Implement PNFD Model driven conversion

Change-Id: I7427e82353cac17817457294d78953f867d2d6e8
Issue-ID: SDC-2509
Signed-off-by: andre.schmid <andre.schmid@est.tech>

13 files changed, 659 insertions, 29 deletions

diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/api/ToscaConverterManager.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/api/ToscaConverterManager.java
deleted file mode 100644
index f10c724375..0000000000
--- a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/api/ToscaConverterManager.java
+++ /dev/null
@@ -1,29 +0,0 @@
-/*-
- * ============LICENSE_START=======================================================
- * SDC
- * ================================================================================
- * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
- * ================================================================================
- * 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.
- * ============LICENSE_END=========================================================
- */
-
-package org.openecomp.core.converter.api;
-
-import org.openecomp.core.utilities.file.FileContentHandler;
-import org.openecomp.sdc.tosca.datatypes.ToscaServiceModel;
-
-public interface ToscaConverterManager {
-
-  ToscaServiceModel convert(String csarName, FileContentHandler fileContentHandler);
-}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/exception/QueryOperationNotSupportedException.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/exception/QueryOperationNotSupportedException.java
new file mode 100644
index 0000000000..a3f4b83812
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/exception/QueryOperationNotSupportedException.java
@@ -0,0 +1,28 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.exception;
+
+public class QueryOperationNotSupportedException extends RuntimeException {
+
+    public QueryOperationNotSupportedException(final String s) {
+        super(s);
+    }
+
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionDefinition.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionDefinition.java
new file mode 100644
index 0000000000..040639358f
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionDefinition.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.openecomp.core.converter.pnfd.strategy.PnfdConversionStrategy;
+
+@Getter
+@AllArgsConstructor
+public class ConversionDefinition {
+
+    private ConversionQuery conversionQuery;
+    private String toAttributeName;
+    private PnfdConversionStrategy pnfdConversionStrategy;
+    private String toGetInput;
+
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionQuery.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionQuery.java
new file mode 100644
index 0000000000..fc1ef75f05
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionQuery.java
@@ -0,0 +1,47 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import java.util.Map;
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+
+/**
+ * Stores a YAML query. The query is a YAML Object that should have the same structure or part of the original YAML that
+ * is desired to find in a TOSCA Yaml block.
+ */
+@Getter
+@EqualsAndHashCode
+@AllArgsConstructor
+public class ConversionQuery {
+
+    private final Object query;
+
+    /**
+     * Checks if the query is a valid attribute query.
+     *
+     * @return {@code true} when its valid, {@code false} otherwise.
+     */
+    public boolean isValidAttributeQuery() {
+        //only a map structure is supported
+        return query instanceof Map;
+    }
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionStrategyType.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionStrategyType.java
new file mode 100644
index 0000000000..b5c1f7c411
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/ConversionStrategyType.java
@@ -0,0 +1,57 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import java.util.Optional;
+
+/**
+ * Represents a type of a conversion strategy
+ */
+public enum ConversionStrategyType {
+    COPY("copy"),
+    REPLACE("replace"),
+    REPLACE_IN_LIST("replaceInList");
+
+    private final String type;
+
+    ConversionStrategyType(final String type) {
+        this.type = type;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    /**
+     * Parse a String to the related {@link ConversionStrategyType}.
+     * @param type  the {@link ConversionStrategyType} type
+     * @return
+     *  The {@link ConversionStrategyType} representing the given type.
+     */
+    public static Optional<ConversionStrategyType> parse(final String type) {
+        for (final ConversionStrategyType conversionStrategyType : values()) {
+            if (conversionStrategyType.getType().equals(type)) {
+                return Optional.of(conversionStrategyType);
+            }
+        }
+
+        return Optional.empty();
+    }
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/PnfTransformationToken.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/PnfTransformationToken.java
new file mode 100644
index 0000000000..fab5b44720
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/PnfTransformationToken.java
@@ -0,0 +1,48 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+/**
+ * Represents a token from the transformation descriptor
+ */
+public enum PnfTransformationToken {
+    CONVERSIONS("conversions"),
+    FROM("from"),
+    LIST("list"),
+    QUERY("query"),
+    TO("to"),
+    STRATEGY("strategy"),
+    TO_NAME("to-name"),
+    TO_VALUE("to-value"),
+    TRANSFORMATION_FOR("transformation-for"),
+    NAME("name"),
+    DESCRIPTION("description"),
+    GET_INPUT("get_input"), TO_GET_INPUT("to-get-input");
+
+    private final String name;
+
+    PnfTransformationToken(final String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/Transformation.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/Transformation.java
new file mode 100644
index 0000000000..fa4a9336e3
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/Transformation.java
@@ -0,0 +1,73 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import java.util.List;
+import java.util.Objects;
+import lombok.Getter;
+import lombok.Setter;
+import org.apache.commons.collections.CollectionUtils;
+
+/**
+ * Represents a transformation from the PNFD transformation descriptor.
+ */
+@Getter
+@Setter
+public class Transformation {
+
+    private String name;
+    private String description;
+    private TransformationBlock block;
+    private ConversionQuery conversionQuery;
+    private List<ConversionDefinition> conversionDefinitionList;
+
+    /**
+     * Checks if the instance contains all necessary information to be used.
+     *
+     * @return {code true} if the instance is valid, {code false} otherwise
+     */
+    public boolean isValid() {
+        return block != null && conversionQuery != null && !CollectionUtils.isEmpty(conversionDefinitionList);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Transformation that = (Transformation) o;
+        //if there is no query, compares by block and name.
+        if (conversionQuery != null && conversionQuery.getQuery() == null && that.conversionQuery.getQuery() == null) {
+            return block == that.block &&
+                Objects.equals(name, that.name);
+        }
+        //transformations with the same block and query will override themselves.
+        return block == that.block &&
+            Objects.equals(conversionQuery, that.conversionQuery);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(block, conversionQuery);
+    }
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationBlock.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationBlock.java
new file mode 100644
index 0000000000..4c897c45fb
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationBlock.java
@@ -0,0 +1,57 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import java.util.Optional;
+
+/**
+ * Represents a type of a transformation block
+ */
+public enum TransformationBlock {
+    INPUT("input"),
+    NODE_TEMPLATE("nodeTemplate"),
+    GET_INPUT_FUNCTION("getInputFunction");
+
+    private final String name;
+
+    TransformationBlock(final String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Parse a String to the related {@link TransformationBlock}.
+     * @param name  the {@link TransformationBlock} name
+     * @return
+     *  The {@link TransformationBlock} representing the given name.
+     */
+    public static Optional<TransformationBlock> parse(final String name) {
+        for (final TransformationBlock transformationBlock : values()) {
+            if (transformationBlock.getName().equals(name)) {
+                return Optional.of(transformationBlock);
+            }
+        }
+
+        return Optional.empty();
+    }
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationDescription.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationDescription.java
new file mode 100644
index 0000000000..f21a719f8d
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/model/TransformationDescription.java
@@ -0,0 +1,32 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.model;
+
+import java.util.Set;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class TransformationDescription {
+
+    private final Set<Transformation> transformationSet;
+
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/AbstractPnfdBlockParser.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/AbstractPnfdBlockParser.java
new file mode 100644
index 0000000000..fe8bd428c3
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/AbstractPnfdBlockParser.java
@@ -0,0 +1,178 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.parser;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import org.apache.commons.collections.MapUtils;
+import org.onap.sdc.tosca.datatypes.model.ServiceTemplate;
+import org.openecomp.core.converter.ServiceTemplateReaderService;
+import org.openecomp.core.converter.pnfd.model.ConversionDefinition;
+import org.openecomp.core.converter.pnfd.model.PnfTransformationToken;
+import org.openecomp.core.converter.pnfd.model.Transformation;
+
+public abstract class AbstractPnfdBlockParser implements PnfdBlockParser {
+
+    protected final Transformation transformation;
+    protected ServiceTemplateReaderService templateFrom;
+    protected ServiceTemplate templateTo;
+
+    public AbstractPnfdBlockParser(final Transformation transformation) {
+        this.transformation = transformation;
+    }
+
+    /**
+     * Parses a PNFD block based on the {@link Transformation} provided during the {@link PnfdBlockParser}
+     * instantiation.
+     *
+     * @param templateFrom the original PNFD template
+     * @param templateTo the resulting PNFD template
+     */
+    public void parse(final ServiceTemplateReaderService templateFrom, final ServiceTemplate templateTo) {
+        this.templateFrom = templateFrom;
+        this.templateTo = templateTo;
+        final Set<Map<String, Object>> blockToParseSet = findBlocksToParse();
+        if (!blockToParseSet.isEmpty()) {
+            blockToParseSet.forEach(this::parse);
+        }
+    }
+
+    /**
+     * Applies all specified conversions in {@link Transformation#getConversionDefinitionList()} for the given
+     * blockYamlObject.
+     *
+     * @param blockYamlObject the block content as a YAML object
+     */
+    protected void parse(final Map<String, Object> blockYamlObject) {
+        if (MapUtils.isEmpty(blockYamlObject)) {
+            return;
+        }
+        final List<ConversionDefinition> conversionDefinitionList = transformation.getConversionDefinitionList();
+        final Map<String, Object> parsedBlockYamlObject = new HashMap<>();
+        final String blockName = blockYamlObject.keySet().iterator().next();
+        conversionDefinitionList.stream()
+            .filter(conversionDefinition -> conversionDefinition.getConversionQuery().isValidAttributeQuery())
+            .forEach(conversionDefinition -> {
+                final Map<String, Object> query =
+                    (Map<String, Object>) conversionDefinition.getConversionQuery().getQuery();
+                final Map<String, Object> blockAttributeMap = (Map<String, Object>) blockYamlObject.get(blockName);
+                final Optional<Map<String, Object>> parsedBlockAttributeMap = buildParsedBlock(query, blockAttributeMap
+                    , conversionDefinition);
+                parsedBlockAttributeMap.ifPresent(convertedNodeTemplateAttributeMap1 ->
+                    mergeYamlObjects(parsedBlockYamlObject, convertedNodeTemplateAttributeMap1)
+                );
+            });
+
+        write(blockName, parsedBlockYamlObject);
+    }
+
+    /**
+     * Writes the block in the resulting {@link ServiceTemplate} {@link #templateTo}.
+     *
+     * @param blockName the name of the block
+     * @param parsedBlockYamlObject the block content as a YAML object
+     */
+    protected abstract void write(final String blockName, final Map<String, Object> parsedBlockYamlObject);
+
+    /**
+     * Uses the provided attribute query to find a attribute in the original YAML object and apply the provided
+     * conversion.
+     *
+     * @param attributeQuery the attribute query
+     * @param fromNodeTemplateAttributeMap the original YAML object
+     * @param conversionDefinition the conversion
+     * @return the rebuilt original YAML object with the converted attribute
+     */
+    protected abstract Optional<Map<String, Object>> buildParsedBlock(final Map<String, Object> attributeQuery,
+        final Map<String, Object> fromNodeTemplateAttributeMap,
+        final ConversionDefinition conversionDefinition);
+
+    /**
+     * Merges two YAML objects.
+     *
+     * @param originalMap original YAML object
+     * @param toBeMergedMap YAML object to be merged
+     * @return the new YAML object representing the merge result.
+     */
+    protected Map<String, Object> mergeYamlObjects(final Map<String, Object> originalMap,
+        final Map<String, Object> toBeMergedMap) {
+        toBeMergedMap.forEach(
+            (key, value) -> originalMap.merge(key, value,
+                (toBeMergedValue, originalValue) -> {
+                    if (originalValue instanceof Map) {
+                        return mergeYamlObjects((Map) originalValue, (Map) toBeMergedValue);
+                    }
+                    return originalValue;
+                })
+        );
+
+        return originalMap;
+    }
+
+    /**
+     * Executes the provided {@link #transformation getConversionQuery} YAML query to find the blocks to be parsed in
+     * {@link #templateFrom}.
+     *
+     * @return The YAML blocks found
+     */
+    protected abstract Set<Map<String, Object>> findBlocksToParse();
+
+    /**
+     * Checks if the YAML object is a TOSCA get_input call
+     *
+     * @param yamlObject the YAML object
+     * @return {@code true} if the YAML object is a TOSCA get_input call, {@code false} otherwise
+     */
+    protected boolean isGetInputFunction(final Object yamlObject) {
+        if (yamlObject instanceof Map) {
+            final Map<String, Object> yamlMap = (Map<String, Object>) yamlObject;
+            return yamlMap.containsKey(PnfTransformationToken.GET_INPUT.getName());
+        }
+
+        return false;
+    }
+
+    /**
+     * Gets the value (input name) of a YAML object representing a TOSCA get_input call: "get_input: <i>value</i>".
+     *
+     * @param yamlObject the YAML object
+     * @return The get_input function value, that represents the input name
+     */
+    protected String extractGetInputFunctionValue(final Object yamlObject) {
+        if (yamlObject instanceof Map) {
+            final Map<String, Object> yamlMap = (Map<String, Object>) yamlObject;
+            return (String) yamlMap.values().stream().findFirst().orElse(null);
+        }
+
+        return null;
+    }
+
+    /**
+     * Gets the stored input names called with TOSCA get_input function and its transformation configured in {@link
+     * ConversionDefinition#getToGetInput()}
+     */
+    public Optional<Map<String, String>> getInputAndTransformationNameMap() {
+        return Optional.empty();
+    }
+
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/PnfdBlockParser.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/PnfdBlockParser.java
new file mode 100644
index 0000000000..dd66f502ea
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/parser/PnfdBlockParser.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.parser;
+
+import java.util.Map;
+import java.util.Optional;
+import org.onap.sdc.tosca.datatypes.model.ServiceTemplate;
+import org.openecomp.core.converter.ServiceTemplateReaderService;
+
+/**
+ * Represents a parser of a TOSCA block.
+ */
+public interface PnfdBlockParser {
+
+    void parse(final ServiceTemplateReaderService templateFrom, final ServiceTemplate templateTo);
+
+    Optional<Map<String, String>> getInputAndTransformationNameMap();
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/AbstractPnfdConversionStrategy.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/AbstractPnfdConversionStrategy.java
new file mode 100644
index 0000000000..ffd2e6fb34
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/AbstractPnfdConversionStrategy.java
@@ -0,0 +1,39 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.strategy;
+
+import java.util.Map;
+import org.openecomp.core.converter.pnfd.model.ConversionStrategyType;
+
+public abstract class AbstractPnfdConversionStrategy<T, U> implements PnfdConversionStrategy<T, U> {
+
+    protected final ConversionStrategyType strategyType;
+    protected final Map<T, U> conversionMap;
+
+    public AbstractPnfdConversionStrategy(final ConversionStrategyType strategyType, final Map<T, U> conversionMap) {
+        this.strategyType = strategyType;
+        this.conversionMap = conversionMap;
+    }
+
+    public ConversionStrategyType getStrategyType() {
+        return strategyType;
+    }
+
+}
diff --git a/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/PnfdConversionStrategy.java b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/PnfdConversionStrategy.java
new file mode 100644
index 0000000000..724f20550f
--- /dev/null
+++ b/openecomp-be/lib/openecomp-tosca-converter-lib/openecomp-tosca-converter-api/src/main/java/org/openecomp/core/converter/pnfd/strategy/PnfdConversionStrategy.java
@@ -0,0 +1,30 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.core.converter.pnfd.strategy;
+
+import java.util.Optional;
+import org.openecomp.core.converter.pnfd.model.ConversionStrategyType;
+
+public interface PnfdConversionStrategy<T, U> {
+
+    Optional<U> convert(final T originalValue);
+
+    ConversionStrategyType getStrategyType();
+}