make Type & Entry destroyable

src/main/java/com/reandroid/arsc/array/EntryArray.java

@@ -29,6 +29,14 @@ public class EntryArray extends OffsetBlockArray<Entry> implements JSONConvert<J
     public EntryArray(IntegerArray offsets, IntegerItem itemCount, IntegerItem itemStart){
         super(offsets, itemCount, itemStart);
     }
+    public void destroy(){
+        for(Entry entry:listItems()){
+            if(entry!=null){
+                entry.setNull(true);
+            }
+        }
+        clearChildes();
+    }
     public boolean hasComplexEntry(){
         Entry first = iterator(true).next();
         if(first==null){

src/main/java/com/reandroid/arsc/array/TypeBlockArray.java

@@ -43,6 +43,14 @@ public class TypeBlockArray extends BlockArray<TypeBlock>
     public TypeBlockArray(){
         super();
     }
+    public void destroy(){
+        for(TypeBlock typeBlock:listItems()){
+            if(typeBlock!=null){
+                typeBlock.destroy();
+            }
+        }
+        clearChildes();
+    }
     public void sort(){
         sort(this);
     }

src/main/java/com/reandroid/arsc/chunk/SpecBlock.java

@@ -32,6 +32,10 @@
          this.specFlagsArray = new SpecFlagsArray(header.getEntryCount());
          addChild(specFlagsArray);
      }
+     public void destroy(){
+         setParent(null);
+         getSpecFlagsArray().clear();
+     }
      public SpecFlag getSpecFlag(int id){
          return getSpecFlagsArray().getFlag(id);
      }

src/main/java/com/reandroid/arsc/chunk/TypeBlock.java

@@ -52,6 +52,11 @@ public class TypeBlock extends Chunk<TypeHeader>
         addChild(entryOffsets);
         addChild(mEntryArray);
     }
+    public void destroy(){
+        getEntryArray().destroy();
+        setId(0);
+        setParent(null);
+    }
     public boolean removeNullEntries(int startId){
         startId = 0x0000ffff & startId;
         EntryArray entryArray = getEntryArray();

src/main/java/com/reandroid/arsc/container/SpecTypePair.java

@@ -53,6 +53,10 @@ public class SpecTypePair extends BlockContainer<Block>
     public SpecTypePair(){
         this(new SpecBlock(), new TypeBlockArray());
     }
+    public void destroy(){
+        getSpecBlock().destroy();
+        getTypeBlockArray().destroy();
+    }
     public Entry getAnyEntry(String name){
         for(TypeBlock typeBlock:listTypeBlocks()){
             Entry entry =typeBlock.searchByEntryName(name);