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author | Tom Powell <zifnab@zifnab06.net> | 2015-10-08 21:40:00 -0700 |
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committer | Tom Powell <zifnab@zifnab06.net> | 2015-10-08 21:40:00 -0700 |
commit | 4bc2ec0628f74bc24c3820951f4ca2c91e516f7a (patch) | |
tree | 3b0061fa2a6be32d1fdab9a63495aacf2bdc705c /gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java | |
parent | ca8ca14e5e1904db81f4f68445b94040293d83e8 (diff) | |
parent | 5d414d68ea79cc01bdd574656099a08228b82aa2 (diff) | |
download | android_external_gson-4bc2ec0628f74bc24c3820951f4ca2c91e516f7a.tar.gz android_external_gson-4bc2ec0628f74bc24c3820951f4ca2c91e516f7a.tar.bz2 android_external_gson-4bc2ec0628f74bc24c3820951f4ca2c91e516f7a.zip |
Merge tag 'gson-2.4' into cm-13.0HEADreplicant-6.0-0004-transitionreplicant-6.0-0004-rc6replicant-6.0-0004-rc5-transitionreplicant-6.0-0004-rc5replicant-6.0-0004-rc4replicant-6.0-0004-rc3replicant-6.0-0004-rc2replicant-6.0-0004-rc1replicant-6.0-0004replicant-6.0-0003replicant-6.0-0002replicant-6.0-0001staging/lineage-15.1stable/cm-13.0-ZNH5Ystable/cm-13.0-ZNH2KBstable/cm-13.0-ZNH2Kstable/cm-13.0-ZNH0Ecm-14.1cm-14.0cm-13.0
[maven-release-plugin] copy for tag gson-2.4
Change-Id: Id89b6397c7e9152eaab6f4753826708330d7373c
Diffstat (limited to 'gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java')
-rw-r--r-- | gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java new file mode 100644 index 00000000..5f9f0395 --- /dev/null +++ b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java @@ -0,0 +1,200 @@ +/* + * 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); + } +} |