Spring/spring-framework
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fixed TemplateParserContext documentation (SPR-7059)

Browse Source
This commit is contained in:
Juergen Hoeller
2010-04-01 10:59:58 +00:00
parent ee686188b7
commit 52179d8bfb
2 changed files with 10 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
spring-framework-reference/src/expressions.xml
View File

@@ -1015,28 +1015,28 @@ List placesOfBirth = (List)parser.parseExpression("Members.![placeOfBirth.city]"
<para>Expression templates allow a mixing of literal text with one or
more evaluation blocks. Each evaluation block is delimited with prefix
and suffix characters that you can define, a common choice is to use
<literal>${} </literal>as the delimiters. For example,</para>
<literal>#{ }</literal> as the delimiters. For example,</para>
<programlisting language="java">String randomPhrase =
parser.parseExpression("random number is ${T(java.lang.Math).random()}",
new TemplatedParserContext()).getValue(String.class);
parser.parseExpression("random number is #{T(java.lang.Math).random()}",
new TemplateParserContext()).getValue(String.class);
// evaluates to "random number is 0.7038186818312008"</programlisting>
<para>The string is evaluated by concatenating the literal text 'random
number is ' with the result of evaluating the expression inside the ${}
number is ' with the result of evaluating the expression inside the #{ }
delimiter, in this case the result of calling that random() method. The
second argument to the method <literal>parseExpression()</literal> is of
the type <interfacename>ParserContext</interfacename>. The
<interfacename>ParserContext</interfacename> interface is used to
influence how the expression is parsed in order to support the
expression templating functionality. The definition of
<classname>TemplatedParserContext</classname> is shown below.</para>
<classname>TemplateParserContext</classname> is shown below.</para>
<programlisting language="java">public class TemplatedParserContext implements ParserContext {
<programlisting language="java">public class TemplateParserContext implements ParserContext {
public String getExpressionPrefix() {
return "${";
return "#{";
}
public String getExpressionSuffix() {