Fix sonar bugs in distribution

Change-Id: I42e568cab649da74e2a179fe487c32feec9c88fa
Issue-ID: POLICY-1035
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

3 files changed, 147 insertions, 127 deletions

diff --git a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/ExtractFromNode.java b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/ExtractFromNode.java
index 7c839a28..d60aa113 100644
--- a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/ExtractFromNode.java
+++ b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/ExtractFromNode.java
@@ -20,15 +20,17 @@
 
 package org.onap.policy.distribution.reception.decoding.pdpx;
 
+import com.google.common.collect.ImmutableMap;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.HashMap;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.gson.reflect.TypeToken;
 
 import org.onap.policy.common.logging.flexlogger.FlexLogger;
 import org.onap.policy.common.logging.flexlogger.Logger;
@@ -38,7 +40,6 @@ import org.onap.sdc.toscaparser.api.CapabilityAssignment;
 import org.onap.sdc.toscaparser.api.CapabilityAssignments;
 import org.onap.sdc.toscaparser.api.NodeTemplate;
 import org.onap.sdc.toscaparser.api.RequirementAssignment;
-import org.onap.sdc.toscaparser.api.elements.Metadata;
 
 /**
  * Extract concerned info from NodeTemplate, currently ONLY HPA Feature.
@@ -47,6 +48,7 @@ import org.onap.sdc.toscaparser.api.elements.Metadata;
  */
 public class ExtractFromNode {
 
+    private static final String CONFIGURATION_VALUE = "configuration-value";
     private static final Logger LOGGER = FlexLogger.getLogger(ExtractFromNode.class);
     private static final String VDU_TYPE = "tosca.nodes.nfv.Vdu.Compute";
     private static final String VDU_CP_TYPE = "tosca.nodes.nfv.VduCp";
@@ -54,18 +56,15 @@ public class ExtractFromNode {
     private static final String NUM_VIRTUAL_CPU_PATH = "virtual_cpu#num_virtual_cpu";
     private static final String CPU_ARCHITECTURE_PATH = "virtual_cpu#cpu_architecture";
     private static final String MEMORY_PAGE_SIZE_PATH = "virtual_memory#vdu_memory_requirements#memoryPageSize";
-    private static final String NETWORK_INTERFACE_TYPE_PATH = 
-        "virtual_network_interface_requirements#network_interface_requirements#interfaceType";
-    private static final String NETWORK_PCI_PATH = 
-        "virtual_network_interface_requirements#nic_io_requirements";
+    private static final String NETWORK_INTERFACE_TYPE_PATH =
+            "virtual_network_interface_requirements#network_interface_requirements#interfaceType";
+    private static final String NETWORK_PCI_PATH = "virtual_network_interface_requirements#nic_io_requirements";
     private static final String BASIC_CAPABILITIES_HPA_FEATURE = "BasicCapabilities";
     private static final String HUGE_PAGES_HPA_FEATURE = "hugePages";
-    private static final Map<String, String> NETWORK_HPA_FEATURE_MAP = new HashMap() {{
-        put("SR-IOV", "SriovNICNetwork");
-        put("PCI-Passthrough", "pciePassthrough");
-    }};
+    private static final Map<String, String> NETWORK_HPA_FEATURE_MAP =
+            ImmutableMap.of("SR-IOV", "SriovNICNetwork", "PCI-Passthrough", "pciePassthrough");
 
-    ISdcCsarHelper sdcCsarHelper;
+    private ISdcCsarHelper sdcCsarHelper;
     final Gson gson = new GsonBuilder().serializeNulls().setPrettyPrinting().disableHtmlEscaping().create();
 
     public void setSdcCsarHelper(final ISdcCsarHelper sdcCsarHelper) {
@@ -73,13 +72,13 @@ public class ExtractFromNode {
     }
 
     /**
-     * ExtractInfo from VNF , each VNF may includes more than one VDUs and CPs return new generated
-     * PdpxPolicy if it has got Hpa feature info or else return null.
+     * ExtractInfo from VNF , each VNF may includes more than one VDUs and CPs return new generated PdpxPolicy if it has
+     * got Hpa feature info or else return null.
      *
      * @param node the NodeTemplate
-     * 
+     *
      * @return the extracted info from input node
-     * 
+     *
      * @throws PolicyDecodingException if extract fails
      */
     public Content extractInfo(final NodeTemplate node) throws PolicyDecodingException {
@@ -95,7 +94,7 @@ public class ExtractFromNode {
         for (final NodeTemplate nodeChild : lnodeChild) {
             final String type = sdcCsarHelper.getTypeOfNodeTemplate(nodeChild);
             LOGGER.debug("the type of this nodeChild = " + type);
-            LOGGER.debug("the meta data of this nodetemplate = " + sdcCsarHelper.getNodeTemplateMetadata(nodeChild));
+            LOGGER.debug("the meta data of this nodeChild = " + sdcCsarHelper.getNodeTemplateMetadata(nodeChild));
             if (type.equalsIgnoreCase(VDU_TYPE)) {
                 lnodeVdu.add(nodeChild);
             } else if (type.equalsIgnoreCase(VDU_CP_TYPE)) {
@@ -111,17 +110,15 @@ public class ExtractFromNode {
         if (content.getFlavorFeatures().isEmpty()) {
             return null;
         }
-
         return content;
     }
 
 
     /**
-     * ExtractInfofromVdu, supported hpa features, All under the capability of
-     * tosca.nodes.nfv.Vdu.Compute.
+     * ExtractInfofromVdu, supported hpa features, All under the capability of tosca.nodes.nfv.Vdu.Compute.
      *
      * @param lnodeVdu the list of Vdu node
-     * 
+     *
      * @param content to be change based on lnodeVdu
      */
     public void extractInfoVdu(final List<NodeTemplate> lnodeVdu, final Content content) {
@@ -142,42 +139,43 @@ public class ExtractFromNode {
                     capabilityAssignments.getCapabilityByName("virtual_compute");
             if (capabilityAssignment != null) {
                 generateBasicCapability(capabilityAssignment, flavorFeature);
-                generateHugePages(capabilityAssignment,flavorFeature);
+                generateHugePages(capabilityAssignment, flavorFeature);
             }
             content.getFlavorFeatures().add(flavorFeature);
         }
     }
 
     /**
-     * GenerateBasicCapability, supported hpa features, All under the capability of
-     * tosca.nodes.nfv.Vdu.Compute.
+     * GenerateBasicCapability, supported hpa features, All under the capability of tosca.nodes.nfv.Vdu.Compute.
      *
      * @param capabilityAssignment represents the capability of node
-     * 
+     *
      * @param flavorFeature represents all the features of specified flavor
      */
-    private void generateBasicCapability(final CapabilityAssignment capabilityAssignment, FlavorFeature flavorFeature){
-        //the format is xxx MB/GB like 4096 MB
-        String virtualMemSize = sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment,
-                VIRTUAL_MEM_SIZE_PATH);
+    private void generateBasicCapability(final CapabilityAssignment capabilityAssignment,
+            final FlavorFeature flavorFeature) {
+        // the format is xxx MB/GB like 4096 MB
+        final String virtualMemSize =
+                sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment, VIRTUAL_MEM_SIZE_PATH);
         if (virtualMemSize != null) {
             LOGGER.debug("the virtualMemSize = " + virtualMemSize);
-            HpaFeatureAttribute hpaFeatureAttribute = generateHpaFeatureAttribute("virtualMemSize", virtualMemSize);
-            FlavorProperty flavorProperty = new FlavorProperty();
+            final HpaFeatureAttribute hpaFeatureAttribute =
+                    generateHpaFeatureAttribute("virtualMemSize", virtualMemSize);
+            final FlavorProperty flavorProperty = new FlavorProperty();
             flavorProperty.setHpaFeature(BASIC_CAPABILITIES_HPA_FEATURE);
             flavorProperty.getHpaFeatureAttributes().add(hpaFeatureAttribute);
             flavorFeature.getFlavorProperties().add(flavorProperty);
         }
-            
-        //the format is int like 2 
-        String numVirtualCpu = sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment,
-            NUM_VIRTUAL_CPU_PATH);
+
+        // the format is int like 2
+        final String numVirtualCpu =
+                sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment, NUM_VIRTUAL_CPU_PATH);
         if (numVirtualCpu != null) {
             LOGGER.debug("the numVirtualCpu = " + numVirtualCpu);
-            HpaFeatureAttribute hpaFeatureAttribute = generateHpaFeatureAttribute("numVirtualCpu", numVirtualCpu);
-            String cpuArchitecture = sdcCsarHelper.getCapabilityPropertyLeafValue
-                    (capabilityAssignment,CPU_ARCHITECTURE_PATH);
-            FlavorProperty flavorProperty = new FlavorProperty();
+            final HpaFeatureAttribute hpaFeatureAttribute = generateHpaFeatureAttribute("numVirtualCpu", numVirtualCpu);
+            final String cpuArchitecture =
+                    sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment, CPU_ARCHITECTURE_PATH);
+            final FlavorProperty flavorProperty = new FlavorProperty();
             flavorProperty.setHpaFeature(BASIC_CAPABILITIES_HPA_FEATURE);
             if (cpuArchitecture != null) {
                 flavorProperty.setArchitecture(cpuArchitecture);
@@ -188,17 +186,16 @@ public class ExtractFromNode {
     }
 
     /**
-     * GenerateHpaFeatureAttribute based on the value of featureValue. the format:
-     * "hpa-attribute-key": "pciVendorId", "hpa-attribute-value": "1234", "operator": "=", "unit":
-     * "xxx".
+     * GenerateHpaFeatureAttribute based on the value of featureValue. the format: "hpa-attribute-key": "pciVendorId",
+     * "hpa-attribute-value": "1234", "operator": "=", "unit": "xxx".
      *
      * @param hpaAttributeKey get from the high layer tosca DM
-     * 
+     *
      * @param featureValue get from the high layer tosca DM
-     * 
+     *
      */
     private HpaFeatureAttribute generateHpaFeatureAttribute(final String hpaAttributeKey, final String featureValue) {
-        //based on input featureValue, return back a suitable hpaFeatureAttribute
+        // based on input featureValue, return back a suitable hpaFeatureAttribute
         final HpaFeatureAttribute hpaFeatureAttribute = new HpaFeatureAttribute();
         hpaFeatureAttribute.setHpaAttributeKey(hpaAttributeKey);
         final String tmp = featureValue.replace(" ", "");
@@ -217,28 +214,27 @@ public class ExtractFromNode {
     }
 
     /**
-     * GenerateHugePages, supported hpa features, All under the capability of
-     * tosca.nodes.nfv.Vdu.Compute. The format is a map like: {"schema-version": "0",
-     * "schema-location": "", "platform-id": "generic", "mandatory": true, "configuration-value": "2
-     * MB"}
+     * GenerateHugePages, supported hpa features, All under the capability of tosca.nodes.nfv.Vdu.Compute. The format is
+     * a map like: {"schema-version": "0", "schema-location": "", "platform-id": "generic", "mandatory": true,
+     * "configuration-value": "2 MB"}
      *
      * @param capabilityAssignment represents the capability of node
-     * 
+     *
      * @param flavorFeature represents all the features of specified flavor
      */
-    private void generateHugePages(final CapabilityAssignment capabilityAssignment, FlavorFeature flavorFeature){
-        String memoryPageSize = sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment,
-            MEMORY_PAGE_SIZE_PATH);
+    private void generateHugePages(final CapabilityAssignment capabilityAssignment, final FlavorFeature flavorFeature) {
+        final String memoryPageSize =
+                sdcCsarHelper.getCapabilityPropertyLeafValue(capabilityAssignment, MEMORY_PAGE_SIZE_PATH);
         LOGGER.debug("the memoryPageSize = " + memoryPageSize);
         if (memoryPageSize != null) {
-            Map<String, Object> retMap = gson.fromJson(memoryPageSize, 
-                new TypeToken<HashMap<String, Object>>() {}.getType());
+            final Map<String, Object> retMap =
+                    gson.fromJson(memoryPageSize, new TypeToken<HashMap<String, Object>>() {}.getType());
             LOGGER.debug("the retMap = " + retMap);
-            String memoryPageSizeValue = retMap.get("configuration-value").toString();
-            String mandatory = retMap.get("mandatory").toString();
-            HpaFeatureAttribute hpaFeatureAttribute = 
-                generateHpaFeatureAttribute("memoryPageSize",memoryPageSizeValue);
-            FlavorProperty flavorProperty = new FlavorProperty();
+            final String memoryPageSizeValue = retMap.get(CONFIGURATION_VALUE).toString();
+            final String mandatory = retMap.get("mandatory").toString();
+            final HpaFeatureAttribute hpaFeatureAttribute =
+                    generateHpaFeatureAttribute("memoryPageSize", memoryPageSizeValue);
+            final FlavorProperty flavorProperty = new FlavorProperty();
             flavorProperty.setHpaFeature(HUGE_PAGES_HPA_FEATURE);
             if (mandatory != null) {
                 flavorProperty.setMandatory(mandatory);
@@ -253,78 +249,82 @@ public class ExtractFromNode {
      * tosca.nodes.nfv.VduCp.
      *
      * @param lnodeVduCp the list of VduCp node
-     * 
+     *
      * @param content to be change based on lnodeVduCp
      * @throws PolicyDecodingException if extract CP fails
      */
-    public void extractInfoVduCp(final List<NodeTemplate> lnodeVduCp, Content content) throws PolicyDecodingException {
+    public void extractInfoVduCp(final List<NodeTemplate> lnodeVduCp, final Content content)
+            throws PolicyDecodingException {
         // each CP will binds to a VDU so need the vdu flavor map info.
-        Map<String, FlavorFeature> vduFlavorMap = new HashMap<>();
-        for ( FlavorFeature flavorFeature: content.getFlavorFeatures()) {
+        final Map<String, FlavorFeature> vduFlavorMap = new HashMap<>();
+        for (final FlavorFeature flavorFeature : content.getFlavorFeatures()) {
             LOGGER.debug("the id = " + flavorFeature.getId());
-            vduFlavorMap.put(flavorFeature.getId(),flavorFeature);
+            vduFlavorMap.put(flavorFeature.getId(), flavorFeature);
         }
-        for ( NodeTemplate node : lnodeVduCp) {
-            String interfaceType = sdcCsarHelper.getNodeTemplatePropertyLeafValue(node,NETWORK_INTERFACE_TYPE_PATH);
-            LOGGER.debug("the interfaceType = " + interfaceType);     
+        for (final NodeTemplate node : lnodeVduCp) {
+            final String interfaceType =
+                    sdcCsarHelper.getNodeTemplatePropertyLeafValue(node, NETWORK_INTERFACE_TYPE_PATH);
+            LOGGER.debug("the interfaceType = " + interfaceType);
             Map<String, Object> retMap = new HashMap<>();
             if (interfaceType != null) {
                 retMap = gson.fromJson(interfaceType, new TypeToken<HashMap<String, Object>>() {}.getType());
                 LOGGER.debug("the retMap = " + retMap);
             }
 
-            String networkHpaFeature; 
-            if ( retMap.containsKey("configuration-value")) {
-                String interfaceTypeValue = retMap.get("configuration-value").toString();
+            String networkHpaFeature;
+            if (retMap.containsKey(CONFIGURATION_VALUE)) {
+                final String interfaceTypeValue = retMap.get(CONFIGURATION_VALUE).toString();
                 LOGGER.debug(" the interfacetype value is =" + interfaceTypeValue);
-                if ( NETWORK_HPA_FEATURE_MAP.containsKey(interfaceTypeValue)) {
+                if (NETWORK_HPA_FEATURE_MAP.containsKey(interfaceTypeValue)) {
                     networkHpaFeature = NETWORK_HPA_FEATURE_MAP.get(interfaceTypeValue);
                     LOGGER.debug(" the networkHpaFeature is =" + networkHpaFeature);
                 } else {
                     LOGGER.debug(" unspported network interface ");
                     return;
                 }
-            }else{
+            } else {
                 LOGGER.debug(" no configuration-value defined in interfaceType");
                 return;
             }
-            
-            for (RequirementAssignment requriement: sdcCsarHelper.getRequirementsOf(node).getAll()) {
-                String nodeTemplateName = requriement.getNodeTemplateName().toLowerCase();
+
+            for (final RequirementAssignment requriement : sdcCsarHelper.getRequirementsOf(node).getAll()) {
+                final String nodeTemplateName = requriement.getNodeTemplateName().toLowerCase();
                 LOGGER.debug("getNodeTemplateName =" + nodeTemplateName);
-                if ( nodeTemplateName == null) {
-                        continue; 
-                } 
+                if (nodeTemplateName == null) {
+                    continue;
+                }
                 if (!vduFlavorMap.containsKey(nodeTemplateName)) {
                     throw new PolicyDecodingException("vdu Flavor Map should contains the key " + nodeTemplateName);
                 }
                 generateNetworkFeature(networkHpaFeature, node, vduFlavorMap.get(nodeTemplateName));
             }
         }
-    }   
+    }
 
-    /*
-     * GenerateNetworkFeature, all pci feature are grouped into FlavorFeature together.
+    /**
+     * GenerateNetworkFeature, all pci feature are grouped into FlavorFeature together. The format is a map like:
+     * {"schema-version": "0", "schema-location": "", "platform-id": "generic", "mandatory": true,
+     * "configuration-value": "2 MB"}
      *
      * @param networkHpaFeature represents the specified Hpa feature
      * @param node represents the CP Node
      * @param flavorFeature represents all the features of specified flavor
      */
-    private void generateNetworkFeature(final String networkHpaFeature, final NodeTemplate node, FlavorFeature flavorFeature) {
-        //the format is a map like: {"schema-version": "0", "schema-location": "", "platform-id": "generic", 
-        // "mandatory": true, "configuration-value": "2 MB"}
-        FlavorProperty flavorProperty = new FlavorProperty();
+    private void generateNetworkFeature(final String networkHpaFeature, final NodeTemplate node,
+            final FlavorFeature flavorFeature) {
+        final FlavorProperty flavorProperty = new FlavorProperty();
         flavorProperty.setHpaFeature(networkHpaFeature);
-        String[] pciKeys = { "pciVendorId", "pciDeviceId", "pciNumDevices", "physicalNetwork"};
-        for (String pciKey: pciKeys) {
+        final String[] pciKeys = { "pciVendorId", "pciDeviceId", "pciNumDevices", "physicalNetwork" };
+        for (final String pciKey : pciKeys) {
             LOGGER.debug("the pciKey = " + pciKey);
-            String pciKeyPath = NETWORK_PCI_PATH + "#" + pciKey;
-            String pciValue = sdcCsarHelper.getNodeTemplatePropertyLeafValue(node,pciKeyPath);
+            final String pciKeyPath = NETWORK_PCI_PATH + "#" + pciKey;
+            final String pciValue = sdcCsarHelper.getNodeTemplatePropertyLeafValue(node, pciKeyPath);
             if (pciValue != null) {
                 LOGGER.debug("the pciValue = " + pciValue);
-                Map<String, Object> retMap = gson.fromJson(pciValue, new TypeToken<HashMap<String, Object>>() {}.getType());
-                String pciConfigValue = retMap.get("configuration-value").toString();
-                HpaFeatureAttribute hpaFeatureAttribute = generateHpaFeatureAttribute(pciKey,pciConfigValue);
+                final Map<String, Object> retMap =
+                        gson.fromJson(pciValue, new TypeToken<HashMap<String, Object>>() {}.getType());
+                final String pciConfigValue = retMap.get(CONFIGURATION_VALUE).toString();
+                final HpaFeatureAttribute hpaFeatureAttribute = generateHpaFeatureAttribute(pciKey, pciConfigValue);
                 flavorProperty.getHpaFeatureAttributes().add(hpaFeatureAttribute);
             }
         }
diff --git a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/PolicyDecoderCsarPdpxConfigurationParameterBuilder.java b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/PolicyDecoderCsarPdpxConfigurationParameterBuilder.java
index 199d582b..4c781030 100644
--- a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/PolicyDecoderCsarPdpxConfigurationParameterBuilder.java
+++ b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/pdpx/PolicyDecoderCsarPdpxConfigurationParameterBuilder.java
@@ -32,31 +32,55 @@ public class PolicyDecoderCsarPdpxConfigurationParameterBuilder {
     private String riskType;
     private String riskLevel;
 
+    public String getPolicyNamePrefix() {
+        return policyNamePrefix;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setPolicyNamePrefix(final String policyNamePrefix) {
         this.policyNamePrefix = policyNamePrefix;
         return this;
     }
 
+    public String getOnapName() {
+        return onapName;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setOnapName(final String onapName) {
         this.onapName = onapName;
         return this;
     }
 
+    public String getVersion() {
+        return version;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setVersion(final String version) {
         this.version = version;
         return this;
     }
 
+    public String getPriority() {
+        return priority;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setPriority(final String priority) {
         this.priority = priority;
         return this;
     }
 
+    public String getRiskType() {
+        return riskType;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setRiskType(final String riskType) {
         this.riskType = riskType;
         return this;
     }
 
+    public String getRiskLevel() {
+        return riskLevel;
+    }
+
     public PolicyDecoderCsarPdpxConfigurationParameterBuilder setRiskLevel(final String riskLevel) {
         this.riskLevel = riskLevel;
         return this;
@@ -65,31 +89,6 @@ public class PolicyDecoderCsarPdpxConfigurationParameterBuilder {
     public PolicyDecoderCsarPdpxConfigurationParameterGroup build() {
         return new PolicyDecoderCsarPdpxConfigurationParameterGroup(this);
     }
-
-    public String getPolicyNamePrefix() {
-        return policyNamePrefix;
-    }
-
-    public String getOnapName() {
-        return onapName;
-    }
-
-    public String getVersion() {
-        return version;
-    }
-
-    public String getPriority() {
-        return priority;
-    }
-
-    public String getRiskType() {
-        return riskType;
-    }
-
-    public String getRiskLevel() {
-        return riskLevel;
-    }
-
 }
 
 
diff --git a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/policy/file/PolicyDecoderFileInCsarToPolicy.java b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/policy/file/PolicyDecoderFileInCsarToPolicy.java
index 9516ad70..80c5172f 100644
--- a/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/policy/file/PolicyDecoderFileInCsarToPolicy.java
+++ b/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/decoding/policy/file/PolicyDecoderFileInCsarToPolicy.java
@@ -70,16 +70,14 @@ public class PolicyDecoderFileInCsarToPolicy implements PolicyDecoder<Csar, Poli
     @Override
     public Collection<PolicyAsString> decode(final Csar csar) throws PolicyDecodingException {
         final Collection<PolicyAsString> policyList = new ArrayList<>();
-
-        try (ZipFile zipFile = new ZipFile(csar.getCsarPath())) {
+        ZipFile zipFile = null;
+        try {
+            zipFile = new ZipFile(csar.getCsarPath());
             final Enumeration<? extends ZipEntry> entries = zipFile.entries();
             while (entries.hasMoreElements()) {
                 final ZipEntry entry = entries.nextElement();
                 if (entry.getName().contains(decoderParameters.getPolicyFileName())) {
-                    final StringWriter writer = new StringWriter();
-                    IOUtils.copy(zipFile.getInputStream(entry), writer, "UTF-8");
-                    final PolicyAsString poilcy = new PolicyAsString(decoderParameters.getPolicyFileName(),
-                            decoderParameters.getPolicyType(), writer.toString());
+                    final PolicyAsString poilcy = createPolicy(zipFile, entry);
                     policyList.add(poilcy);
                 }
             }
@@ -87,8 +85,31 @@ public class PolicyDecoderFileInCsarToPolicy implements PolicyDecoder<Csar, Poli
             final String message = "Failed decoding the policy";
             LOGGER.error(message, exp);
             throw new PolicyDecodingException(message, exp);
+        } finally {
+            if (zipFile != null) {
+                try {
+                    zipFile.close();
+                } catch (final IOException exp) {
+                    LOGGER.error("Failed closing the zipFile", exp);
+                }
+            }
         }
-
         return policyList;
     }
+
+    /**
+     * Creates the policy from given input.
+     *
+     * @param zipFile the csar file
+     * @param entry an entry in the csar file
+     * @return the created policy
+     * @throws IOException if policy creation fails
+     */
+    private PolicyAsString createPolicy(final ZipFile zipFile, final ZipEntry entry) throws IOException {
+        final StringWriter writer = new StringWriter();
+        IOUtils.copy(zipFile.getInputStream(entry), writer, "UTF-8");
+        final PolicyAsString poilcy = new PolicyAsString(decoderParameters.getPolicyFileName(),
+                decoderParameters.getPolicyType(), writer.toString());
+        return poilcy;
+    }
 }