xml/dom-impl/src/com/intellij/util/xml/impl/CustomDomChildrenDescriptionImpl.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.util.xml.impl;
  17
  18 import com.intellij.psi.xml.XmlTag;
  19 import com.intellij.psi.xml.XmlFile;
  20 import com.intellij.util.ArrayUtil;
  21 import com.intellij.util.NotNullFunction;
  22 import com.intellij.util.xml.DomElement;
  23 import com.intellij.util.xml.DomReflectionUtil;
  24 import com.intellij.util.xml.JavaMethod;
  25 import com.intellij.util.xml.EvaluatedXmlName;
  26 import com.intellij.util.xml.reflect.CustomDomChildrenDescription;
  27 import org.jetbrains.annotations.NotNull;
  28 import org.jetbrains.annotations.Nullable;
  29
  30 import java.util.List;
  31 import java.util.Collections;
  32 import java.lang.reflect.Type;
  33
  34 /**
  35  * @author peter
  36  */
  37 public class CustomDomChildrenDescriptionImpl extends AbstractDomChildDescriptionImpl implements CustomDomChildrenDescription, AbstractCollectionChildDescription {
  38   @Nullable private final JavaMethod myGetter;
  39   public static final NotNullFunction<DomInvocationHandler,List<XmlTag>> CUSTOM_TAGS_GETTER = new NotNullFunction<DomInvocationHandler, List<XmlTag>>() {
  40     @NotNull
  41     public List<XmlTag> fun(final DomInvocationHandler handler) {
  42       return DomImplUtil.getCustomSubTags(handler, handler.getXmlTag().getSubTags(), handler.getFile());
  43     }
  44   };
  45
  46   public CustomDomChildrenDescriptionImpl(@NotNull final JavaMethod getter) {
  47     this(getter, DomReflectionUtil.extractCollectionElementType(getter.getGenericReturnType()));
  48   }
  49
  50   public CustomDomChildrenDescriptionImpl(@Nullable final JavaMethod getter, @NotNull Type type) {
  51     super(type);
  52     myGetter = getter;
  53   }
  54
  55   @Nullable public JavaMethod getGetterMethod() {
  56     return myGetter;
  57   }
  58
  59   @NotNull
  60   public List<? extends DomElement> getValues(@NotNull final DomInvocationHandler parent) {
  61     if (!parent.getGenericInfo().checkInitialized()) {
  62       return Collections.emptyList();
  63     }
  64     return parent.getCollectionChildren(this, CUSTOM_TAGS_GETTER);
  65   }
  66
  67   @NotNull
  68   public List<? extends DomElement> getValues(@NotNull final DomElement parent) {
  69     final DomInvocationHandler handler = DomManagerImpl.getDomInvocationHandler(parent);
  70     if (handler != null) return getValues(handler);
  71
  72     assert myGetter != null;
  73     return (List<? extends DomElement>)myGetter.invoke(parent, ArrayUtil.EMPTY_OBJECT_ARRAY);
  74   }
  75
  76   public int compareTo(final AbstractDomChildDescriptionImpl o) {
  77     return equals(o) ? 0 : -1;
  78   }
  79
  80   public List<XmlTag> getSubTags(final DomInvocationHandler handler, final XmlTag[] subTags, final XmlFile file) {
  81     return DomImplUtil.getCustomSubTags(handler, subTags, file);
  82   }
  83
  84   public EvaluatedXmlName createEvaluatedXmlName(final DomInvocationHandler parent, final XmlTag childTag) {
  85     return new DummyEvaluatedXmlName(childTag.getLocalName(), childTag.getNamespace());
  86   }
  87 }