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Add filter composition for clauses

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This commit is contained in:
Ross Nicoll 2016-09-27 12:12:15 +01:00
parent 06a8680d37
commit 607ba634fe
4 changed files with 28 additions and 0 deletions
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1
core/src/main/kotlin/com/r3corda/core/contracts/clauses/AllComposition.kt
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@ -9,6 +9,7 @@ import java.util.*
/**
* Compose a number of clauses, such that all of the clauses must run for verification to pass.
*/
// TODO: Rename to AllOf
class AllComposition<S : ContractState, C : CommandData, K : Any>(firstClause: Clause<S, C, K>, vararg remainingClauses: Clause<S, C, K>) : CompositeClause<S, C, K>() {
override val clauses = ArrayList<Clause<S, C, K>>()

1
core/src/main/kotlin/com/r3corda/core/contracts/clauses/AnyComposition.kt
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@ -9,6 +9,7 @@ import java.util.*
/**
* Compose a number of clauses, such that any number of the clauses can run.
*/
// TODO: Rename to AnyOf
class AnyComposition<in S : ContractState, C : CommandData, in K : Any>(vararg rawClauses: Clause<S, C, K>) : CompositeClause<S, C, K>() {
override val clauses: List<Clause<S, C, K>> = rawClauses.asList()

25
core/src/main/kotlin/com/r3corda/core/contracts/clauses/FilterOn.kt Normal file
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@ -0,0 +1,25 @@
package com.r3corda.core.contracts.clauses
import com.r3corda.core.contracts.AuthenticatedObject
import com.r3corda.core.contracts.CommandData
import com.r3corda.core.contracts.ContractState
import com.r3corda.core.contracts.TransactionForContract
/**
* Filter the states that are passed through to the wrapped clause, to restrict them to a specific type.
*/
class FilterOn<S : ContractState, C : CommandData, K : Any>(val clause: Clause<S, C, K>,
val filterStates: (List<ContractState>) -> List<S>) : Clause<ContractState, C, K>() {
override val requiredCommands: Set<Class<out CommandData>>
= clause.requiredCommands
override fun getExecutionPath(commands: List<AuthenticatedObject<C>>): List<Clause<*, *, *>>
= clause.getExecutionPath(commands)
override fun verify(tx: TransactionForContract,
inputs: List<ContractState>,
outputs: List<ContractState>,
commands: List<AuthenticatedObject<C>>,
groupingKey: K?): Set<C>
= clause.verify(tx, filterStates(inputs), filterStates(outputs), commands, groupingKey)
}

1
core/src/main/kotlin/com/r3corda/core/contracts/clauses/FirstComposition.kt
View File

@ -10,6 +10,7 @@ import java.util.*
/**
* Compose a number of clauses, such that the first match is run, and it errors if none is run.
*/
// TODO: Rename to FirstOf
class FirstComposition<S : ContractState, C : CommandData, K : Any>(val firstClause: Clause<S, C, K>, vararg remainingClauses: Clause<S, C, K>) : CompositeClause<S, C, K>() {
companion object {
val logger = loggerFor<FirstComposition<*, *, *>>()