--- /dev/null
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.thrift;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.thrift.protocol.TField;
+import org.apache.thrift.protocol.TProtocol;
+import org.apache.thrift.protocol.TProtocolException;
+import org.apache.thrift.protocol.TStruct;
+import org.apache.thrift.scheme.IScheme;
+import org.apache.thrift.scheme.SchemeFactory;
+import org.apache.thrift.scheme.StandardScheme;
+import org.apache.thrift.scheme.TupleScheme;
+
+public abstract class TUnion<T extends TUnion<T,F>, F extends TFieldIdEnum> implements TBase<T, F> {
+
+ protected Object value_;
+ protected F setField_;
+
+ protected TUnion() {
+ setField_ = null;
+ value_ = null;
+ }
+
+ private static final Map<Class<? extends IScheme>, SchemeFactory> schemes = new HashMap<Class<? extends IScheme>, SchemeFactory>();
+ static {
+ schemes.put(StandardScheme.class, new TUnionStandardSchemeFactory());
+ schemes.put(TupleScheme.class, new TUnionTupleSchemeFactory());
+ }
+
+ protected TUnion(F setField, Object value) {
+ setFieldValue(setField, value);
+ }
+
+ protected TUnion(TUnion<T, F> other) {
+ if (!other.getClass().equals(this.getClass())) {
+ throw new ClassCastException();
+ }
+ setField_ = other.setField_;
+ value_ = deepCopyObject(other.value_);
+ }
+
+ private static Object deepCopyObject(Object o) {
+ if (o instanceof TBase) {
+ return ((TBase)o).deepCopy();
+ } else if (o instanceof ByteBuffer) {
+ return TBaseHelper.copyBinary((ByteBuffer)o);
+ } else if (o instanceof List) {
+ return deepCopyList((List)o);
+ } else if (o instanceof Set) {
+ return deepCopySet((Set)o);
+ } else if (o instanceof Map) {
+ return deepCopyMap((Map)o);
+ } else {
+ return o;
+ }
+ }
+
+ private static Map deepCopyMap(Map<Object, Object> map) {
+ Map copy = new HashMap(map.size());
+ for (Map.Entry<Object, Object> entry : map.entrySet()) {
+ copy.put(deepCopyObject(entry.getKey()), deepCopyObject(entry.getValue()));
+ }
+ return copy;
+ }
+
+ private static Set deepCopySet(Set set) {
+ Set copy = new HashSet(set.size());
+ for (Object o : set) {
+ copy.add(deepCopyObject(o));
+ }
+ return copy;
+ }
+
+ private static List deepCopyList(List list) {
+ List copy = new ArrayList(list.size());
+ for (Object o : list) {
+ copy.add(deepCopyObject(o));
+ }
+ return copy;
+ }
+
+ public F getSetField() {
+ return setField_;
+ }
+
+ public Object getFieldValue() {
+ return value_;
+ }
+
+ public Object getFieldValue(F fieldId) {
+ if (fieldId != setField_) {
+ throw new IllegalArgumentException("Cannot get the value of field " + fieldId + " because union's set field is " + setField_);
+ }
+
+ return getFieldValue();
+ }
+
+ public Object getFieldValue(int fieldId) {
+ return getFieldValue(enumForId((short)fieldId));
+ }
+
+ public boolean isSet() {
+ return setField_ != null;
+ }
+
+ public boolean isSet(F fieldId) {
+ return setField_ == fieldId;
+ }
+
+ public boolean isSet(int fieldId) {
+ return isSet(enumForId((short)fieldId));
+ }
+
+ public void read(TProtocol iprot) throws TException {
+ schemes.get(iprot.getScheme()).getScheme().read(iprot, this);
+ }
+
+ public void setFieldValue(F fieldId, Object value) {
+ checkType(fieldId, value);
+ setField_ = fieldId;
+ value_ = value;
+ }
+
+ public void setFieldValue(int fieldId, Object value) {
+ setFieldValue(enumForId((short)fieldId), value);
+ }
+
+ public void write(TProtocol oprot) throws TException {
+ schemes.get(oprot.getScheme()).getScheme().write(oprot, this);
+ }
+
+ /**
+ * Implementation should be generated so that we can efficiently type check
+ * various values.
+ * @param setField
+ * @param value
+ */
+ protected abstract void checkType(F setField, Object value) throws ClassCastException;
+
+ /**
+ * Implementation should be generated to read the right stuff from the wire
+ * based on the field header.
+ * @param field
+ * @return read Object based on the field header, as specified by the argument.
+ */
+ protected abstract Object standardSchemeReadValue(TProtocol iprot, TField field) throws TException;
+ protected abstract void standardSchemeWriteValue(TProtocol oprot) throws TException;
+
+ protected abstract Object tupleSchemeReadValue(TProtocol iprot, short fieldID) throws TException;
+ protected abstract void tupleSchemeWriteValue(TProtocol oprot) throws TException;
+
+ protected abstract TStruct getStructDesc();
+
+ protected abstract TField getFieldDesc(F setField);
+
+ protected abstract F enumForId(short id);
+
+ @Override
+ public String toString() {
+ StringBuilder sb = new StringBuilder();
+ sb.append("<");
+ sb.append(this.getClass().getSimpleName());
+ sb.append(" ");
+
+ if (getSetField() != null) {
+ Object v = getFieldValue();
+ sb.append(getFieldDesc(getSetField()).name);
+ sb.append(":");
+ if(v instanceof ByteBuffer) {
+ TBaseHelper.toString((ByteBuffer)v, sb);
+ } else {
+ sb.append(v.toString());
+ }
+ }
+ sb.append(">");
+ return sb.toString();
+ }
+
+ public final void clear() {
+ this.setField_ = null;
+ this.value_ = null;
+ }
+
+ private static class TUnionStandardSchemeFactory implements SchemeFactory {
+ public TUnionStandardScheme getScheme() {
+ return new TUnionStandardScheme();
+ }
+ }
+
+ private static class TUnionStandardScheme extends StandardScheme<TUnion> {
+
+ @Override
+ public void read(TProtocol iprot, TUnion struct) throws TException {
+ struct.setField_ = null;
+ struct.value_ = null;
+
+ iprot.readStructBegin();
+
+ TField field = iprot.readFieldBegin();
+
+ struct.value_ = struct.standardSchemeReadValue(iprot, field);
+ if (struct.value_ != null) {
+ struct.setField_ = struct.enumForId(field.id);
+ }
+
+ iprot.readFieldEnd();
+ // this is so that we will eat the stop byte. we could put a check here to
+ // make sure that it actually *is* the stop byte, but it's faster to do it
+ // this way.
+ iprot.readFieldBegin();
+ iprot.readStructEnd();
+ }
+
+ @Override
+ public void write(TProtocol oprot, TUnion struct) throws TException {
+ if (struct.getSetField() == null || struct.getFieldValue() == null) {
+ throw new TProtocolException("Cannot write a TUnion with no set value!");
+ }
+ oprot.writeStructBegin(struct.getStructDesc());
+ oprot.writeFieldBegin(struct.getFieldDesc(struct.setField_));
+ struct.standardSchemeWriteValue(oprot);
+ oprot.writeFieldEnd();
+ oprot.writeFieldStop();
+ oprot.writeStructEnd();
+ }
+ }
+
+ private static class TUnionTupleSchemeFactory implements SchemeFactory {
+ public TUnionTupleScheme getScheme() {
+ return new TUnionTupleScheme();
+ }
+ }
+
+ private static class TUnionTupleScheme extends TupleScheme<TUnion> {
+
+ @Override
+ public void read(TProtocol iprot, TUnion struct) throws TException {
+ struct.setField_ = null;
+ struct.value_ = null;
+ short fieldID = iprot.readI16();
+ struct.value_ = struct.tupleSchemeReadValue(iprot, fieldID);
+ if (struct.value_ != null) {
+ struct.setField_ = struct.enumForId(fieldID);
+ }
+ }
+
+ @Override
+ public void write(TProtocol oprot, TUnion struct) throws TException {
+ if (struct.getSetField() == null || struct.getFieldValue() == null) {
+ throw new TProtocolException("Cannot write a TUnion with no set value!");
+ }
+ oprot.writeI16(struct.setField_.getThriftFieldId());
+ struct.tupleSchemeWriteValue(oprot);
+ }
+ }
+}
projects / ceph.git / blobdiff