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Generate optimized toString() (#957)

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* Generate optimized toString()

This optimizes `toString()` functions to emit separate strings for the enclosing prefix and the adapter name

Example:

```kotlin
override fun toString(): String = buildString {
    append("GeneratedJsonAdapter(").append("SmokeTestType").append(")") }
```

* Optimize with capacity and char
This commit is contained in:
Zac Sweers
2019-10-19 16:11:51 -04:00
committed by GitHub
parent 2cf3f0204c
commit 870fee4332
1 changed files with 13 additions and 2 deletions
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15
kotlin/codegen/src/main/java/com/squareup/moshi/kotlin/codegen/api/AdapterGenerator.kt
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@@ -21,6 +21,7 @@ import com.squareup.kotlinpoet.CodeBlock
import com.squareup.kotlinpoet.FileSpec
import com.squareup.kotlinpoet.FunSpec
import com.squareup.kotlinpoet.KModifier
import com.squareup.kotlinpoet.MemberName
import com.squareup.kotlinpoet.NameAllocator
import com.squareup.kotlinpoet.ParameterSpec
import com.squareup.kotlinpoet.ParameterizedTypeName
@@ -39,6 +40,8 @@ import java.lang.reflect.Constructor
import java.lang.reflect.Type
private val MOSHI_UTIL = Util::class.asClassName()
private const val TO_STRING_PREFIX = "GeneratedJsonAdapter("
private const val TO_STRING_SIZE_BASE = TO_STRING_PREFIX.length + 1 // 1 is the closing paren
/** Generates a JSON adapter for a target type. */
internal class AdapterGenerator(
@@ -155,11 +158,19 @@ internal class AdapterGenerator(
}
private fun generateToStringFun(): FunSpec {
val name = originalTypeName.rawType().simpleNames.joinToString(".")
val size = TO_STRING_SIZE_BASE + name.length
return FunSpec.builder("toString")
.addModifiers(KModifier.OVERRIDE)
.returns(String::class)
.addStatement("return %S",
"GeneratedJsonAdapter(${originalTypeName.rawType().simpleNames.joinToString(".")})")
.addStatement(
"return %M(%L)·{ append(%S).append(%S).append('%L') }",
MemberName("kotlin.text", "buildString"),
size,
TO_STRING_PREFIX,
name,
")"
)
.build()
}