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| package org.jboss.cache.pojo.impl; |
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| import org.jboss.cache.Fqn; |
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| import java.io.Serializable; |
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| import java.util.ArrayList; |
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| import java.util.Collections; |
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| import java.util.List; |
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| public class PojoInstance implements Serializable |
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| { |
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| public static final String KEY = InternalConstant.POJOCACHE_KEY_PREFIX + "PojoInstance"; |
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| public static final int INITIAL_COUNTER_VALUE = -1; |
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| static final long serialVersionUID = 6492134565825613209L; |
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| private transient Object instance_; |
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| private String internalFqn_ = null; |
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| private int refCount_ = INITIAL_COUNTER_VALUE; |
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| private List<Fqn> referencedBy_ = null; |
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| private Class clazz_ = null; |
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| private transient PojoUtil util_ = new PojoUtil(); |
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| public PojoInstance()
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| { |
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| } |
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| public PojoInstance(Object instance)
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| { |
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| set(instance);
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| } |
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| public void setPojoClass(Class clazz)
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| { |
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| clazz_ = clazz;
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| } |
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| public Class getPojoClass()
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| { |
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| return clazz_;
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| } |
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| public Object get()
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| { |
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| return instance_;
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| } |
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| public void set(Object instance)
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| { |
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| instance_ = instance;
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| } |
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| public String getInternalFqn()
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| { |
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| return internalFqn_;
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| } |
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| public void setInternalFqn(String refFqn)
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| { |
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| internalFqn_ = refFqn;
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| } |
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| public void removeInternalFqn()
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| { |
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| internalFqn_ = null;
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| } |
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| synchronized public int incrementRefCount(Fqn sourceFqn)
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| { |
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| if (sourceFqn == null)
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| { |
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| throw new IllegalStateException("PojoInstance.incrementRefCount(): null sourceFqn");
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| } |
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| if (referencedBy_ == null)
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| { |
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| referencedBy_ = new ArrayList();
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| } |
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| if (referencedBy_.contains(sourceFqn))
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| throw new IllegalStateException("PojoReference.incrementRefCount(): source fqn: " +
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| sourceFqn + " is already present."); |
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| if (util_ == null) util_ = new PojoUtil();
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| refCount_ = util_.incrementReferenceCount(sourceFqn, refCount_, referencedBy_);
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| return refCount_;
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| } |
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| synchronized public int decrementRefCount(Fqn sourceFqn)
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| { |
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| if (sourceFqn == null)
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| { |
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| throw new IllegalStateException("PojoInstance.incrementRefCount(): null sourceFqn");
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| } |
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| if (!referencedBy_.contains(sourceFqn))
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| throw new IllegalStateException("PojoReference.decrementRefCount(): source fqn: " +
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| sourceFqn + " is not present."); |
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| if (util_ == null) util_ = new PojoUtil();
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| refCount_ = util_.decrementReferenceCount(sourceFqn, refCount_, referencedBy_);
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| return refCount_;
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| } |
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| synchronized public int getRefCount()
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| { |
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| return refCount_;
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| } |
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| public List<Fqn> getReferences()
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| { |
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| return Collections.unmodifiableList(referencedBy_);
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| } |
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| synchronized public Fqn getAndRemoveFirstFqnInList()
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| { |
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| return (Fqn) referencedBy_.remove(0);
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| } |
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| synchronized public void addXFqnIntoList(Fqn fqn)
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| { |
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| referencedBy_.add(0, fqn);
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| } |
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| public String toString()
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| { |
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| return "PI[fqn=" + internalFqn_ + " ref=" + refCount_ + " class=" + clazz_.getName() + "]";
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| } |
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| } |