| /* |
| * Copyright 2005 Sascha Weinreuter |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.intellij.lang.xpath.psi; |
| |
| import org.jetbrains.annotations.NotNull; |
| |
| public class XPathType { |
| public static final XPathType UNKNOWN = new XPathType("unknown", true); |
| public static final XPathType ANY = new XPathType("any", true); |
| |
| public static final XPathType NUMBER = new XPathType("number", false); |
| public static final XPathType BOOLEAN = new XPathType("boolean", false); |
| public static final XPathType STRING = new XPathType("string", false); |
| public static final XPathType NODESET = new XPathType("nodeset", false); |
| |
| protected final String type; |
| private final boolean myAbstract; |
| |
| protected XPathType(String s, boolean isAbstract) { |
| type = s; |
| myAbstract = isAbstract; |
| } |
| |
| public String toString() { |
| return "XPathType: " + type; |
| } |
| |
| public String getName() { |
| return type; |
| } |
| |
| public boolean isAbstract() { |
| return myAbstract; |
| } |
| |
| public static XPathType getSuperType(XPathType type) { |
| return type instanceof XPath2Type ? ((XPath2Type)type).getSuperType() : null; |
| } |
| |
| public static XPathType fromString(String value) { |
| if ("string".equals(value)) { |
| return XPathType.STRING; |
| } else if ("number".equals(value)) { |
| return XPathType.NUMBER; |
| } else if ("boolean".equals(value)) { |
| return XPathType.BOOLEAN; |
| } else if ("nodeset".equals(value)) { |
| return XPathType.NODESET; |
| } |
| return XPathType.UNKNOWN; |
| } |
| |
| public boolean isAssignableFrom(XPathType type) { |
| return isAbstract() || type.isAbstract() || this != NODESET || type == NODESET; |
| } |
| |
| public boolean canBePromotedTo(XPathType type) { |
| return type != NODESET; |
| } |
| |
| public static boolean isAssignable(@NotNull XPathType left, @NotNull XPathType type) { |
| if (left instanceof ChoiceType) { |
| final XPathType[] types = ((ChoiceType)left).getTypes(); |
| for (XPathType t : types) { |
| if (isAssignable(t, type)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| return left.isAssignableFrom(type) || type.canBePromotedTo(left); |
| } |
| |
| public static final class ChoiceType extends XPathType { |
| private final XPathType[] myTypes; |
| |
| ChoiceType(XPathType[] types, String name) { |
| super(name, true); |
| myTypes = types; |
| } |
| |
| public static XPathType create(XPathType... types) { |
| final StringBuilder name = new StringBuilder(); |
| for (XPathType type : types) { |
| if (name.length() > 0) { |
| name.append(", "); |
| } |
| name.append(type.getName()); |
| } |
| name.insert(0, "one of "); |
| return new ChoiceType(types, name.toString()); |
| } |
| |
| public XPathType[] getTypes() { |
| return myTypes; |
| } |
| |
| @Override |
| public boolean isAssignableFrom(@NotNull XPathType type) { |
| return false; |
| } |
| |
| @Override |
| public boolean canBePromotedTo(XPathType type) { |
| return false; |
| } |
| } |
| } |