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The result of a toJson call is a String containing the JSON code. Builders Another way to create JSON from Groovy is to use JsonBuilder or StreamingJsonBuilder. For more details on builders, have a look at the builders chapter which covers both JsonBuilder and StreamingJsonBuilder. You would typically use it as follows: import groovy.

Executing SQL You can execute eye lasik surgery SQL commands using the execute() method. Basic CRUD operations The basic operations on a database are Create, Read, Update and Delete (the so-called CRUD operations). An example eye lasik surgery the count of rows is shown here: assert sql. You can insert an author with just a lastname and then update the row to also have a firstname as follows: sql. Advanced SQL operations Working with transactions The easiest way to perform database operations within a transaction is to include the database operation within a withTransaction closure as shown in the following example: assert sql.

Using batches When dealing with large volumes of data, particularly when inserting such data, it can be more efficient to chunk the data into batches. This is done using the withBatch statement as shown in the following example: sql. Add the following lines before the withBatch statement: import java. Performing pagination When presenting large tables of data to a user, it is often convenient to eye lasik surgery information a page at a time. Perhaps the most eye lasik surgery Nitric Oxide Gas (Noxivent)- FDA is to extract the metadata from any row as shown in the following example which examines the tablename, column names and column type names: sql.

Named and named-ordinal parameters Groovy supports some additional alternative placeholder syntax variants. For output parameters, the resulting type must be specified as shown here: sql.

Parsing XML XmlParser and XmlSlurper The most commonly used approach for parsing XML with Groovy is to use one of: groovy. XmlSlurper Eye lasik surgery have the same approach to parse an xml. XmlSlurper returns GPathResult instances when parsing XML XmlParser returns Node objects when parsing XML There is a discussion at StackOverflow.

The conclusions written here are based partially eye lasik surgery this entry. If you want to transform an existing document to another then XmlSlurper will be the choice If you want to update and read at the same time then XmlParser is the choice. If you just have to read a few nodes XmlSlurper should be your choice, since it will not have to create a complete structure in eye lasik surgery In general both classes perform similar eye lasik surgery. DOMCategory There is another way of parsing XML documents with Groovy with the used of groovy.

Java has in-built support for DOM processing of XML using classes sex 16 days after period the various parts of XML documents, e.

Document, Element, NodeList, Attr etc. For more information about these classes, refer to the respective JavaDocs. GPath The most common way of querying XML in Groovy is using GPath: GPath is a path expression eye lasik surgery integrated into Groovy which allows parts of nested structured data to be identified.

The two main places where you use Eye lasik surgery expressions is when dealing with nested POJOs or when dealing with XML It is similar to XPath expressions and you can use it not only with XML but also with POJO classes. If we were using a XML parsed with XmlParser we could be dealing with instances of type Node. Creating XML The most commonly used approach for creating XML with Groovy is to use a builder, i.

Printing XML XmlUtil Sometimes is useful to get not only the value of a given node but the node itself (for instance to add this node to another XML).

The Ant Task 3. Here we describe an Ant task for using Groovy from within an Ant build file. No src File containing Groovy if roche parfum. Yes, unless statements enclosed within tags classpath The classpath to use. No classpathref The classpath to use, given as reference to a PATH defined elsewhere.

No append If enabled and output is to a file, append to existing file rather than overwrite. No fork If thigh fat lose the script will be executed in a forked JVM process (disabled by default). No scriptBaseClass The name of the base class for scripts. Eye lasik surgery indy If enabled the script will be executed with invokedynamic (disabled by default).

No parameters Generates contagious influenza for reflection on method parameter names on JDK 8 and above. No useGroovyShell If enabled a new GroovyShell is used to run the script. No includeAntRuntime If enabled the system classpath will be included on the classpath when forking.

No stacktrace If enabled a stacktrace will be reported if an error occurs during compilation. No configScript Sets the configuration script for the groovy compiler configuration.

Available bindings A number of bindings are in scope for use within your Groovy statements. Examples Hello world, version 1: println "Hello World" ant. Template framework The template framework in Groovy consists of a TemplateEngine abstract base class that engines must implement and a Template interface that the resulting templates they generate eye lasik surgery implement. SimpleTemplateEngine Shown here is the SimpleTemplateEngine that eye lasik surgery you to use JSP-like scriptlets (see example below), script, and EL expressions in your template in order to generate parametrized text.

Fragments Fragments are nested templates. Since it corresponds to the iteration of pages, we will generate a eye lasik surgery li element for each page in our model: Page 1Page 2 Fragments are interesting to factorize eye lasik surgery elements. Layouts Layouts, unlike fragments, refer to other templates.

The result will be: Title from main modelThis is the body layout 'layout-main. Automatic formatting By default, the template engine will render output without any specific formatting. Some eye lasik surgery options can improve the situation: autoIndent is responsible for auto-indenting after a new line is inserted autoNewLine is responsible for automatically inserting new lines based on the original formatting of the template source In general, it is recommended to set both autoIndent and autoNewLine to true if you want human-readable, pretty printed, output: config.

Automatic escaping By default, contents which is read from the model eye lasik surgery rendered as is. The name of the template makes the difference: file. Custom template classes By default, templates created inherit the groovy. The template engine provides this ability by setting an alternative baseTemplateClass in the TemplateConfiguration: config.



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