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JsonReader (Gson 2.3.1 API)
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com.google.gson.stream</FONT>
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Class JsonReader</H2>
<PRE>
<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.gson.stream.JsonReader</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>JsonReader</B><DT>extends <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></DL>
</PRE>
<P>
Reads a JSON (<a href="http://www.ietf.org/rfc/rfc4627.txt">RFC 4627</a>)
encoded value as a stream of tokens. This stream includes both literal
values (strings, numbers, booleans, and nulls) as well as the begin and
end delimiters of objects and arrays. The tokens are traversed in
depth-first order, the same order that they appear in the JSON document.
Within JSON objects, name/value pairs are represented by a single token.
<h3>Parsing JSON</h3>
To create a recursive descent parser for your own JSON streams, first create
an entry point method that creates a <code>JsonReader</code>.
<p>Next, create handler methods for each structure in your JSON text. You'll
need a method for each object type and for each array type.
<ul>
<li>Within <strong>array handling</strong> methods, first call <A HREF="../../../../com/google/gson/stream/JsonReader.html#beginArray()"><CODE>beginArray()</CODE></A> to consume the array's opening bracket. Then create a
while loop that accumulates values, terminating when <A HREF="../../../../com/google/gson/stream/JsonReader.html#hasNext()"><CODE>hasNext()</CODE></A>
is false. Finally, read the array's closing bracket by calling <A HREF="../../../../com/google/gson/stream/JsonReader.html#endArray()"><CODE>endArray()</CODE></A>.
<li>Within <strong>object handling</strong> methods, first call <A HREF="../../../../com/google/gson/stream/JsonReader.html#beginObject()"><CODE>beginObject()</CODE></A> to consume the object's opening brace. Then create a
while loop that assigns values to local variables based on their name.
This loop should terminate when <A HREF="../../../../com/google/gson/stream/JsonReader.html#hasNext()"><CODE>hasNext()</CODE></A> is false. Finally,
read the object's closing brace by calling <A HREF="../../../../com/google/gson/stream/JsonReader.html#endObject()"><CODE>endObject()</CODE></A>.
</ul>
<p>When a nested object or array is encountered, delegate to the
corresponding handler method.
<p>When an unknown name is encountered, strict parsers should fail with an
exception. Lenient parsers should call <A HREF="../../../../com/google/gson/stream/JsonReader.html#skipValue()"><CODE>skipValue()</CODE></A> to recursively
skip the value's nested tokens, which may otherwise conflict.
<p>If a value may be null, you should first check using <A HREF="../../../../com/google/gson/stream/JsonReader.html#peek()"><CODE>peek()</CODE></A>.
Null literals can be consumed using either <A HREF="../../../../com/google/gson/stream/JsonReader.html#nextNull()"><CODE>nextNull()</CODE></A> or <A HREF="../../../../com/google/gson/stream/JsonReader.html#skipValue()"><CODE>skipValue()</CODE></A>.
<h3>Example</h3>
Suppose we'd like to parse a stream of messages such as the following: <pre> <code>[
{
"id": 912345678901,
"text": "How do I read a JSON stream in Java?",
"geo": null,
"user": {
"name": "json_newb",
"followers_count": 41
}
},
{
"id": 912345678902,
"text": "@json_newb just use JsonReader!",
"geo": [50.454722, -104.606667],
"user": {
"name": "jesse",
"followers_count": 2
}
}
]</code></pre>
This code implements the parser for the above structure: <pre> <code>public List<Message> readJsonStream(InputStream in) throws IOException {
JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
try {
return readMessagesArray(reader);
} finally {
reader.close();
}
}
public List<Message> readMessagesArray(JsonReader reader) throws IOException {
List<Message> messages = new ArrayList<Message>();
reader.beginArray();
while (reader.hasNext()) {
messages.add(readMessage(reader));
}
reader.endArray();
return messages;
}
public Message readMessage(JsonReader reader) throws IOException {
long id = -1;
String text = null;
User user = null;
List<Double> geo = null;
reader.beginObject();
while (reader.hasNext()) {
String name = reader.nextName();
if (name.equals("id")) {
id = reader.nextLong();
} else if (name.equals("text")) {
text = reader.nextString();
} else if (name.equals("geo") && reader.peek() != JsonToken.NULL) {
geo = readDoublesArray(reader);
} else if (name.equals("user")) {
user = readUser(reader);
} else {
reader.skipValue();
}
}
reader.endObject();
return new Message(id, text, user, geo);
}
public List<Double> readDoublesArray(JsonReader reader) throws IOException {
List<Double> doubles = new ArrayList<Double>();
reader.beginArray();
while (reader.hasNext()) {
doubles.add(reader.nextDouble());
}
reader.endArray();
return doubles;
}
public User readUser(JsonReader reader) throws IOException {
String username = null;
int followersCount = -1;
reader.beginObject();
while (reader.hasNext()) {
String name = reader.nextName();
if (name.equals("name")) {
username = reader.nextString();
} else if (name.equals("followers_count")) {
followersCount = reader.nextInt();
} else {
reader.skipValue();
}
}
reader.endObject();
return new User(username, followersCount);
}</code></pre>
<h3>Number Handling</h3>
This reader permits numeric values to be read as strings and string values to
be read as numbers. For example, both elements of the JSON array <code>[1, "1"]</code> may be read using either <A HREF="../../../../com/google/gson/stream/JsonReader.html#nextInt()"><CODE>nextInt()</CODE></A> or <A HREF="../../../../com/google/gson/stream/JsonReader.html#nextString()"><CODE>nextString()</CODE></A>.
This behavior is intended to prevent lossy numeric conversions: double is
JavaScript's only numeric type and very large values like <code>9007199254740993</code> cannot be represented exactly on that platform. To minimize
precision loss, extremely large values should be written and read as strings
in JSON.
<a name="nonexecuteprefix"/><h3>Non-Execute Prefix</h3>
Web servers that serve private data using JSON may be vulnerable to <a
href="http://en.wikipedia.org/wiki/JSON#Cross-site_request_forgery">Cross-site
request forgery</a> attacks. In such an attack, a malicious site gains access
to a private JSON file by executing it with an HTML <code><script></code> tag.
<p>Prefixing JSON files with <code>")]}'\n"</code> makes them non-executable
by <code><script></code> tags, disarming the attack. Since the prefix is malformed
JSON, strict parsing fails when it is encountered. This class permits the
non-execute prefix when <A HREF="../../../../com/google/gson/stream/JsonReader.html#setLenient(boolean)"><CODE>lenient parsing</CODE></A> is
enabled.
<p>Each <code>JsonReader</code> may be used to read a single JSON stream. Instances
of this class are not thread safe.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.6</DD>
<DT><B>Author:</B></DT>
<DD>Jesse Wilson</DD>
</DL>
<HR>
<P>
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<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#JsonReader(java.io.Reader)">JsonReader</A></B>(<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Reader.html?is-external=true" title="class or interface in java.io">Reader</A> in)</CODE>
<BR>
Creates a new instance that reads a JSON-encoded stream from <code>in</code>.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#beginArray()">beginArray</A></B>()</CODE>
<BR>
Consumes the next token from the JSON stream and asserts that it is the
beginning of a new array.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#beginObject()">beginObject</A></B>()</CODE>
<BR>
Consumes the next token from the JSON stream and asserts that it is the
beginning of a new object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#close()">close</A></B>()</CODE>
<BR>
Closes this JSON reader and the underlying <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Reader.html?is-external=true" title="class or interface in java.io"><CODE>Reader</CODE></A>.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#endArray()">endArray</A></B>()</CODE>
<BR>
Consumes the next token from the JSON stream and asserts that it is the
end of the current array.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#endObject()">endObject</A></B>()</CODE>
<BR>
Consumes the next token from the JSON stream and asserts that it is the
end of the current object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#getPath()">getPath</A></B>()</CODE>
<BR>
Returns a <a href="http://goessner.net/articles/JsonPath/">JsonPath</a> to
the current location in the JSON value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#hasNext()">hasNext</A></B>()</CODE>
<BR>
Returns true if the current array or object has another element.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#isLenient()">isLenient</A></B>()</CODE>
<BR>
Returns true if this parser is liberal in what it accepts.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextBoolean()">nextBoolean</A></B>()</CODE>
<BR>
Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#BOOLEAN"><CODE>boolean</CODE></A> value of the next token,
consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextDouble()">nextDouble</A></B>()</CODE>
<BR>
Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>double</CODE></A> value of the next token,
consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextInt()">nextInt</A></B>()</CODE>
<BR>
Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>int</CODE></A> value of the next token,
consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextLong()">nextLong</A></B>()</CODE>
<BR>
Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>long</CODE></A> value of the next token,
consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextName()">nextName</A></B>()</CODE>
<BR>
Returns the next token, a <A HREF="../../../../com/google/gson/stream/JsonToken.html#NAME"><CODE>property name</CODE></A>, and
consumes it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextNull()">nextNull</A></B>()</CODE>
<BR>
Consumes the next token from the JSON stream and asserts that it is a
literal null.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#nextString()">nextString</A></B>()</CODE>
<BR>
Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#STRING"><CODE>string</CODE></A> value of the next token,
consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../com/google/gson/stream/JsonToken.html" title="enum in com.google.gson.stream">JsonToken</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#peek()">peek</A></B>()</CODE>
<BR>
Returns the type of the next token without consuming it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#setLenient(boolean)">setLenient</A></B>(boolean lenient)</CODE>
<BR>
Configure this parser to be be liberal in what it accepts.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#skipValue()">skipValue</A></B>()</CODE>
<BR>
Skips the next value recursively.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/gson/stream/JsonReader.html#toString()">toString</A></B>()</CODE>
<BR>
</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="JsonReader(java.io.Reader)"><!-- --></A><H3>
JsonReader</H3>
<PRE>
public <B>JsonReader</B>(<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Reader.html?is-external=true" title="class or interface in java.io">Reader</A> in)</PRE>
<DL>
<DD>Creates a new instance that reads a JSON-encoded stream from <code>in</code>.
<P>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="setLenient(boolean)"><!-- --></A><H3>
setLenient</H3>
<PRE>
public final void <B>setLenient</B>(boolean lenient)</PRE>
<DL>
<DD>Configure this parser to be be liberal in what it accepts. By default,
this parser is strict and only accepts JSON as specified by <a
href="http://www.ietf.org/rfc/rfc4627.txt">RFC 4627</a>. Setting the
parser to lenient causes it to ignore the following syntax errors:
<ul>
<li>Streams that start with the <a href="#nonexecuteprefix">non-execute
prefix</a>, <code>")]}'\n"</code>.
<li>Streams that include multiple top-level values. With strict parsing,
each stream must contain exactly one top-level value.
<li>Top-level values of any type. With strict parsing, the top-level
value must be an object or an array.
<li>Numbers may be <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Double.html?is-external=true#isNaN()" title="class or interface in java.lang"><CODE>NaNs</CODE></A> or <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Double.html?is-external=true#isInfinite()" title="class or interface in java.lang"><CODE>infinities</CODE></A>.
<li>End of line comments starting with <code>//</code> or <code>#</code> and
ending with a newline character.
<li>C-style comments starting with <code>/*</code> and ending with
<code>*</code><code>/</code>. Such comments may not be nested.
<li>Names that are unquoted or <code>'single quoted'</code>.
<li>Strings that are unquoted or <code>'single quoted'</code>.
<li>Array elements separated by <code>;</code> instead of <code>,</code>.
<li>Unnecessary array separators. These are interpreted as if null
was the omitted value.
<li>Names and values separated by <code>=</code> or <code>=></code> instead of
<code>:</code>.
<li>Name/value pairs separated by <code>;</code> instead of <code>,</code>.
</ul>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isLenient()"><!-- --></A><H3>
isLenient</H3>
<PRE>
public final boolean <B>isLenient</B>()</PRE>
<DL>
<DD>Returns true if this parser is liberal in what it accepts.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="beginArray()"><!-- --></A><H3>
beginArray</H3>
<PRE>
public void <B>beginArray</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Consumes the next token from the JSON stream and asserts that it is the
beginning of a new array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="endArray()"><!-- --></A><H3>
endArray</H3>
<PRE>
public void <B>endArray</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Consumes the next token from the JSON stream and asserts that it is the
end of the current array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="beginObject()"><!-- --></A><H3>
beginObject</H3>
<PRE>
public void <B>beginObject</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Consumes the next token from the JSON stream and asserts that it is the
beginning of a new object.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="endObject()"><!-- --></A><H3>
endObject</H3>
<PRE>
public void <B>endObject</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Consumes the next token from the JSON stream and asserts that it is the
end of the current object.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
public boolean <B>hasNext</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns true if the current array or object has another element.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="peek()"><!-- --></A><H3>
peek</H3>
<PRE>
public <A HREF="../../../../com/google/gson/stream/JsonToken.html" title="enum in com.google.gson.stream">JsonToken</A> <B>peek</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the type of the next token without consuming it.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextName()"><!-- --></A><H3>
nextName</H3>
<PRE>
public <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>nextName</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the next token, a <A HREF="../../../../com/google/gson/stream/JsonToken.html#NAME"><CODE>property name</CODE></A>, and
consumes it.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE> - if the next token in the stream is not a property
name.</DL>
</DD>
</DL>
<HR>
<A NAME="nextString()"><!-- --></A><H3>
nextString</H3>
<PRE>
public <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>nextString</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#STRING"><CODE>string</CODE></A> value of the next token,
consuming it. If the next token is a number, this method will return its
string form.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not a string or if
this reader is closed.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextBoolean()"><!-- --></A><H3>
nextBoolean</H3>
<PRE>
public boolean <B>nextBoolean</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#BOOLEAN"><CODE>boolean</CODE></A> value of the next token,
consuming it.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not a boolean or if
this reader is closed.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextNull()"><!-- --></A><H3>
nextNull</H3>
<PRE>
public void <B>nextNull</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Consumes the next token from the JSON stream and asserts that it is a
literal null.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not null or if this
reader is closed.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextDouble()"><!-- --></A><H3>
nextDouble</H3>
<PRE>
public double <B>nextDouble</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>double</CODE></A> value of the next token,
consuming it. If the next token is a string, this method will attempt to
parse it as a double using <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Double.html?is-external=true#parseDouble(java.lang.String)" title="class or interface in java.lang"><CODE>Double.parseDouble(String)</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not a literal value.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang">NumberFormatException</A></CODE> - if the next literal value cannot be parsed
as a double, or is non-finite.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextLong()"><!-- --></A><H3>
nextLong</H3>
<PRE>
public long <B>nextLong</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>long</CODE></A> value of the next token,
consuming it. If the next token is a string, this method will attempt to
parse it as a long. If the next token's numeric value cannot be exactly
represented by a Java <code>long</code>, this method throws.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not a literal value.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang">NumberFormatException</A></CODE> - if the next literal value cannot be parsed
as a number, or exactly represented as a long.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="nextInt()"><!-- --></A><H3>
nextInt</H3>
<PRE>
public int <B>nextInt</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Returns the <A HREF="../../../../com/google/gson/stream/JsonToken.html#NUMBER"><CODE>int</CODE></A> value of the next token,
consuming it. If the next token is a string, this method will attempt to
parse it as an int. If the next token's numeric value cannot be exactly
represented by a Java <code>int</code>, this method throws.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the next token is not a literal value.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/NumberFormatException.html?is-external=true" title="class or interface in java.lang">NumberFormatException</A></CODE> - if the next literal value cannot be parsed
as a number, or exactly represented as an int.
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Closes this JSON reader and the underlying <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Reader.html?is-external=true" title="class or interface in java.io"><CODE>Reader</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Closeable.html?is-external=true#close()" title="class or interface in java.io">close</A></CODE> in interface <CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="skipValue()"><!-- --></A><H3>
skipValue</H3>
<PRE>
public void <B>skipValue</B>()
throws <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Skips the next value recursively. If it is an object or array, all nested
elements are skipped. This method is intended for use when the JSON token
stream contains unrecognized or unhandled values.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>
<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A></CODE> in class <CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getPath()"><!-- --></A><H3>
getPath</H3>
<PRE>
public <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getPath</B>()</PRE>
<DL>
<DD>Returns a <a href="http://goessner.net/articles/JsonPath/">JsonPath</a> to
the current location in the JSON value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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