Aqua Help

Search templates, modifiers, and script constraints

When you construct a template for a structural search you are basically writing a script. To simplify your scripting process, Aqua offers you a list of predefined search templates that you can use as prototypes for your search template.

Search templates dialog

On how to access the list of the existing search and replace templates, see the structural search and replace section.

A valid search or replacement template represents one of the following supported languages constructs:

  • Expression, for example "John" + " " + "Doe"

  • Statement, or sequence of statements, for example document.getElementById("demo").innerHTML = "Hello Dolly.";

  • Class designator, for example class Engine implements IEngine

  • Line or block comments, for example /** Created in Aqua */.

In search templates, the following simplifications can be used:

  • Method body can be omitted.

  • Short class names (instead of fully qualified names) are used in the templates and constraint fields.

  • Using class $Class$ as a template results in finding anonymous classes as well.

  • Templates for comments and documentation comments should contain variables and constructs with correct comment and JavaDoc syntax.

Each search or replace template consists of variables $variable_name$ to which you can add a condition (modifier) to narrow your search results. Modifiers depend on a variable in your search template.

A search template preview

Count modifier

The Count modifier specifies a number of occurrences.

For example, in the search template, for variable specify min and max numbers in the Count modifier field. To set the unlimited maximum count, provide an empty value in the modifier field.

Count modifier

Aqua adds [0,∞] to the variable and searches for the specified range of numbers.

Reference modifier

The Reference modifier lets you reference some other search template in the variable.

The reference will always contain the name of a preconfigured or saved template, and you can use auto-completion to fill out this field.

For example, for the $MethodCalls$ variable, type annotated methods in the Reference modifier field.

Reference modifier

Aqua searches for method calls to methods with annotations.

Type modifier

The Type modifier adds a type of the value or expression that is expected for the specified variable.

For example, for the $expression$ variable, type int in the Type modifier field.

Find tool window the results for boxed expression

Aqua searches for places where boxing is performed for an integer.

Text filter

The Text modifier checks the variable against regular expressions or plain text.

For example, you can search for classes that implement a certain interface. In this case, add a fully qualified name of the interface in the Text modifier. Also, select the Within type hierarchy option, so the classes indirectly implementing Cloneable will also be included in the search. If this option is not selected, only the classes that directly implement Cloneable will be included.

Text modifier

Script constraints

The Script modifier adds Groovy script constraints to the search template. Script constraints are used when you search for certain language constructs.

For example, constructors with the specified number of parameters, or members with the specified visibility modifiers.

All variables used in a template can be accessed from script constraints. When you add a script constraint to your variable, Aqua matches it against the PSI tree, this variable is in fact a node in the PSI tree.

Let's say, you have a variable that matches a method, a toString() method. Then this variable is actually a PsiMethod node. Retrieving variable.parent will produce a PsiClass node, and so forth. variable.text then will give you the entire text of the method. If you just need the name of the method, you can use variable.name.

In another case the structural search and replace variable may match some expression, for example, a reference to a variable, a PsiReferenceExpression. An expression has no name of course, but retrieving the entire text of the expression, will give you the name of the variable to which it is referring.

You can check the syntax of script constraints that are used in the following existing templates:

  • sample method invocation with a constant parameter

  • classes

  • classes with parameterless constructors

  • static fields that are not final

  • interface that is not implemented or extended

  • fields/variables read

  • fields/variables with given name template updated

Existing Templates dialog
Last modified: 26 May 2024