com.exactpro.sf.common.messages.IMetadata.kt Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2009-2020 Exactpro (Exactpro Systems Limited)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.exactpro.sf.common.messages
interface IMetadata : Cloneable {
val keys: Set
operator fun get(key: String): Any?
operator fun set(key: String, value: Any)
fun contains(key: String): Boolean
fun remove(key: String)
companion object {
@JvmField
val EMPTY: IMetadata = EmptyMetadata()
}
}
private class EmptyMetadata : IMetadata {
override val keys: Set = emptySet()
override fun get(key: String): Any? = null
override fun set(key: String, value: Any) = Unit
override fun contains(key: String): Boolean = false
override fun remove(key: String) = Unit
override fun clone(): EmptyMetadata = this
}