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Diffstat (limited to 'java/src/main/java/com/google/protobuf/UnknownFieldSet.java')
| -rw-r--r-- | java/src/main/java/com/google/protobuf/UnknownFieldSet.java | 947 |
1 files changed, 947 insertions, 0 deletions
diff --git a/java/src/main/java/com/google/protobuf/UnknownFieldSet.java b/java/src/main/java/com/google/protobuf/UnknownFieldSet.java new file mode 100644 index 0000000..7f7e493 --- /dev/null +++ b/java/src/main/java/com/google/protobuf/UnknownFieldSet.java @@ -0,0 +1,947 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// http://code.google.com/p/protobuf/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +package com.google.protobuf; + +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Map; +import java.util.TreeMap; + +/** + * {@code UnknownFieldSet} is used to keep track of fields which were seen when + * parsing a protocol message but whose field numbers or types are unrecognized. + * This most frequently occurs when new fields are added to a message type + * and then messages containing those feilds are read by old software that was + * compiled before the new types were added. + * + * <p>Every {@link Message} contains an {@code UnknownFieldSet} (and every + * {@link Message.Builder} contains an {@link Builder}). + * + * <p>Most users will never need to use this class. + * + * @author kenton@google.com Kenton Varda + */ +public final class UnknownFieldSet implements MessageLite { + private UnknownFieldSet() {} + + /** Create a new {@link Builder}. */ + public static Builder newBuilder() { + return Builder.create(); + } + + /** + * Create a new {@link Builder} and initialize it to be a copy + * of {@code copyFrom}. + */ + public static Builder newBuilder(final UnknownFieldSet copyFrom) { + return newBuilder().mergeFrom(copyFrom); + } + + /** Get an empty {@code UnknownFieldSet}. */ + public static UnknownFieldSet getDefaultInstance() { + return defaultInstance; + } + public UnknownFieldSet getDefaultInstanceForType() { + return defaultInstance; + } + private static final UnknownFieldSet defaultInstance = + new UnknownFieldSet(Collections.<Integer, Field>emptyMap()); + + /** + * Construct an {@code UnknownFieldSet} around the given map. The map is + * expected to be immutable. + */ + private UnknownFieldSet(final Map<Integer, Field> fields) { + this.fields = fields; + } + private Map<Integer, Field> fields; + + @Override + public boolean equals(final Object other) { + if (this == other) { + return true; + } + return (other instanceof UnknownFieldSet) && + fields.equals(((UnknownFieldSet) other).fields); + } + + @Override + public int hashCode() { + return fields.hashCode(); + } + + /** Get a map of fields in the set by number. */ + public Map<Integer, Field> asMap() { + return fields; + } + + /** Check if the given field number is present in the set. */ + public boolean hasField(final int number) { + return fields.containsKey(number); + } + + /** + * Get a field by number. Returns an empty field if not present. Never + * returns {@code null}. + */ + public Field getField(final int number) { + final Field result = fields.get(number); + return (result == null) ? Field.getDefaultInstance() : result; + } + + /** Serializes the set and writes it to {@code output}. */ + public void writeTo(final CodedOutputStream output) throws IOException { + for (final Map.Entry<Integer, Field> entry : fields.entrySet()) { + entry.getValue().writeTo(entry.getKey(), output); + } + } + + /** + * Converts the set to a string in protocol buffer text format. This is + * just a trivial wrapper around + * {@link TextFormat#printToString(UnknownFieldSet)}. + */ + @Override + public String toString() { + return TextFormat.printToString(this); + } + + /** + * Serializes the message to a {@code ByteString} and returns it. This is + * just a trivial wrapper around {@link #writeTo(CodedOutputStream)}. + */ + public ByteString toByteString() { + try { + final ByteString.CodedBuilder out = + ByteString.newCodedBuilder(getSerializedSize()); + writeTo(out.getCodedOutput()); + return out.build(); + } catch (final IOException e) { + throw new RuntimeException( + "Serializing to a ByteString threw an IOException (should " + + "never happen).", e); + } + } + + /** + * Serializes the message to a {@code byte} array and returns it. This is + * just a trivial wrapper around {@link #writeTo(CodedOutputStream)}. + */ + public byte[] toByteArray() { + try { + final byte[] result = new byte[getSerializedSize()]; + final CodedOutputStream output = CodedOutputStream.newInstance(result); + writeTo(output); + output.checkNoSpaceLeft(); + return result; + } catch (final IOException e) { + throw new RuntimeException( + "Serializing to a byte array threw an IOException " + + "(should never happen).", e); + } + } + + /** + * Serializes the message and writes it to {@code output}. This is just a + * trivial wrapper around {@link #writeTo(CodedOutputStream)}. + */ + public void writeTo(final OutputStream output) throws IOException { + final CodedOutputStream codedOutput = CodedOutputStream.newInstance(output); + writeTo(codedOutput); + codedOutput.flush(); + } + + public void writeDelimitedTo(OutputStream output) throws IOException { + final CodedOutputStream codedOutput = CodedOutputStream.newInstance(output); + codedOutput.writeRawVarint32(getSerializedSize()); + writeTo(codedOutput); + codedOutput.flush(); + } + + /** Get the number of bytes required to encode this set. */ + public int getSerializedSize() { + int result = 0; + for (final Map.Entry<Integer, Field> entry : fields.entrySet()) { + result += entry.getValue().getSerializedSize(entry.getKey()); + } + return result; + } + + /** + * Serializes the set and writes it to {@code output} using + * {@code MessageSet} wire format. + */ + public void writeAsMessageSetTo(final CodedOutputStream output) + throws IOException { + for (final Map.Entry<Integer, Field> entry : fields.entrySet()) { + entry.getValue().writeAsMessageSetExtensionTo( + entry.getKey(), output); + } + } + + /** + * Get the number of bytes required to encode this set using + * {@code MessageSet} wire format. + */ + public int getSerializedSizeAsMessageSet() { + int result = 0; + for (final Map.Entry<Integer, Field> entry : fields.entrySet()) { + result += entry.getValue().getSerializedSizeAsMessageSetExtension( + entry.getKey()); + } + return result; + } + + public boolean isInitialized() { + // UnknownFieldSets do not have required fields, so they are always + // initialized. + return true; + } + + /** Parse an {@code UnknownFieldSet} from the given input stream. */ + public static UnknownFieldSet parseFrom(final CodedInputStream input) + throws IOException { + return newBuilder().mergeFrom(input).build(); + } + + /** Parse {@code data} as an {@code UnknownFieldSet} and return it. */ + public static UnknownFieldSet parseFrom(final ByteString data) + throws InvalidProtocolBufferException { + return newBuilder().mergeFrom(data).build(); + } + + /** Parse {@code data} as an {@code UnknownFieldSet} and return it. */ + public static UnknownFieldSet parseFrom(final byte[] data) + throws InvalidProtocolBufferException { + return newBuilder().mergeFrom(data).build(); + } + + /** Parse an {@code UnknownFieldSet} from {@code input} and return it. */ + public static UnknownFieldSet parseFrom(final InputStream input) + throws IOException { + return newBuilder().mergeFrom(input).build(); + } + + public Builder newBuilderForType() { + return newBuilder(); + } + + public Builder toBuilder() { + return newBuilder().mergeFrom(this); + } + + /** + * Builder for {@link UnknownFieldSet}s. + * + * <p>Note that this class maintains {@link Field.Builder}s for all fields + * in the set. Thus, adding one element to an existing {@link Field} does not + * require making a copy. This is important for efficient parsing of + * unknown repeated fields. However, it implies that {@link Field}s cannot + * be constructed independently, nor can two {@link UnknownFieldSet}s share + * the same {@code Field} object. + * + * <p>Use {@link UnknownFieldSet#newBuilder()} to construct a {@code Builder}. + */ + public static final class Builder implements MessageLite.Builder { + // This constructor should never be called directly (except from 'create'). + private Builder() {} + + private Map<Integer, Field> fields; + + // Optimization: We keep around a builder for the last field that was + // modified so that we can efficiently add to it multiple times in a + // row (important when parsing an unknown repeated field). + private int lastFieldNumber; + private Field.Builder lastField; + + private static Builder create() { + Builder builder = new Builder(); + builder.reinitialize(); + return builder; + } + + /** + * Get a field builder for the given field number which includes any + * values that already exist. + */ + private Field.Builder getFieldBuilder(final int number) { + if (lastField != null) { + if (number == lastFieldNumber) { + return lastField; + } + // Note: addField() will reset lastField and lastFieldNumber. + addField(lastFieldNumber, lastField.build()); + } + if (number == 0) { + return null; + } else { + final Field existing = fields.get(number); + lastFieldNumber = number; + lastField = Field.newBuilder(); + if (existing != null) { + lastField.mergeFrom(existing); + } + return lastField; + } + } + + /** + * Build the {@link UnknownFieldSet} and return it. + * + * <p>Once {@code build()} has been called, the {@code Builder} will no + * longer be usable. Calling any method after {@code build()} will result + * in undefined behavior and can cause a {@code NullPointerException} to be + * thrown. + */ + public UnknownFieldSet build() { + getFieldBuilder(0); // Force lastField to be built. + final UnknownFieldSet result; + if (fields.isEmpty()) { + result = getDefaultInstance(); + } else { + result = new UnknownFieldSet(Collections.unmodifiableMap(fields)); + } + fields = null; + return result; + } + + public UnknownFieldSet buildPartial() { + // No required fields, so this is the same as build(). + return build(); + } + + @Override + public Builder clone() { + getFieldBuilder(0); // Force lastField to be built. + return UnknownFieldSet.newBuilder().mergeFrom( + new UnknownFieldSet(fields)); + } + + public UnknownFieldSet getDefaultInstanceForType() { + return UnknownFieldSet.getDefaultInstance(); + } + + private void reinitialize() { + fields = Collections.emptyMap(); + lastFieldNumber = 0; + lastField = null; + } + + /** Reset the builder to an empty set. */ + public Builder clear() { + reinitialize(); + return this; + } + + /** + * Merge the fields from {@code other} into this set. If a field number + * exists in both sets, {@code other}'s values for that field will be + * appended to the values in this set. + */ + public Builder mergeFrom(final UnknownFieldSet other) { + if (other != getDefaultInstance()) { + for (final Map.Entry<Integer, Field> entry : other.fields.entrySet()) { + mergeField(entry.getKey(), entry.getValue()); + } + } + return this; + } + + /** + * Add a field to the {@code UnknownFieldSet}. If a field with the same + * number already exists, the two are merged. + */ + public Builder mergeField(final int number, final Field field) { + if (number == 0) { + throw new IllegalArgumentException("Zero is not a valid field number."); + } + if (hasField(number)) { + getFieldBuilder(number).mergeFrom(field); + } else { + // Optimization: We could call getFieldBuilder(number).mergeFrom(field) + // in this case, but that would create a copy of the Field object. + // We'd rather reuse the one passed to us, so call addField() instead. + addField(number, field); + } + return this; + } + + /** + * Convenience method for merging a new field containing a single varint + * value. This is used in particular when an unknown enum value is + * encountered. + */ + public Builder mergeVarintField(final int number, final int value) { + if (number == 0) { + throw new IllegalArgumentException("Zero is not a valid field number."); + } + getFieldBuilder(number).addVarint(value); + return this; + } + + /** Check if the given field number is present in the set. */ + public boolean hasField(final int number) { + if (number == 0) { + throw new IllegalArgumentException("Zero is not a valid field number."); + } + return number == lastFieldNumber || fields.containsKey(number); + } + + /** + * Add a field to the {@code UnknownFieldSet}. If a field with the same + * number already exists, it is removed. + */ + public Builder addField(final int number, final Field field) { + if (number == 0) { + throw new IllegalArgumentException("Zero is not a valid field number."); + } + if (lastField != null && lastFieldNumber == number) { + // Discard this. + lastField = null; + lastFieldNumber = 0; + } + if (fields.isEmpty()) { + fields = new TreeMap<Integer,Field>(); + } + fields.put(number, field); + return this; + } + + /** + * Get all present {@code Field}s as an immutable {@code Map}. If more + * fields are added, the changes may or may not be reflected in this map. + */ + public Map<Integer, Field> asMap() { + getFieldBuilder(0); // Force lastField to be built. + return Collections.unmodifiableMap(fields); + } + + /** + * Parse an entire message from {@code input} and merge its fields into + * this set. + */ + public Builder mergeFrom(final CodedInputStream input) throws IOException { + while (true) { + final int tag = input.readTag(); + if (tag == 0 || !mergeFieldFrom(tag, input)) { + break; + } + } + return this; + } + + /** + * Parse a single field from {@code input} and merge it into this set. + * @param tag The field's tag number, which was already parsed. + * @return {@code false} if the tag is an engroup tag. + */ + public boolean mergeFieldFrom(final int tag, final CodedInputStream input) + throws IOException { + final int number = WireFormat.getTagFieldNumber(tag); + switch (WireFormat.getTagWireType(tag)) { + case WireFormat.WIRETYPE_VARINT: + getFieldBuilder(number).addVarint(input.readInt64()); + return true; + case WireFormat.WIRETYPE_FIXED64: + getFieldBuilder(number).addFixed64(input.readFixed64()); + return true; + case WireFormat.WIRETYPE_LENGTH_DELIMITED: + getFieldBuilder(number).addLengthDelimited(input.readBytes()); + return true; + case WireFormat.WIRETYPE_START_GROUP: + final Builder subBuilder = newBuilder(); + input.readGroup(number, subBuilder, + ExtensionRegistry.getEmptyRegistry()); + getFieldBuilder(number).addGroup(subBuilder.build()); + return true; + case WireFormat.WIRETYPE_END_GROUP: + return false; + case WireFormat.WIRETYPE_FIXED32: + getFieldBuilder(number).addFixed32(input.readFixed32()); + return true; + default: + throw InvalidProtocolBufferException.invalidWireType(); + } + } + + /** + * Parse {@code data} as an {@code UnknownFieldSet} and merge it with the + * set being built. This is just a small wrapper around + * {@link #mergeFrom(CodedInputStream)}. + */ + public Builder mergeFrom(final ByteString data) + throws InvalidProtocolBufferException { + try { + final CodedInputStream input = data.newCodedInput(); + mergeFrom(input); + input.checkLastTagWas(0); + return this; + } catch (final InvalidProtocolBufferException e) { + throw e; + } catch (final IOException e) { + throw new RuntimeException( + "Reading from a ByteString threw an IOException (should " + + "never happen).", e); + } + } + + /** + * Parse {@code data} as an {@code UnknownFieldSet} and merge it with the + * set being built. This is just a small wrapper around + * {@link #mergeFrom(CodedInputStream)}. + */ + public Builder mergeFrom(final byte[] data) + throws InvalidProtocolBufferException { + try { + final CodedInputStream input = CodedInputStream.newInstance(data); + mergeFrom(input); + input.checkLastTagWas(0); + return this; + } catch (final InvalidProtocolBufferException e) { + throw e; + } catch (final IOException e) { + throw new RuntimeException( + "Reading from a byte array threw an IOException (should " + + "never happen).", e); + } + } + + /** + * Parse an {@code UnknownFieldSet} from {@code input} and merge it with the + * set being built. This is just a small wrapper around + * {@link #mergeFrom(CodedInputStream)}. + */ + public Builder mergeFrom(final InputStream input) throws IOException { + final CodedInputStream codedInput = CodedInputStream.newInstance(input); + mergeFrom(codedInput); + codedInput.checkLastTagWas(0); + return this; + } + + public Builder mergeDelimitedFrom(InputStream input) + throws IOException { + final int size = CodedInputStream.readRawVarint32(input); + final InputStream limitedInput = + new AbstractMessage.Builder.LimitedInputStream(input, size); + return mergeFrom(limitedInput, null); + } + + public Builder mergeDelimitedFrom( + InputStream input, + ExtensionRegistryLite extensionRegistry) throws IOException { + // UnknownFieldSet has no extensions. + return mergeFrom(input); + } + + public Builder mergeFrom( + CodedInputStream input, + ExtensionRegistryLite extensionRegistry) throws IOException { + // UnknownFieldSet has no extensions. + return mergeFrom(input); + } + + public Builder mergeFrom( + ByteString data, + ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + // UnknownFieldSet has no extensions. + return mergeFrom(data); + } + + public Builder mergeFrom(byte[] data, int off, int len) + throws InvalidProtocolBufferException { + try { + final CodedInputStream input = + CodedInputStream.newInstance(data, off, len); + mergeFrom(input); + input.checkLastTagWas(0); + return this; + } catch (InvalidProtocolBufferException e) { + throw e; + } catch (IOException e) { + throw new RuntimeException( + "Reading from a byte array threw an IOException (should " + + "never happen).", e); + } + } + + public Builder mergeFrom( + byte[] data, + ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + // UnknownFieldSet has no extensions. + return mergeFrom(data); + } + + public Builder mergeFrom( + byte[] data, int off, int len, + ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + // UnknownFieldSet has no extensions. + return mergeFrom(data, off, len); + } + + public Builder mergeFrom( + InputStream input, + ExtensionRegistryLite extensionRegistry) throws IOException { + // UnknownFieldSet has no extensions. + return mergeFrom(input); + } + + public boolean isInitialized() { + // UnknownFieldSets do not have required fields, so they are always + // initialized. + return true; + } + } + + /** + * Represents a single field in an {@code UnknownFieldSet}. + * + * <p>A {@code Field} consists of five lists of values. The lists correspond + * to the five "wire types" used in the protocol buffer binary format. + * The wire type of each field can be determined from the encoded form alone, + * without knowing the field's declared type. So, we are able to parse + * unknown values at least this far and separate them. Normally, only one + * of the five lists will contain any values, since it is impossible to + * define a valid message type that declares two different types for the + * same field number. However, the code is designed to allow for the case + * where the same unknown field number is encountered using multiple different + * wire types. + * + * <p>{@code Field} is an immutable class. To construct one, you must use a + * {@link Builder}. + * + * @see UnknownFieldSet + */ + public static final class Field { + private Field() {} + + /** Construct a new {@link Builder}. */ + public static Builder newBuilder() { + return Builder.create(); + } + + /** + * Construct a new {@link Builder} and initialize it to a copy of + * {@code copyFrom}. + */ + public static Builder newBuilder(final Field copyFrom) { + return newBuilder().mergeFrom(copyFrom); + } + + /** Get an empty {@code Field}. */ + public static Field getDefaultInstance() { + return fieldDefaultInstance; + } + private static final Field fieldDefaultInstance = newBuilder().build(); + + /** Get the list of varint values for this field. */ + public List<Long> getVarintList() { return varint; } + + /** Get the list of fixed32 values for this field. */ + public List<Integer> getFixed32List() { return fixed32; } + + /** Get the list of fixed64 values for this field. */ + public List<Long> getFixed64List() { return fixed64; } + + /** Get the list of length-delimited values for this field. */ + public List<ByteString> getLengthDelimitedList() { return lengthDelimited; } + + /** + * Get the list of embedded group values for this field. These are + * represented using {@link UnknownFieldSet}s rather than {@link Message}s + * since the group's type is presumably unknown. + */ + public List<UnknownFieldSet> getGroupList() { return group; } + + @Override + public boolean equals(final Object other) { + if (this == other) { + return true; + } + if (!(other instanceof Field)) { + return false; + } + return Arrays.equals(getIdentityArray(), + ((Field) other).getIdentityArray()); + } + + @Override + public int hashCode() { + return Arrays.hashCode(getIdentityArray()); + } + + /** + * Returns the array of objects to be used to uniquely identify this + * {@link Field} instance. + */ + private Object[] getIdentityArray() { + return new Object[] { + varint, + fixed32, + fixed64, + lengthDelimited, + group}; + } + + /** + * Serializes the field, including field number, and writes it to + * {@code output}. + */ + public void writeTo(final int fieldNumber, final CodedOutputStream output) + throws IOException { + for (final long value : varint) { + output.writeUInt64(fieldNumber, value); + } + for (final int value : fixed32) { + output.writeFixed32(fieldNumber, value); + } + for (final long value : fixed64) { + output.writeFixed64(fieldNumber, value); + } + for (final ByteString value : lengthDelimited) { + output.writeBytes(fieldNumber, value); + } + for (final UnknownFieldSet value : group) { + output.writeGroup(fieldNumber, value); + } + } + + /** + * Get the number of bytes required to encode this field, including field + * number. + */ + public int getSerializedSize(final int fieldNumber) { + int result = 0; + for (final long value : varint) { + result += CodedOutputStream.computeUInt64Size(fieldNumber, value); + } + for (final int value : fixed32) { + result += CodedOutputStream.computeFixed32Size(fieldNumber, value); + } + for (final long value : fixed64) { + result += CodedOutputStream.computeFixed64Size(fieldNumber, value); + } + for (final ByteString value : lengthDelimited) { + result += CodedOutputStream.computeBytesSize(fieldNumber, value); + } + for (final UnknownFieldSet value : group) { + result += CodedOutputStream.computeGroupSize(fieldNumber, value); + } + return result; + } + + /** + * Serializes the field, including field number, and writes it to + * {@code output}, using {@code MessageSet} wire format. + */ + public void writeAsMessageSetExtensionTo( + final int fieldNumber, + final CodedOutputStream output) + throws IOException { + for (final ByteString value : lengthDelimited) { + output.writeRawMessageSetExtension(fieldNumber, value); + } + } + + /** + * Get the number of bytes required to encode this field, including field + * number, using {@code MessageSet} wire format. + */ + public int getSerializedSizeAsMessageSetExtension(final int fieldNumber) { + int result = 0; + for (final ByteString value : lengthDelimited) { + result += CodedOutputStream.computeRawMessageSetExtensionSize( + fieldNumber, value); + } + return result; + } + + private List<Long> varint; + private List<Integer> fixed32; + private List<Long> fixed64; + private List<ByteString> lengthDelimited; + private List<UnknownFieldSet> group; + + /** + * Used to build a {@link Field} within an {@link UnknownFieldSet}. + * + * <p>Use {@link Field#newBuilder()} to construct a {@code Builder}. + */ + public static final class Builder { + // This constructor should never be called directly (except from 'create'). + private Builder() {} + + private static Builder create() { + Builder builder = new Builder(); + builder.result = new Field(); + return builder; + } + + private Field result; + + /** + * Build the field. After {@code build()} has been called, the + * {@code Builder} is no longer usable. Calling any other method will + * result in undefined behavior and can cause a + * {@code NullPointerException} to be thrown. + */ + public Field build() { + if (result.varint == null) { + result.varint = Collections.emptyList(); + } else { + result.varint = Collections.unmodifiableList(result.varint); + } + if (result.fixed32 == null) { + result.fixed32 = Collections.emptyList(); + } else { + result.fixed32 = Collections.unmodifiableList(result.fixed32); + } + if (result.fixed64 == null) { + result.fixed64 = Collections.emptyList(); + } else { + result.fixed64 = Collections.unmodifiableList(result.fixed64); + } + if (result.lengthDelimited == null) { + result.lengthDelimited = Collections.emptyList(); + } else { + result.lengthDelimited = + Collections.unmodifiableList(result.lengthDelimited); + } + if (result.group == null) { + result.group = Collections.emptyList(); + } else { + result.group = Collections.unmodifiableList(result.group); + } + + final Field returnMe = result; + result = null; + return returnMe; + } + + /** Discard the field's contents. */ + public Builder clear() { + result = new Field(); + return this; + } + + /** + * Merge the values in {@code other} into this field. For each list + * of values, {@code other}'s values are append to the ones in this + * field. + */ + public Builder mergeFrom(final Field other) { + if (!other.varint.isEmpty()) { + if (result.varint == null) { + result.varint = new ArrayList<Long>(); + } + result.varint.addAll(other.varint); + } + if (!other.fixed32.isEmpty()) { + if (result.fixed32 == null) { + result.fixed32 = new ArrayList<Integer>(); + } + result.fixed32.addAll(other.fixed32); + } + if (!other.fixed64.isEmpty()) { + if (result.fixed64 == null) { + result.fixed64 = new ArrayList<Long>(); + } + result.fixed64.addAll(other.fixed64); + } + if (!other.lengthDelimited.isEmpty()) { + if (result.lengthDelimited == null) { + result.lengthDelimited = new ArrayList<ByteString>(); + } + result.lengthDelimited.addAll(other.lengthDelimited); + } + if (!other.group.isEmpty()) { + if (result.group == null) { + result.group = new ArrayList<UnknownFieldSet>(); + } + result.group.addAll(other.group); + } + return this; + } + + /** Add a varint value. */ + public Builder addVarint(final long value) { + if (result.varint == null) { + result.varint = new ArrayList<Long>(); + } + result.varint.add(value); + return this; + } + + /** Add a fixed32 value. */ + public Builder addFixed32(final int value) { + if (result.fixed32 == null) { + result.fixed32 = new ArrayList<Integer>(); + } + result.fixed32.add(value); + return this; + } + + /** Add a fixed64 value. */ + public Builder addFixed64(final long value) { + if (result.fixed64 == null) { + result.fixed64 = new ArrayList<Long>(); + } + result.fixed64.add(value); + return this; + } + + /** Add a length-delimited value. */ + public Builder addLengthDelimited(final ByteString value) { + if (result.lengthDelimited == null) { + result.lengthDelimited = new ArrayList<ByteString>(); + } + result.lengthDelimited.add(value); + return this; + } + + /** Add an embedded group. */ + public Builder addGroup(final UnknownFieldSet value) { + if (result.group == null) { + result.group = new ArrayList<UnknownFieldSet>(); + } + result.group.add(value); + return this; + } + } + } +} |