graphql.kickstart.tools.JavassistProxyHandler.kt Maven / Gradle / Ivy

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Tools to help map a GraphQL schema to existing Java objects.

There is a newer version: 14.0.0

package graphql.kickstart.tools

import javassist.util.proxy.ProxyFactory


/**
 * @author Marcus Thiesen
 */

class JavassistProxyHandler : ProxyHandler {

    private val isEnabled: Boolean =
            try {
                Class.forName("javassist.util.proxy.ProxyFactory")
                true
            } catch (_: ClassNotFoundException) {
                false
            }

    override fun canHandle(resolver: GraphQLResolver<*>?): Boolean {
        return isEnabled && ProxyFactory.isProxyClass(resolver?.javaClass)
    }

    override fun getTargetClass(resolver: GraphQLResolver<*>?): Class<*> = resolver!!.javaClass.superclass
}