http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
public final class org.apache.fop.fo.properties.PropertyCache<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.apache.fop.fo.properties.PropertyCache
  super_class: java.lang.Object
{
  private static final org.apache.commons.logging.Log LOG;
    descriptor: Lorg/apache/commons/logging/Log;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private final boolean useCache;
    descriptor: Z
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.util.concurrent.ConcurrentMap<java.lang.Integer, java.lang.ref.WeakReference<T>> map;
    descriptor: Ljava/util/concurrent/ConcurrentMap;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/concurrent/ConcurrentMap<Ljava/lang/Integer;Ljava/lang/ref/WeakReference<TT;>;>;

  private final java.util.concurrent.atomic.AtomicInteger putCounter;
    descriptor: Ljava/util/concurrent/atomic/AtomicInteger;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.util.concurrent.locks.Lock cleanupLock;
    descriptor: Ljava/util/concurrent/locks/Lock;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.util.concurrent.atomic.AtomicInteger hashCodeCollisionCounter;
    descriptor: Ljava/util/concurrent/atomic/AtomicInteger;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 42
            ldc Lorg/apache/fop/fo/properties/PropertyCache;
            invokestatic org.apache.commons.logging.LogFactory.getLog:(Ljava/lang/Class;)Lorg/apache/commons/logging/Log;
            putstatic org.apache.fop.fo.properties.PropertyCache.LOG:Lorg/apache/commons/logging/Log;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // org.apache.fop.fo.properties.PropertyCache this
         0: .line 78
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 82
            ldc "org.apache.fop.fo.properties.use-cache"
            ldc "true"
            invokestatic java.lang.System.getProperty:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
         2: .line 81
            invokestatic java.lang.Boolean.valueOf:(Ljava/lang/String;)Ljava/lang/Boolean;
            invokevirtual java.lang.Boolean.booleanValue:()Z
            istore 1 /* useCache */
        start local 1 // boolean useCache
         3: .line 83
            goto 7
        end local 1 // boolean useCache
      StackMap locals: org.apache.fop.fo.properties.PropertyCache
      StackMap stack: java.lang.SecurityException
         4: pop
         5: .line 84
            iconst_1
            istore 1 /* useCache */
        start local 1 // boolean useCache
         6: .line 85
            getstatic org.apache.fop.fo.properties.PropertyCache.LOG:Lorg/apache/commons/logging/Log;
            ldc "Unable to access org.apache.fop.fo.properties.use-cache due to security restriction; defaulting to 'true'."
            invokeinterface org.apache.commons.logging.Log.info:(Ljava/lang/Object;)V
         7: .line 88
      StackMap locals: int
      StackMap stack:
            iload 1 /* useCache */
            ifeq 13
         8: .line 89
            aload 0 /* this */
            new java.util.concurrent.ConcurrentHashMap
            dup
            invokespecial java.util.concurrent.ConcurrentHashMap.<init>:()V
            putfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
         9: .line 90
            aload 0 /* this */
            new java.util.concurrent.atomic.AtomicInteger
            dup
            invokespecial java.util.concurrent.atomic.AtomicInteger.<init>:()V
            putfield org.apache.fop.fo.properties.PropertyCache.putCounter:Ljava/util/concurrent/atomic/AtomicInteger;
        10: .line 91
            aload 0 /* this */
            new java.util.concurrent.locks.ReentrantLock
            dup
            invokespecial java.util.concurrent.locks.ReentrantLock.<init>:()V
            putfield org.apache.fop.fo.properties.PropertyCache.cleanupLock:Ljava/util/concurrent/locks/Lock;
        11: .line 92
            aload 0 /* this */
            new java.util.concurrent.atomic.AtomicInteger
            dup
            invokespecial java.util.concurrent.atomic.AtomicInteger.<init>:()V
            putfield org.apache.fop.fo.properties.PropertyCache.hashCodeCollisionCounter:Ljava/util/concurrent/atomic/AtomicInteger;
        12: .line 93
            goto 17
        13: .line 94
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aconst_null
            putfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
        14: .line 95
            aload 0 /* this */
            aconst_null
            putfield org.apache.fop.fo.properties.PropertyCache.putCounter:Ljava/util/concurrent/atomic/AtomicInteger;
        15: .line 96
            aload 0 /* this */
            aconst_null
            putfield org.apache.fop.fo.properties.PropertyCache.cleanupLock:Ljava/util/concurrent/locks/Lock;
        16: .line 97
            aload 0 /* this */
            aconst_null
            putfield org.apache.fop.fo.properties.PropertyCache.hashCodeCollisionCounter:Ljava/util/concurrent/atomic/AtomicInteger;
        17: .line 99
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iload 1 /* useCache */
            putfield org.apache.fop.fo.properties.PropertyCache.useCache:Z
        18: .line 100
            return
        end local 1 // boolean useCache
        end local 0 // org.apache.fop.fo.properties.PropertyCache this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   19     0      this  Lorg/apache/fop/fo/properties/PropertyCache<TT;>;
            3    4     1  useCache  Z
            6   19     1  useCache  Z
      Exception table:
        from    to  target  type
           1     3       4  Class java.lang.SecurityException

  public T fetch();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=5, args_size=2
        start local 0 // org.apache.fop.fo.properties.PropertyCache this
        start local 1 // java.lang.Object obj
         0: .line 110
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.useCache:Z
            ifne 2
         1: .line 111
            aload 1 /* obj */
            areturn
         2: .line 114
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            ifnonnull 4
         3: .line 115
            aconst_null
            areturn
         4: .line 118
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            invokevirtual java.lang.Object.hashCode:()I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            astore 2 /* hashCode */
        start local 2 // java.lang.Integer hashCode
         5: .line 120
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
            aload 2 /* hashCode */
            invokeinterface java.util.concurrent.ConcurrentMap.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.ref.WeakReference
            astore 3 /* weakRef */
        start local 3 // java.lang.ref.WeakReference weakRef
         6: .line 121
            aload 3 /* weakRef */
            ifnonnull 11
         7: .line 122
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
            aload 2 /* hashCode */
            new java.lang.ref.WeakReference
            dup
            aload 1 /* obj */
            invokespecial java.lang.ref.WeakReference.<init>:(Ljava/lang/Object;)V
            invokeinterface java.util.concurrent.ConcurrentMap.putIfAbsent:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.ref.WeakReference
            astore 3 /* weakRef */
         8: .line 123
            aload 0 /* this */
            invokevirtual org.apache.fop.fo.properties.PropertyCache.attemptCleanup:()V
         9: .line 125
            aload 3 /* weakRef */
            ifnonnull 11
        10: .line 126
            aload 1 /* obj */
            areturn
        11: .line 131
      StackMap locals: java.lang.Integer java.lang.ref.WeakReference
      StackMap stack:
            aload 3 /* weakRef */
            invokevirtual java.lang.ref.WeakReference.get:()Ljava/lang/Object;
            astore 4 /* cached */
        start local 4 // java.lang.Object cached
        12: .line 132
            aload 4 /* cached */
            ifnull 19
        13: .line 133
            aload 0 /* this */
            aload 4 /* cached */
            aload 1 /* obj */
            invokevirtual org.apache.fop.fo.properties.PropertyCache.eq:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifeq 15
        14: .line 134
            aload 4 /* cached */
            areturn
        15: .line 141
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.hashCodeCollisionCounter:Ljava/util/concurrent/atomic/AtomicInteger;
            invokevirtual java.util.concurrent.atomic.AtomicInteger.incrementAndGet:()I
            bipush 10
            irem
            ifne 19
        16: .line 142
            getstatic org.apache.fop.fo.properties.PropertyCache.LOG:Lorg/apache/commons/logging/Log;
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.hashCodeCollisionCounter:Ljava/util/concurrent/atomic/AtomicInteger;
            invokevirtual java.util.concurrent.atomic.AtomicInteger.get:()I
            invokestatic java.lang.String.valueOf:(I)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " hashCode() collisions for "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        17: .line 143
            aload 1 /* obj */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        18: .line 142
            invokeinterface org.apache.commons.logging.Log.info:(Ljava/lang/Object;)V
        19: .line 150
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
            aload 2 /* hashCode */
            new java.lang.ref.WeakReference
            dup
            aload 1 /* obj */
            invokespecial java.lang.ref.WeakReference.<init>:(Ljava/lang/Object;)V
            invokeinterface java.util.concurrent.ConcurrentMap.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        20: .line 151
            aload 0 /* this */
            invokevirtual org.apache.fop.fo.properties.PropertyCache.attemptCleanup:()V
        21: .line 152
            aload 1 /* obj */
            areturn
        end local 4 // java.lang.Object cached
        end local 3 // java.lang.ref.WeakReference weakRef
        end local 2 // java.lang.Integer hashCode
        end local 1 // java.lang.Object obj
        end local 0 // org.apache.fop.fo.properties.PropertyCache this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   22     0      this  Lorg/apache/fop/fo/properties/PropertyCache<TT;>;
            0   22     1       obj  TT;
            5   22     2  hashCode  Ljava/lang/Integer;
            6   22     3   weakRef  Ljava/lang/ref/WeakReference<TT;>;
           12   22     4    cached  TT;
    Signature: (TT;)TT;
    MethodParameters:
      Name  Flags
      obj   

  private void attemptCleanup();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // org.apache.fop.fo.properties.PropertyCache this
         0: .line 164
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.putCounter:Ljava/util/concurrent/atomic/AtomicInteger;
            invokevirtual java.util.concurrent.atomic.AtomicInteger.incrementAndGet:()I
            sipush 10000
            irem
            ifeq 2
         1: .line 165
            return
         2: .line 170
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.cleanupLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.tryLock:()Z
            ifeq 9
         3: .line 172
            aload 0 /* this */
            invokevirtual org.apache.fop.fo.properties.PropertyCache.cleanReclaimedMapEntries:()V
         4: .line 173
            goto 8
      StackMap locals:
      StackMap stack: java.lang.Throwable
         5: astore 1
         6: .line 174
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.cleanupLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.unlock:()V
         7: .line 175
            aload 1
            athrow
         8: .line 174
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.cleanupLock:Ljava/util/concurrent/locks/Lock;
            invokeinterface java.util.concurrent.locks.Lock.unlock:()V
         9: .line 177
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.apache.fop.fo.properties.PropertyCache this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   10     0  this  Lorg/apache/fop/fo/properties/PropertyCache<TT;>;
      Exception table:
        from    to  target  type
           3     5       5  any

  private void cleanReclaimedMapEntries();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=5, args_size=1
        start local 0 // org.apache.fop.fo.properties.PropertyCache this
         0: .line 180
            aload 0 /* this */
            getfield org.apache.fop.fo.properties.PropertyCache.map:Ljava/util/concurrent/ConcurrentMap;
            invokeinterface java.util.concurrent.ConcurrentMap.entrySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 1 /* iterator */
        start local 1 // java.util.Iterator iterator
         1: .line 181
            goto 7
         2: .line 182
      StackMap locals: java.util.Iterator
      StackMap stack:
            aload 1 /* iterator */
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.util.Map$Entry
            astore 2 /* entry */
        start local 2 // java.util.Map$Entry entry
         3: .line 183
            aload 2 /* entry */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            checkcast java.lang.ref.WeakReference
            astore 3 /* weakRef */
        start local 3 // java.lang.ref.WeakReference weakRef
         4: .line 184
            aload 3 /* weakRef */
            invokevirtual java.lang.ref.WeakReference.get:()Ljava/lang/Object;
            astore 4 /* r */
        start local 4 // java.lang.Object r
         5: .line 185
            aload 4 /* r */
            ifnonnull 7
         6: .line 186
            aload 1 /* iterator */
            invokeinterface java.util.Iterator.remove:()V
        end local 4 // java.lang.Object r
        end local 3 // java.lang.ref.WeakReference weakRef
        end local 2 // java.util.Map$Entry entry
         7: .line 181
      StackMap locals:
      StackMap stack:
            aload 1 /* iterator */
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
         8: .line 189
            return
        end local 1 // java.util.Iterator iterator
        end local 0 // org.apache.fop.fo.properties.PropertyCache this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    9     0      this  Lorg/apache/fop/fo/properties/PropertyCache<TT;>;
            1    9     1  iterator  Ljava/util/Iterator<Ljava/util/Map$Entry<Ljava/lang/Integer;Ljava/lang/ref/WeakReference<TT;>;>;>;
            3    7     2     entry  Ljava/util/Map$Entry<Ljava/lang/Integer;Ljava/lang/ref/WeakReference<TT;>;>;
            4    7     3   weakRef  Ljava/lang/ref/WeakReference<TT;>;
            5    7     4         r  TT;

  private boolean eq(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.apache.fop.fo.properties.PropertyCache this
        start local 1 // java.lang.Object p
        start local 2 // java.lang.Object q
         0: .line 192
            aload 1 /* p */
            aload 2 /* q */
            if_acmpeq 1
            aload 1 /* p */
            aload 2 /* q */
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifne 1
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_1
            ireturn
        end local 2 // java.lang.Object q
        end local 1 // java.lang.Object p
        end local 0 // org.apache.fop.fo.properties.PropertyCache this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/apache/fop/fo/properties/PropertyCache<TT;>;
            0    2     1     p  Ljava/lang/Object;
            0    2     2     q  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      p     
      q     
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "PropertyCache.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map