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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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 static com.google.protobuf.Internal.checkNotNull;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Information for the layout of a protobuf message class. This describes all of the fields
* contained within a message.
*/
@ExperimentalApi
@CheckReturnValue
final class StructuralMessageInfo implements MessageInfo {
private final ProtoSyntax syntax;
private final boolean messageSetWireFormat;
private final int[] checkInitialized;
private final FieldInfo[] fields;
private final MessageLite defaultInstance;
/**
* Constructor.
*
* @param checkInitialized fields to check in isInitialized().
* @param fields the set of fields for the message, in field number order.
*/
StructuralMessageInfo(
ProtoSyntax syntax,
boolean messageSetWireFormat,
int[] checkInitialized,
FieldInfo[] fields,
Object defaultInstance) {
this.syntax = syntax;
this.messageSetWireFormat = messageSetWireFormat;
this.checkInitialized = checkInitialized;
this.fields = fields;
this.defaultInstance = (MessageLite) checkNotNull(defaultInstance, "defaultInstance");
}
/** Gets the syntax for the message (e.g. PROTO2, PROTO3). */
@Override
public ProtoSyntax getSyntax() {
return syntax;
}
/** Indicates whether or not the message should be represented with message set wire format. */
@Override
public boolean isMessageSetWireFormat() {
return messageSetWireFormat;
}
/** An array of field numbers that need to be checked for isInitialized(). */
public int[] getCheckInitialized() {
return checkInitialized;
}
/**
* Gets the information for all fields within this message, sorted in ascending order by their
* field number.
*/
public FieldInfo[] getFields() {
return fields;
}
@Override
public MessageLite getDefaultInstance() {
return defaultInstance;
}
/** Helper method for creating a new builder for {@link MessageInfo}. */
public static Builder newBuilder() {
return new Builder();
}
/** Helper method for creating a new builder for {@link MessageInfo}. */
public static Builder newBuilder(int numFields) {
return new Builder(numFields);
}
/** A builder of {@link MessageInfo} instances. */
public static final class Builder {
private final List fields;
private ProtoSyntax syntax;
private boolean wasBuilt;
private boolean messageSetWireFormat;
private int[] checkInitialized = null;
private Object defaultInstance;
public Builder() {
fields = new ArrayList();
}
public Builder(int numFields) {
fields = new ArrayList(numFields);
}
public void withDefaultInstance(Object defaultInstance) {
this.defaultInstance = defaultInstance;
}
public void withSyntax(ProtoSyntax syntax) {
this.syntax = checkNotNull(syntax, "syntax");
}
public void withMessageSetWireFormat(boolean messageSetWireFormat) {
this.messageSetWireFormat = messageSetWireFormat;
}
public void withCheckInitialized(int[] checkInitialized) {
this.checkInitialized = checkInitialized;
}
public void withField(FieldInfo field) {
if (wasBuilt) {
throw new IllegalStateException("Builder can only build once");
}
fields.add(field);
}
public StructuralMessageInfo build() {
if (wasBuilt) {
throw new IllegalStateException("Builder can only build once");
}
if (syntax == null) {
throw new IllegalStateException("Must specify a proto syntax");
}
wasBuilt = true;
Collections.sort(fields);
return new StructuralMessageInfo(
syntax,
messageSetWireFormat,
checkInitialized,
fields.toArray(new FieldInfo[0]),
defaultInstance);
}
}
}
