Annotated Collection Class Method cannot be converted to Collection ------------------------------------------------------------------- Key: IPROTO-100 URL: https://issues.jboss.org/browse/IPROTO-100 Project: Infinispan ProtoStream Issue Type: Bug Reporter: Ryan Emerson Assignee: Nistor Adrian Priority: Major Fix For: 4.3.0.Alpha9 Reproducing code {code:java} public class MagicKeyStringFilter implements KeyValueFilter<MagicKey, String> { Map<MagicKey, String> allowedEntries; MagicKeyStringFilter() {} MagicKeyStringFilter(Map<MagicKey, String> allowedEntries) { this.allowedEntries = allowedEntries; } @ProtoField(number = 1, collectionImplementation = ArrayList.class) public List<MapPair> getMapEntries() { return new ArrayList<>(); } public void setMapEntries(List<MapPair> entries) { // No-op but has influence on error } } public class MapPair { @ProtoField(number = 1) MagicKey key; @ProtoField(number = 2) String value; MapPair() {} MapPair(Map.Entry<MagicKey, String> entry) { this.key = entry.getKey(); this.value = entry.getValue(); } } {code} {code:java} core/target/generated-test-sources/test-annotations/org/infinispan/stream/MagicKeyStringFilter$___Marshaller89f891e2edf7d63eb676a6effb5379a47edc312b.java:[56,41] incompatible types: org.infinispan.stream.MapPair cannot be converted to java.util.Collection {code} Generated marshaller code: {code:java} /** * WARNING: Generated code! */ @javax.annotation.Generated(value = "org.infinispan.protostream.annotations.impl.processor.AutoProtoSchemaBuilderAnnotationProcessor", comments = "Please do not edit this file!") @SuppressWarnings("unchecked") public final class MagicKeyStringFilter$___Marshaller89f891e2edf7d63eb676a6effb5379a47edc312b extends org.infinispan.protostream.annotations.impl.GeneratedMarshallerBase implements org.infinispan.protostream.RawProtobufMarshaller<org.infinispan.stream.MagicKeyStringFilter> { private org.infinispan.protostream.impl.BaseMarshallerDelegate __md$org$infinispan$stream$MapPair; @Override public Class<org.infinispan.stream.MagicKeyStringFilter> getJavaClass() { return org.infinispan.stream.MagicKeyStringFilter.class; } @Override public String getTypeName() { return "org.infinispan.test.MagicKeyStringFilter"; } @Override public org.infinispan.stream.MagicKeyStringFilter readFrom(org.infinispan.protostream.ImmutableSerializationContext $1, org.infinispan.protostream.RawProtoStreamReader $2) throws java.io.IOException { final org.infinispan.stream.MagicKeyStringFilter o = new org.infinispan.stream.MagicKeyStringFilter(); java.util.ArrayList __c$mapEntries = new java.util.ArrayList(); boolean done = false; while (!done) { final int tag = $2.readTag(); switch (tag) { case 0: done = true; break; case 10: { if (__md$org$infinispan$stream$MapPair == null) __md$org$infinispan$stream$MapPair = ((org.infinispan.protostream.impl.SerializationContextImpl) $1).getMarshallerDelegate(org.infinispan.stream.MapPair.class); int length = $2.readRawVarint32(); int oldLimit = $2.pushLimit(length); org.infinispan.stream.MapPair v = (org.infinispan.stream.MapPair) readMessage(__md$org$infinispan$stream$MapPair, $2); $2.checkLastTagWas(0); $2.popLimit(oldLimit); if (__c$mapEntries == null) __c$mapEntries = new java.util.ArrayList(); __c$mapEntries.add(v); } break; default: { if (!$2.skipField(tag)) done = true; } } } o.setMapEntries(__c$mapEntries); return o; } @Override public void writeTo(org.infinispan.protostream.ImmutableSerializationContext $1, org.infinispan.protostream.RawProtoStreamWriter $2, org.infinispan.stream.MagicKeyStringFilter $3) throws java.io.IOException { final org.infinispan.stream.MagicKeyStringFilter o = (org.infinispan.stream.MagicKeyStringFilter) $3; { final java.util.Collection c = (org.infinispan.stream.MapPair) o.getMapEntries(); if (c != null) for (java.util.Iterator it = c.iterator(); it.hasNext(); ) { final org.infinispan.stream.MapPair v = (org.infinispan.stream.MapPair) it.next(); { if (__md$org$infinispan$stream$MapPair == null) __md$org$infinispan$stream$MapPair = ((org.infinispan.protostream.impl.SerializationContextImpl) $1).getMarshallerDelegate(org.infinispan.stream.MapPair.class); writeNestedMessage(__md$org$infinispan$stream$MapPair, $2, 1, v); } } } } } {code}