+++ /dev/null
-/*
- * Copyright (C) 2011 Google Inc.
- *
- * Licensed 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 com.google.gson.internal.bind;
-
-import com.google.gson.JsonArray;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonNull;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonPrimitive;
-import com.google.gson.stream.JsonWriter;
-import java.io.IOException;
-import java.io.Writer;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * This writer creates a JsonElement.
- */
-public final class JsonTreeWriter extends JsonWriter {
- private static final Writer UNWRITABLE_WRITER = new Writer() {
- @Override public void write(char[] buffer, int offset, int counter) {
- throw new AssertionError();
- }
- @Override public void flush() throws IOException {
- throw new AssertionError();
- }
- @Override public void close() throws IOException {
- throw new AssertionError();
- }
- };
- /** Added to the top of the stack when this writer is closed to cause following ops to fail. */
- private static final JsonPrimitive SENTINEL_CLOSED = new JsonPrimitive("closed");
-
- /** The JsonElements and JsonArrays under modification, outermost to innermost. */
- private final List<JsonElement> stack = new ArrayList<JsonElement>();
-
- /** The name for the next JSON object value. If non-null, the top of the stack is a JsonObject. */
- private String pendingName;
-
- /** the JSON element constructed by this writer. */
- private JsonElement product = JsonNull.INSTANCE; // TODO: is this really what we want?;
-
- public JsonTreeWriter() {
- super(UNWRITABLE_WRITER);
- }
-
- /**
- * Returns the top level object produced by this writer.
- */
- public JsonElement get() {
- if (!stack.isEmpty()) {
- throw new IllegalStateException("Expected one JSON element but was " + stack);
- }
- return product;
- }
-
- private JsonElement peek() {
- return stack.get(stack.size() - 1);
- }
-
- private void put(JsonElement value) {
- if (pendingName != null) {
- if (!value.isJsonNull() || getSerializeNulls()) {
- JsonObject object = (JsonObject) peek();
- object.add(pendingName, value);
- }
- pendingName = null;
- } else if (stack.isEmpty()) {
- product = value;
- } else {
- JsonElement element = peek();
- if (element instanceof JsonArray) {
- ((JsonArray) element).add(value);
- } else {
- throw new IllegalStateException();
- }
- }
- }
-
- @Override public JsonWriter beginArray() throws IOException {
- JsonArray array = new JsonArray();
- put(array);
- stack.add(array);
- return this;
- }
-
- @Override public JsonWriter endArray() throws IOException {
- if (stack.isEmpty() || pendingName != null) {
- throw new IllegalStateException();
- }
- JsonElement element = peek();
- if (element instanceof JsonArray) {
- stack.remove(stack.size() - 1);
- return this;
- }
- throw new IllegalStateException();
- }
-
- @Override public JsonWriter beginObject() throws IOException {
- JsonObject object = new JsonObject();
- put(object);
- stack.add(object);
- return this;
- }
-
- @Override public JsonWriter endObject() throws IOException {
- if (stack.isEmpty() || pendingName != null) {
- throw new IllegalStateException();
- }
- JsonElement element = peek();
- if (element instanceof JsonObject) {
- stack.remove(stack.size() - 1);
- return this;
- }
- throw new IllegalStateException();
- }
-
- @Override public JsonWriter name(String name) throws IOException {
- if (stack.isEmpty() || pendingName != null) {
- throw new IllegalStateException();
- }
- JsonElement element = peek();
- if (element instanceof JsonObject) {
- pendingName = name;
- return this;
- }
- throw new IllegalStateException();
- }
-
- @Override public JsonWriter value(String value) throws IOException {
- if (value == null) {
- return nullValue();
- }
- put(new JsonPrimitive(value));
- return this;
- }
-
- @Override public JsonWriter nullValue() throws IOException {
- put(JsonNull.INSTANCE);
- return this;
- }
-
- @Override public JsonWriter value(boolean value) throws IOException {
- put(new JsonPrimitive(value));
- return this;
- }
-
- @Override public JsonWriter value(double value) throws IOException {
- if (!isLenient() && (Double.isNaN(value) || Double.isInfinite(value))) {
- throw new IllegalArgumentException("JSON forbids NaN and infinities: " + value);
- }
- put(new JsonPrimitive(value));
- return this;
- }
-
- @Override public JsonWriter value(long value) throws IOException {
- put(new JsonPrimitive(value));
- return this;
- }
-
- @Override public JsonWriter value(Number value) throws IOException {
- if (value == null) {
- return nullValue();
- }
-
- if (!isLenient()) {
- double d = value.doubleValue();
- if (Double.isNaN(d) || Double.isInfinite(d)) {
- throw new IllegalArgumentException("JSON forbids NaN and infinities: " + value);
- }
- }
-
- put(new JsonPrimitive(value));
- return this;
- }
-
- @Override public void flush() throws IOException {
- }
-
- @Override public void close() throws IOException {
- if (!stack.isEmpty()) {
- throw new IOException("Incomplete document");
- }
- stack.add(SENTINEL_CLOSED);
- }
-}
projects / unical.git / blobdiff