntp.typeBounds().add(imRewrite.getImportRewrite().addImport(bounds[j], imRewrite.getAST()));
			list.add(ntp);
		}
	}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
/**
 * Copies the constructor's parent type's type parameters, if any, as
 * method type parameters of the new static factory method. (Recall
 * that static methods can't refer to type arguments of the enclosing
 * class, since they have no instance to serve as a context.)<br>
 * Makes sure to copy the bounds from the owning type, to ensure that the
 * return type of the factory method satisfies the bounds of the type
 * being instantiated.<br>
 * E.g., for ctor Foo() in the type Foo<T extends Number>, be sure that
 * the factory method is declared as<br>
 * <code>static <T extends Number> Foo<T> createFoo()</code><br>
 * and not simply<br>
 * <code>static <T> Foo<T> createFoo()</code><br>
 * or the compiler will bark.
 * @param ast utility object needed to create ASTNode's for the new method
 * @param newMethod the method onto which to copy the type parameters
 */
private void copyTypeParameters(AST ast, MethodDeclaration newMethod) {
	ITypeBinding[] ctorOwnerTypeParms= fCtorBinding.getDeclaringClass().getTypeParameters();
	List<TypeParameter> factoryMethodTypeParms= newMethod.typeParameters();
	for(int i= 0; i < ctorOwnerTypeParms.length; i++) {
           TypeParameter newParm= ast.newTypeParameter();
           ITypeBinding[] parmTypeBounds= ctorOwnerTypeParms[i].getTypeBounds();
           List<Type> newParmBounds= newParm.typeBounds();

           newParm.setName(ast.newSimpleName(ctorOwnerTypeParms[i].getName()));
           for(int b=0; b < parmTypeBounds.length; b++) {
           	if (parmTypeBounds[b].isClass() && parmTypeBounds[b].getSuperclass() == null)
           		continue;

           	Type newBound= fImportRewriter.addImport(parmTypeBounds[b], ast);

               newParmBounds.add(newBound);
           }
		factoryMethodTypeParms.add(newParm);
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private static void createTypeParameters(ImportRewrite imports, ImportRewriteContext context, AST ast, IMethodBinding binding, MethodDeclaration decl) {
	ITypeBinding[] typeParams= binding.getTypeParameters();
	List<TypeParameter> typeParameters= decl.typeParameters();
	for (int i= 0; i < typeParams.length; i++) {
		ITypeBinding curr= typeParams[i];
		TypeParameter newTypeParam= ast.newTypeParameter();
		newTypeParam.setName(ast.newSimpleName(curr.getName()));
		ITypeBinding[] typeBounds= curr.getTypeBounds();
		if (typeBounds.length != 1 || !"java.lang.Object".equals(typeBounds[0].getQualifiedName())) {//$NON-NLS-1$
			List<Type> newTypeBounds= newTypeParam.typeBounds();
			for (int k= 0; k < typeBounds.length; k++) {
				newTypeBounds.add(imports.addImport(typeBounds[k], ast, context));
			}
		}
		typeParameters.add(newTypeParam);
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
private static void addTypeParameters(final CompilationUnit unit, final IType type, final Map<String, ITypeBinding> map) throws JavaModelException {
	Assert.isNotNull(unit);
	Assert.isNotNull(type);
	Assert.isNotNull(map);
	final AbstractTypeDeclaration declaration= ASTNodeSearchUtil.getAbstractTypeDeclarationNode(type, unit);
	if (declaration instanceof TypeDeclaration) {
		ITypeBinding binding= null;
		TypeParameter parameter= null;
		for (final Iterator<TypeParameter> iterator= ((TypeDeclaration) declaration).typeParameters().iterator(); iterator.hasNext();) {
			parameter= iterator.next();
			binding= parameter.resolveBinding();
			if (binding != null && !map.containsKey(binding.getKey()))
				map.put(binding.getKey(), binding);
		}
		final IType declaring= type.getDeclaringType();
		if (declaring != null && !Flags.isStatic(type.getFlags()))
			addTypeParameters(unit, declaring, map);
	}
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
/**
 * Write out the type parameters in the specified list, surrounded by "<" and ">".
 *
 * @param typeParameters      list of TypeParameter objects
 * @param includeClassKeyword if true, each parameter is prefixed with "class "
 */
public void writeTypeParameters(List typeParameters, boolean includeClassKeyword) {
    // If we're writing the implementation of a generic method, include the "template<...>" prefix

    write("<");

    forEach(typeParameters, (TypeParameter typeParameter, boolean first) -> {
        if (!first)
            write(", ");

        if (includeClassKeyword)
            write("class ");
        write(typeParameter.getName().getIdentifier());
    });

    write(">");
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
/**
 * Replaces a name of the parametric type in the superclass.
 */
protected void passOnTypes(List<TypeDeclaration> list) {
    // this list has no superclasses
    if (list.size() < 2) {
        return;
    }
    Type superType = list.get(0).getSuperclassType();
    if (!superType.isParameterizedType()) {
        return;
    }
    ParameterizedType superT = (ParameterizedType)superType;
    TypeDeclaration parentTD = list.get(1);
    for (int i = 0; i < superT.typeArguments().size(); i++) {
        // get a new type
        Type newType = (Type)superT.typeArguments().get(i);
        // get an old type
        SimpleName oldTypeName = ((TypeParameter)parentTD.typeParameters().get(i)).getName();
        String oldType = oldTypeName.getFullyQualifiedName();
        // replace the old type with a new type
        ReplaceTypeVisitor visitor = new ReplaceTypeVisitor(newType, oldType);
        parentTD.accept(visitor);
    }
}
 

import org.eclipse.jdt.core.dom.TypeParameter; //导入依赖的package包/类
/**
 * Initialise the replacements for this type
 * 
 * For example:
 *  T -> JavaObject
 *  U extends Foo -> Foo
 *  V extends U -> Foo
 *  X extends Foo<K> -> Foo<K>
 *  Y extends Foo<Y> -> _j2d_Foo
 * @param node
 */
private void initializeReplacements(TypeDeclaration node) {
	for (Object o : node.typeParameters()) {
		TypeParameter t = (TypeParameter)o;
		if (t.typeBounds().size() == 0) {
			getTypeState().typeReplacements.put(t.resolveBinding(), null);
		} else {
			// TODO This won't work for U extends T, T extends IFoobar
			// The first type in the list is the class, if any
			Type firstType = (Type)t.typeBounds().get(0);
			ITypeBinding itb = firstType.resolveBinding();
			while (itb.isTypeVariable()) {
				itb = itb.getSuperclass();
			}
			/*if (itb.isParameterizedType() && hasTypeVariableArgument(itb)) {
				itb = itb.getErasure();
			}*/
			getTypeState().typeReplacements.put(t.resolveBinding(), itb);
		}
	}
}