org.eclipse.jdt.core.dom.WildcardType#isUpperBound ( )源码实例Demo

public boolean visit(WildcardType type) {
	/*
	 * WildcardType: ? [ ( extends | super) Type ]
	 */
	activateDiffStyle(type);
	appendQuestionMark();
	if(type.getBound() != null) {
		if (type.isUpperBound()) {
			styledString.append("extends", determineDiffStyle(type, new StyledStringStyler(keywordStyle)));
		} else {
			styledString.append("super", determineDiffStyle(type, new StyledStringStyler(keywordStyle)));
		}
		handleType(type.getBound());
	}
	deactivateDiffStyle(type);
	return false;
}
 

@Override
public boolean visit(final WildcardType node) {
  this.appendToBuffer("?");
  Type bound = node.getBound();
  if ((bound != null)) {
    boolean _isUpperBound = node.isUpperBound();
    if (_isUpperBound) {
      this.appendToBuffer(" extends ");
    } else {
      this.appendToBuffer(" super ");
    }
    bound.accept(this);
  }
  return false;
}
 

/**
 * @param type
 * @return
 */
protected String getNameOfType(final Type type) {
	 String nameOfType = "";
	if (type != null) {
		if (type.isPrimitiveType()) {
			nameOfType = type.toString();
		} else if (type.isParameterizedType()) {
			nameOfType = getParametrizedType((ParameterizedType) type);
		} else if (type.isArrayType()) {
			final ArrayType array = (ArrayType) type;
			nameOfType = getNameOfType(array.getElementType()) /*+ "[]"*/;
		} else if (type.isUnionType()) {
               // TODO: this is used for exceptions till now
               // So we will just capture the first type that we encounter
			final UnionType uType = (UnionType) type;
			final StringBuilder sb = new StringBuilder();
			for (final Object unionedType : uType.types()) {
				sb.append(getNameOfType((Type) unionedType));
                   break;
			}

			nameOfType = sb.toString();
		} else if (type.isWildcardType()) {
			final WildcardType wType = (WildcardType) type;
			nameOfType = (wType.isUpperBound() ? "? extends " : "? super ")
					+ getNameOfType(wType.getBound());
		} else {
			nameOfType = getFullyQualifiedNameFor(type.toString());
		}
	}
	return nameOfType;
}
 

/**
 * @param type
 * @return
 */
protected String getNameOfType(final Type type) {
	final String nameOfType;
	if (type.isPrimitiveType()) {
		nameOfType = type.toString();
	} else if (type.isParameterizedType()) {
		nameOfType = getParametrizedType((ParameterizedType) type);
	} else if (type.isArrayType()) {
		final ArrayType array = (ArrayType) type;
		nameOfType = getNameOfType(array.getElementType()) + "[]";
	} else if (type.isUnionType()) {
		final UnionType uType = (UnionType) type;
		final StringBuffer sb = new StringBuffer();
		for (final Object unionedType : uType.types()) {
			sb.append(getNameOfType(((Type) unionedType)));
			sb.append(" | ");
		}
		sb.delete(sb.length() - 3, sb.length());
		nameOfType = sb.toString();
	} else if (type.isWildcardType()) {
		final WildcardType wType = (WildcardType) type;
		if (wType.getBound() == null)
			return "?";
		nameOfType = (wType.isUpperBound() ? "? extends " : "? super ") + getNameOfType(wType.getBound());
	} else {
		nameOfType = getFullyQualifiedNameFor(type.toString());
	}
	return nameOfType;
}
 

public boolean visit(WildcardType type) {
	if(type.getBound() != null) {
		if (type.isUpperBound()) {
			bindingKeys.add("extends");
		} else {
			bindingKeys.add("super");
		}
		handleType(type.getBound());
	}
	return false;
}
 

private static void getFullyQualifiedName(Type type, StringBuffer buffer) {
	switch (type.getNodeType()) {
		case ASTNode.ARRAY_TYPE:
			ArrayType arrayType = (ArrayType) type;
			getFullyQualifiedName(arrayType.getElementType(), buffer);
			for (int i = 0, length = arrayType.getDimensions(); i < length; i++) {
				buffer.append('[');
				buffer.append(']');
			}
			break;
		case ASTNode.PARAMETERIZED_TYPE:
			ParameterizedType parameterizedType = (ParameterizedType) type;
			getFullyQualifiedName(parameterizedType.getType(), buffer);
			buffer.append('<');
			Iterator iterator = parameterizedType.typeArguments().iterator();
			boolean isFirst = true;
			while (iterator.hasNext()) {
				if (!isFirst)
					buffer.append(',');
				else
					isFirst = false;
				Type typeArgument = (Type) iterator.next();
				getFullyQualifiedName(typeArgument, buffer);
			}
			buffer.append('>');
			break;
		case ASTNode.PRIMITIVE_TYPE:
			buffer.append(((PrimitiveType) type).getPrimitiveTypeCode().toString());
			break;
		case ASTNode.QUALIFIED_TYPE:
			buffer.append(((QualifiedType) type).getName().getFullyQualifiedName());
			break;
		case ASTNode.SIMPLE_TYPE:
			buffer.append(((SimpleType) type).getName().getFullyQualifiedName());
			break;
		case ASTNode.WILDCARD_TYPE:
			buffer.append('?');
			WildcardType wildcardType = (WildcardType) type;
			Type bound = wildcardType.getBound();
			if (bound == null) return;
			if (wildcardType.isUpperBound()) {
				buffer.append(" extends "); //$NON-NLS-1$
			} else {
				buffer.append(" super "); //$NON-NLS-1$
			}
			getFullyQualifiedName(bound, buffer);
			break;
	}
}