feat(dsp-negotiation): implement spi module

data-protocols/dsp/dsp-negotiation/dsp-negotiation-spi/src/main/java/org/eclipse/edc/protocol/dsp/negotiation/spi/NegotiationApiPath.java

@@ -0,0 +1,27 @@
+/*
+ *  Copyright (c) 2023 Fraunhofer Institute for Software and Systems Engineering
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Fraunhofer Institute for Software and Systems Engineering - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.protocol.dsp.negotiation.spi;
+
+public interface NegotiationApiPath {
+
+    String BASE_PATH = "/negotiations/";
+    String INITIAL_CONTRACT_REQUEST = "request";
+    String CONTRACT_REQUEST = "/request";
+    String CONTRACT_OFFER = "/offers";
+    String EVENT = "/events";
+    String AGREEMENT = "/agreement";
+    String VERIFICATION = "/verification";
+    String TERMINATION = "/termination";
+}

data-protocols/dsp/dsp-negotiation/dsp-negotiation-spi/src/main/java/org/eclipse/edc/protocol/dsp/negotiation/spi/NegotiationProperty.java

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+/*
+ *  Copyright (c) 2023 Fraunhofer Institute for Software and Systems Engineering
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Fraunhofer Institute for Software and Systems Engineering - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.protocol.dsp.negotiation.spi;
+
+public interface NegotiationProperty {
+
+    String DELIMITER = ":";
+    String PROCESS_ID = "processId";
+    String EVENT_TYPE = "eventType";
+}

data-protocols/dsp/dsp-negotiation/dsp-negotiation-spi/src/main/java/org/eclipse/edc/protocol/dsp/negotiation/spi/types/NegotiationError.java

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+/*
+ *  Copyright (c) 2023 Fraunhofer Institute for Software and Systems Engineering
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Fraunhofer Institute for Software and Systems Engineering - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.protocol.dsp.negotiation.spi.types;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
+
+import java.util.List;
+import java.util.Objects;
+
+@JsonTypeName("dspace:ContractNegotiationError")
+@JsonDeserialize(builder = NegotiationError.Builder.class)
+public class NegotiationError {
+
+    private String processId;
+
+    private String code;
+
+    private List<String> reasons; // TODO should be object?
+
+    @JsonProperty("dspace:processId")
+    public String getProcessId() {
+        return processId;
+    }
+
+    @JsonProperty("dspace:code")
+    public String getCode() {
+        return code;
+    }
+
+    @JsonProperty("dspace:reason")
+    public List<String> getReasons() {
+        return reasons;
+    }
+
+    @JsonPOJOBuilder(withPrefix = "")
+    public static class Builder {
+        private final NegotiationError error;
+
+        private Builder() {
+            error = new NegotiationError();
+        }
+
+        @JsonCreator
+        public static NegotiationError.Builder newInstance() {
+            return new NegotiationError.Builder();
+        }
+
+        public NegotiationError.Builder processId(String processId) {
+            error.processId = processId;
+            return this;
+        }
+
+        public NegotiationError.Builder code(String code) {
+            error.code = code;
+            return this;
+        }
+
+        public NegotiationError.Builder reasons(List<String> reasons) {
+            error.reasons = reasons;
+            return this;
+        }
+
+        public NegotiationError build() {
+            Objects.requireNonNull(error.processId, "The processId must be specified");
+            Objects.requireNonNull(error.code, "The code must be specified");
+
+            return error;
+        }
+    }
+}

data-protocols/dsp/dsp-negotiation/dsp-negotiation-spi/src/main/java/org/eclipse/edc/protocol/dsp/negotiation/spi/types/NegotiationEventType.java

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+/*
+ *  Copyright (c) 2023 Fraunhofer Institute for Software and Systems Engineering
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Fraunhofer Institute for Software and Systems Engineering - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.protocol.dsp.negotiation.spi.types;
+
+public interface NegotiationEventType {
+
+    String ACCEPTED = "ACCEPTED";
+    String FINALIZED = "FINALIZED";
+
+}