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## org.modeshape.repository.sequencer
Class SequencerPathExpression

    java.lang.Object
      org.modeshape.repository.sequencer.SequencerPathExpression

All Implemented Interfaces:
  Serializable

    @Immutable
    public class SequencerPathExpression

extends Object
implements Serializable

An expression that defines a selection of some change in the repository that signals a sequencing operation should be run, and the location where the sequencing output should be placed. Sequencer path expressions are used within the `sequencer configurations` and used to determine whether information in the repository needs to be sequenced.

A simple example is the following:

         /a/b/c@title => /d/e/f

which means that a sequencer (that uses this expression in its configuration) should be run any time there is a new or modified `title` property on the `/a/b/c` node, and that the output of the sequencing should be placed at `/d/e/f`.

See Also:
  Serialized Form

Nested Class Summary
`static class` | `SequencerPathExpression.Matcher`

Field Summary
`protected static String` | `DEFAULT_OUTPUT_EXPRESSION`

Constructor Summary
`protected` | `SequencerPathExpression(PathExpression selectExpression, String outputExpression)`

Method Summary
`static SequencerPathExpression` | `compile(String expression)` Compile the supplied expression and return the resulting SequencerPathExpression instance.
`boolean` | `equals(Object obj)`
`String` | `getOutputExpression()`
`String` | `getSelectExpression()`
`int` | `hashCode()`
`SequencerPathExpression.Matcher` | `matcher(String absolutePath)` Obtain a Matcher that can be used to convert the supplied absolute path (with repository name and workspace name) into an output repository, and output workspace name, and output path.
`String` | `toString()`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### DEFAULT_OUTPUT_EXPRESSION

    protected static final String DEFAULT_OUTPUT_EXPRESSION

See Also:
  Constant Field Values

Constructor Detail

### SequencerPathExpression

    protected SequencerPathExpression(PathExpression selectExpression,
                                      String outputExpression)
                               throws InvalidSequencerPathExpression

Throws:
  `InvalidSequencerPathExpression`

Method Detail

### compile

    public static final SequencerPathExpression compile(String expression)
                                                 throws InvalidSequencerPathExpression

  Compile the supplied expression and return the resulting SequencerPathExpression instance.

  Parameters:
    `expression` - the expression
  Returns:
    the path expression; never null
  Throws:
    `IllegalArgumentException` - if the expression is null
    `InvalidSequencerPathExpression` - if the expression is blank or is not a valid expression

### getSelectExpression

    public String getSelectExpression()

  Returns:
    selectExpression

### getOutputExpression

    public String getOutputExpression()

  Returns:
    outputExpression

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

### equals

    public boolean equals(Object obj)

  Overrides:
    `equals` in class `Object`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### matcher

    public SequencerPathExpression.Matcher matcher(String absolutePath)

  Obtain a Matcher that can be used to convert the supplied absolute path (with repository name and workspace name) into an output repository, and output workspace name, and output path.

  Parameters:
    `absolutePath` - the path, of the form `{repoName}:{workspaceName}:{absPath}`
  Returns:
    the matcher; never null

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