Implement StructElement by delegation

Author: tughi

app/src/main/java/com/tughi/aggregator/ion/CustomElement.kt

@@ -1,71 +1,18 @@
 package com.tughi.aggregator.ion
 
-import com.amazon.ion.IonWriter
-import com.amazon.ionelement.api.AnyElement
 import com.amazon.ionelement.api.ElementType
 import com.amazon.ionelement.api.IonElement
-import com.amazon.ionelement.api.MetaContainer
 import com.amazon.ionelement.api.StructElement
-import com.amazon.ionelement.api.StructField
 import com.amazon.ionelement.api.location
 import com.amazon.ionelement.api.locationToString
 
-abstract class CustomElement internal constructor(private val structElement: StructElement, validate: Boolean) : StructElement {
+abstract class CustomElement internal constructor(structElement: StructElement, validate: Boolean) : StructElement by structElement {
     init {
         if (validate) {
             validate()
         }
     }
 
-    override val annotations: List<String>
-        get() = structElement.annotations
-
-    override val fields: Collection<StructField>
-        get() = structElement.fields
-
-    override val isNull: Boolean
-        get() = structElement.isNull
-
-    override val metas: MetaContainer
-        get() = structElement.metas
-
-    override val size: Int
-        get() = structElement.size
-
-    override val type: ElementType
-        get() = structElement.type
-
-    override val values: Collection<AnyElement>
-        get() = structElement.values
-
-    override fun asAnyElement() = structElement.asAnyElement()
-
-    override fun containsField(fieldName: String) = structElement.containsField(fieldName)
-
-    override fun copy(annotations: List<String>, metas: MetaContainer) = structElement.copy(annotations, metas)
-
-    override fun get(fieldName: String) = structElement.get(fieldName)
-
-    override fun getAll(fieldName: String) = structElement.getAll(fieldName)
-
-    override fun getOptional(fieldName: String) = structElement.getOptional(fieldName)
-
-    override fun toString() = structElement.toString()
-
-    override fun withAnnotations(vararg additionalAnnotations: String) = structElement.withAnnotations(*additionalAnnotations)
-
-    override fun withAnnotations(additionalAnnotations: Iterable<String>) = structElement.withAnnotations(additionalAnnotations)
-
-    override fun withMeta(key: String, value: Any) = structElement.withMeta(key, value)
-
-    override fun withMetas(additionalMetas: MetaContainer) = structElement.withMetas(additionalMetas)
-
-    override fun withoutAnnotations() = structElement.withoutAnnotations()
-
-    override fun withoutMetas() = structElement.withoutMetas()
-
-    override fun writeTo(writer: IonWriter) = structElement.writeTo(writer)
-
     abstract fun validate()
 
     protected fun checkAnnotation(annotation: String) {