xml/dom-openapi/src/com/intellij/util/xml/ui/DomCollectionWrapper.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.ui;
  17
  18 import com.intellij.util.ReflectionUtil;
  19 import com.intellij.util.xml.DomElement;
  20 import com.intellij.util.xml.reflect.DomCollectionChildDescription;
  21 import org.jetbrains.annotations.NotNull;
  22
  23 import java.lang.reflect.InvocationTargetException;
  24 import java.lang.reflect.Method;
  25 import java.util.List;
  26
  27 /**
  28  * @author peter
  29  */
  30 public class DomCollectionWrapper<T> extends DomWrapper<T>{
  31   private final DomElement myDomElement;
  32   private final DomCollectionChildDescription myChildDescription;
  33   private final Method mySetter;
  34   private final Method myGetter;
  35
  36   public DomCollectionWrapper(final DomElement domElement,
  37                               final DomCollectionChildDescription childDescription) {
  38     this(domElement, childDescription,
  39          DomUIFactory.findMethod(ReflectionUtil.getRawType(childDescription.getType()), "setValue"),
  40          DomUIFactory.findMethod(ReflectionUtil.getRawType(childDescription.getType()), "getValue"));
  41   }
  42
  43   public DomCollectionWrapper(final DomElement domElement,
  44                               final DomCollectionChildDescription childDescription,
  45                               final Method setter,
  46                               final Method getter) {
  47     myDomElement = domElement;
  48     myChildDescription = childDescription;
  49     mySetter = setter;
  50     myGetter = getter;
  51   }
  52
  53   @NotNull
  54   public DomElement getExistingDomElement() {
  55     return myDomElement;
  56   }
  57
  58   public DomElement getWrappedElement() {
  59     final List<? extends DomElement> list = myChildDescription.getValues(myDomElement);
  60     return list.isEmpty() ? null : list.get(0);
  61   }
  62
  63   public void setValue(final T value) throws IllegalAccessException, InvocationTargetException {
  64     final List<? extends DomElement> list = myChildDescription.getValues(myDomElement);
  65     final DomElement domElement;
  66     if (list.isEmpty()) {
  67       domElement = myChildDescription.addValue(myDomElement);
  68     } else {
  69       domElement = list.get(0);
  70     }
  71     mySetter.invoke(domElement, value);
  72   }
  73
  74   public T getValue() throws IllegalAccessException, InvocationTargetException {
  75     if (!myDomElement.isValid()) return null;
  76     final List<? extends DomElement> list = myChildDescription.getValues(myDomElement);
  77     return list.isEmpty() ? null : (T)myGetter.invoke(list.get(0));
  78   }
  79
  80 }