http://xmlgraphics.apache.org/commons/: Apache XML Graphics Commons is a library that consists of several reusable components used by Apache Batik and Apache FOP. Many of these components can easily be used separately outside the domains of SVG and XSL-FO. (Apache Software Foundation) 
public class org.apache.xmlgraphics.xmp.merge.MergeRuleSet
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.xmlgraphics.xmp.merge.MergeRuleSet
  super_class: java.lang.Object
{
  private java.util.Map rules;
    descriptor: Ljava/util/Map;
    flags: (0x0002) ACC_PRIVATE

  private org.apache.xmlgraphics.xmp.merge.PropertyMerger defaultMerger;
    descriptor: Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
         0: .line 37
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 33
            aload 0 /* this */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            putfield org.apache.xmlgraphics.xmp.merge.MergeRuleSet.rules:Ljava/util/Map;
         2: .line 34
            aload 0 /* this */
            new org.apache.xmlgraphics.xmp.merge.ReplacePropertyMerger
            dup
            invokespecial org.apache.xmlgraphics.xmp.merge.ReplacePropertyMerger.<init>:()V
            putfield org.apache.xmlgraphics.xmp.merge.MergeRuleSet.defaultMerger:Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
         3: .line 38
            return
        end local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/apache/xmlgraphics/xmp/merge/MergeRuleSet;

  public org.apache.xmlgraphics.xmp.merge.PropertyMerger getPropertyMergerFor(org.apache.xmlgraphics.xmp.XMPProperty);
    descriptor: (Lorg/apache/xmlgraphics/xmp/XMPProperty;)Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
        start local 1 // org.apache.xmlgraphics.xmp.XMPProperty prop
         0: .line 46
            aload 0 /* this */
            getfield org.apache.xmlgraphics.xmp.merge.MergeRuleSet.rules:Ljava/util/Map;
            aload 1 /* prop */
            invokevirtual org.apache.xmlgraphics.xmp.XMPProperty.getName:()Lorg/apache/xmlgraphics/util/QName;
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.apache.xmlgraphics.xmp.merge.PropertyMerger
            astore 2 /* merger */
        start local 2 // org.apache.xmlgraphics.xmp.merge.PropertyMerger merger
         1: .line 47
            aload 2 /* merger */
            ifnull 2
            aload 2 /* merger */
            goto 3
      StackMap locals: org.apache.xmlgraphics.xmp.merge.PropertyMerger
      StackMap stack:
         2: aload 0 /* this */
            getfield org.apache.xmlgraphics.xmp.merge.MergeRuleSet.defaultMerger:Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
      StackMap locals:
      StackMap stack: org.apache.xmlgraphics.xmp.merge.PropertyMerger
         3: areturn
        end local 2 // org.apache.xmlgraphics.xmp.merge.PropertyMerger merger
        end local 1 // org.apache.xmlgraphics.xmp.XMPProperty prop
        end local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/apache/xmlgraphics/xmp/merge/MergeRuleSet;
            0    4     1    prop  Lorg/apache/xmlgraphics/xmp/XMPProperty;
            1    4     2  merger  Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
    MethodParameters:
      Name  Flags
      prop  

  public void addRule(org.apache.xmlgraphics.util.QName, org.apache.xmlgraphics.xmp.merge.PropertyMerger);
    descriptor: (Lorg/apache/xmlgraphics/util/QName;Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
        start local 1 // org.apache.xmlgraphics.util.QName propName
        start local 2 // org.apache.xmlgraphics.xmp.merge.PropertyMerger merger
         0: .line 56
            aload 0 /* this */
            getfield org.apache.xmlgraphics.xmp.merge.MergeRuleSet.rules:Ljava/util/Map;
            aload 1 /* propName */
            aload 2 /* merger */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         1: .line 57
            return
        end local 2 // org.apache.xmlgraphics.xmp.merge.PropertyMerger merger
        end local 1 // org.apache.xmlgraphics.util.QName propName
        end local 0 // org.apache.xmlgraphics.xmp.merge.MergeRuleSet this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lorg/apache/xmlgraphics/xmp/merge/MergeRuleSet;
            0    2     1  propName  Lorg/apache/xmlgraphics/util/QName;
            0    2     2    merger  Lorg/apache/xmlgraphics/xmp/merge/PropertyMerger;
    MethodParameters:
          Name  Flags
      propName  
      merger    
}
SourceFile: "MergeRuleSet.java"