1 files changed, 104 insertions, 0 deletions
diff --git a/qpid/java/maven/qpid-enforcer-plugin-rules/src/main/java/org/apache/qpid/maven/enforcer/rule/RequireFileContentsAreEquivalent.java b/qpid/java/maven/qpid-enforcer-plugin-rules/src/main/java/org/apache/qpid/maven/enforcer/rule/RequireFileContentsAreEquivalent.java
new file mode 100644
index 0000000000..11186a5c7f
--- /dev/null
+++ b/qpid/java/maven/qpid-enforcer-plugin-rules/src/main/java/org/apache/qpid/maven/enforcer/rule/RequireFileContentsAreEquivalent.java
@@ -0,0 +1,104 @@
+/**
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You 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.
+ */
+package org.apache.qpid.maven.enforcer.rule;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.maven.enforcer.rule.api.EnforcerRule;
+import org.apache.maven.enforcer.rule.api.EnforcerRuleException;
+import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;
+import org.apache.maven.plugins.enforcer.AbstractStandardEnforcerRule;
+
+public class RequireFileContentsAreEquivalent extends AbstractStandardEnforcerRule
+{
+
+    final static String WHITESPACE_REGEX = "\\s+";
+    final static String EMPTY_STRING = "";
+
+    File[] files;
+
+    @Override
+    public void execute(final EnforcerRuleHelper enforcerRuleHelper) throws EnforcerRuleException
+    {
+        if (files.length < 2)
+        {
+            throw new EnforcerRuleException("The file list must contain at least two files for comparison.");
+        }
+
+        boolean success = true;
+        boolean firstTime = true;
+        String referenceContent = null;
+
+        for (final File file : files)
+        {
+            try
+            {
+                final String fileContent = FileUtils.readFileToString(file);
+                if (firstTime)
+                {
+                    referenceContent = fileContent;
+                    firstTime = false;
+                }
+                else if (referenceContent != null && fileContent != null)
+                {
+                    final String strippedReferenceContent = referenceContent.replaceAll(WHITESPACE_REGEX, EMPTY_STRING);
+                    final String strippedFileContent = fileContent.replaceAll(WHITESPACE_REGEX, EMPTY_STRING);
+                    if (!strippedReferenceContent.equalsIgnoreCase(strippedFileContent))
+                    {
+                        success = false;
+                        break;
+                    }
+                }
+                else
+                {
+                    throw new EnforcerRuleException("Unable to read file contents");
+                }
+            }
+            catch (final IOException ioe)
+            {
+                throw new EnforcerRuleException("Cannot process file : " + file.getName(), ioe);
+            }
+        }
+
+        if (!success)
+        {
+            throw new EnforcerRuleException("Files specified are not equal in content");
+        }
+    }
+
+    @Override
+    public String getCacheId()
+    {
+        return Integer.toString(Arrays.hashCode(files));
+    }
+
+    @Override
+    public boolean isCacheable()
+    {
+        return true;
+    }
+
+    @Override
+    public boolean isResultValid(EnforcerRule arg0)
+    {
+        return true;
+    }
+
+}