| /*========================================================================= |
| * Copyright (c) 2010-2014 Pivotal Software, Inc. All Rights Reserved. |
| * This product is protected by U.S. and international copyright |
| * and intellectual property laws. Pivotal products are covered by |
| * one or more patents listed at http://www.pivotal.io/patents. |
| *========================================================================= |
| */ |
| package com.gemstone.gemfire.pdx.internal; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import com.gemstone.gemfire.DataSerializer; |
| import com.gemstone.gemfire.internal.DSCODE; |
| import com.gemstone.gemfire.internal.HeapDataOutputStream; |
| import com.gemstone.gemfire.internal.InternalDataSerializer; |
| import com.gemstone.gemfire.internal.Sendable; |
| import com.gemstone.gemfire.internal.Version; |
| import com.gemstone.gemfire.internal.i18n.LocalizedStrings; |
| import com.gemstone.gemfire.pdx.PdxInstance; |
| import com.gemstone.gemfire.pdx.PdxSerializationException; |
| import com.gemstone.gemfire.pdx.WritablePdxInstance; |
| import com.gemstone.gemfire.pdx.internal.EnumInfo.PdxInstanceEnumInfo; |
| /** |
| * Used to represent an enum value as a PdxInstance |
| * @author darrel |
| * @since 6.6.2 |
| */ |
| public class PdxInstanceEnum implements PdxInstance, Sendable, ConvertableToBytes, ComparableEnum { |
| private static final long serialVersionUID = -7417287878052772302L; |
| private final String className; |
| private final String enumName; |
| private final int enumOrdinal; |
| |
| public PdxInstanceEnum(String className, String enumName, int enumOrdinal) { |
| this.className = className; |
| this.enumName = enumName; |
| this.enumOrdinal = enumOrdinal; |
| } |
| public PdxInstanceEnum(Enum<?> e) { |
| this.className = e.getDeclaringClass().getName(); |
| this.enumName = e.name(); |
| this.enumOrdinal = e.ordinal(); |
| } |
| |
| public String getClassName() { |
| return this.className; |
| } |
| public String getName() { |
| return this.enumName; |
| } |
| |
| public boolean isEnum() { |
| return true; |
| } |
| public int getOrdinal() { |
| return this.enumOrdinal; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public Object getObject() { |
| @SuppressWarnings("rawtypes") |
| Class c; |
| try { |
| c = InternalDataSerializer.getCachedClass(this.className); |
| } catch (ClassNotFoundException ex) { |
| throw new PdxSerializationException( |
| LocalizedStrings.DataSerializer_COULD_NOT_CREATE_AN_INSTANCE_OF_A_CLASS_0 |
| .toLocalizedString(this.className), ex); |
| } |
| try { |
| return Enum.valueOf(c, this.enumName); |
| } catch (IllegalArgumentException ex) { |
| throw new PdxSerializationException("Enum could not be deserialized because \"" + this.enumName + "\" is not a valid name in enum class " + c, ex); |
| } |
| } |
| |
| public boolean hasField(String fieldName) { |
| return getFieldNames().contains(fieldName); |
| } |
| |
| static private final List<String> fieldNames; |
| static { |
| ArrayList<String> tmp = new ArrayList<String>(2); |
| tmp.add("name"); |
| tmp.add("ordinal"); |
| fieldNames = Collections.unmodifiableList(tmp); |
| } |
| public List<String> getFieldNames() { |
| return fieldNames; |
| } |
| |
| public boolean isIdentityField(String fieldName) { |
| return false; |
| } |
| |
| public Object getField(String fieldName) { |
| if ("name".equals(fieldName)) { |
| return this.enumName; |
| } else if ("ordinal".equals(fieldName)) { |
| return this.enumOrdinal; |
| } |
| return null; |
| } |
| |
| public WritablePdxInstance createWriter() { |
| throw new IllegalStateException("PdxInstances that are an enum can not be modified."); |
| } |
| |
| public void sendTo(DataOutput out) throws IOException { |
| out.writeByte(DSCODE.PDX_INLINE_ENUM); |
| DataSerializer.writeString(this.className, out); |
| DataSerializer.writeString(this.enumName, out); |
| InternalDataSerializer.writeArrayLength(this.enumOrdinal, out); |
| } |
| |
| @Override |
| public int hashCode() { |
| // this hashCode needs to be kept consistent with EnumInfo.PdxInstanceEnumInfo |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((className == null) ? 0 : className.hashCode()); |
| result = prime * result + ((enumName == null) ? 0 : enumName.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (!(obj instanceof ComparableEnum)) |
| return false; |
| ComparableEnum other = (ComparableEnum) obj; |
| if (className == null) { |
| if (other.getClassName() != null) |
| return false; |
| } else if (!className.equals(other.getClassName())) |
| return false; |
| if (enumName == null) { |
| if (other.getName() != null) |
| return false; |
| } else if (!enumName.equals(other.getName())) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return this.enumName; |
| } |
| |
| public byte[] toBytes() throws IOException { |
| HeapDataOutputStream hdos = new HeapDataOutputStream(Version.CURRENT); |
| sendTo(hdos); |
| return hdos.toByteArray(); |
| } |
| public int compareTo(Object o) { |
| if (o instanceof ComparableEnum) { |
| ComparableEnum other = (ComparableEnum)o; |
| if (!getClassName().equals(other.getClassName())) { |
| throw new ClassCastException("Can not compare a " + getClassName() + " to a " + other.getClassName()); |
| } |
| return getOrdinal() - other.getOrdinal(); |
| } else { |
| throw new ClassCastException("Can not compare an instance of " + o.getClass() + " to a " + this.getClass()); |
| } |
| } |
| } |