From c7d89b31e7764c514138135f91b2e290d410ebc7 Mon Sep 17 00:00:00 2001
From: Mikolaj Izdebski <mizdebsk@redhat.com>
Date: Thu, 22 Nov 2012 15:28:28 +0100
Subject: [PATCH] Customize compiler plugin

In local mode require source to be >= 1.5 and target >= source.
---
 .../model/validation/DefaultModelValidator.java    | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java b/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java
index 6c76173..bc0b836 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java
@@ -19,6 +19,10 @@ package org.apache.maven.model.validation;
  * under the License.
  */
 
+import java.math.BigDecimal;
+import java.util.LinkedList;
+import org.codehaus.plexus.util.xml.Xpp3Dom;
+
 import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -342,6 +346,8 @@ public class DefaultModelValidator
                                     "distributionManagement.snapshotRepository", request );
             }
         }
+
+        customizeModel( model );
     }
 
     private void validateRawDependencies( ModelProblemCollector problems, List<Dependency> dependencies, String prefix,
@@ -924,4 +930,66 @@ public class DefaultModelValidator
         }
     }
 
+    private void customizeModel( Model model )
+    {
+        // Enable model customizations only in local mode
+        if ( System.getProperty( "maven.local.mode" ) == null )
+            return;
+
+        Build build = model.getBuild();
+        if ( build == null )
+            return;
+
+        List<Plugin> plugins = build.getPlugins();
+        if ( plugins == null )
+            return;
+
+        for ( Plugin plugin : plugins )
+        {
+            String groupId = plugin.getGroupId();
+            String artifactId = plugin.getArtifactId();
+
+            if ( groupId.equals( "org.apache.maven.plugins" ) && artifactId.equals( "maven-compiler-plugin" ) )
+                customizeCompilerPlugin( plugin );
+        }
+    }
+
+    private void customizeCompilerPlugin( Plugin plugin )
+    {
+        List<Object> configurations = new LinkedList<Object>();
+        configurations.add( plugin.getConfiguration() );
+
+        List<PluginExecution> executions = plugin.getExecutions();
+        for ( PluginExecution exec : executions )
+            configurations.add( exec.getConfiguration() );
+
+        for ( Object configObj : configurations )
+        {
+            try
+            {
+                Xpp3Dom config = (Xpp3Dom) configObj;
+                BigDecimal source = new BigDecimal( config.getChild( "source" ).getValue() );
+                BigDecimal target = new BigDecimal( config.getChild( "target" ).getValue() );
+
+                // Source must be at least 1.5
+                BigDecimal minSource = new BigDecimal( "1.5" );
+                if ( source.compareTo( minSource ) < 0 )
+                    source = minSource;
+
+                // Target must not be less than source
+                if ( target.compareTo( source ) < 0 )
+                    target = source;
+
+                config.getChild( "source" ).setValue( source.toString() );
+                config.getChild( "target" ).setValue( target.toString() );
+            }
+            catch ( NullPointerException e )
+            {
+            }
+            catch ( NumberFormatException e )
+            {
+            }
+        }
+    }
+
 }
-- 
1.7.11.7