PropertyExtraction (Hydra Java API)

java.lang.Object
- com.gdblab.pathAlgebra.expressions.PropertyExtraction

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<PropertyExtraction>
```
public class PropertyExtraction
extends java.lang.Object
implements java.io.Serializable, java.lang.Comparable<PropertyExtraction>
```
Extract properties from path elements

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`Optional<java.lang.String>`	`alias`
`static Name`	`ALIAS`	Name of the `com.gdblab.pathAlgebra.expressions.PropertyExtraction.alias` field.
`PropertySource`	`source`
`static Name`	`SOURCE`	Name of the `com.gdblab.pathAlgebra.expressions.PropertyExtraction.source` field.
`static Name`	`TYPE_`	Name of the `com.gdblab.pathAlgebra.expressions.PropertyExtraction` type.

Constructor Summary

Constructors
Constructor Description

PropertyExtraction(Optional<java.lang.String> alias, PropertySource source)
Constructs an immutable PropertyExtraction.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compareTo(PropertyExtraction other)`
`boolean`	`equals(java.lang.Object other)`
`int`	`hashCode()`
`PropertyExtraction`	`withAlias(Optional<java.lang.String> alias)`	Returns a copy of this `PropertyExtraction` with `alias` replaced.
`PropertyExtraction`	`withSource(PropertySource source)`	Returns a copy of this `PropertyExtraction` with `source` replaced.

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

- Field Detail
  - TYPE_
```
public static final Name TYPE_
```
    Name of the com.gdblab.pathAlgebra.expressions.PropertyExtraction type.
  - ALIAS
```
public static final Name ALIAS
```
    Name of the com.gdblab.pathAlgebra.expressions.PropertyExtraction.alias field.
  - SOURCE
```
public static final Name SOURCE
```
    Name of the com.gdblab.pathAlgebra.expressions.PropertyExtraction.source field.
  - alias
```
public final Optional<java.lang.String> alias
```
  - source
```
public final PropertySource source
```
- Constructor Detail
  - PropertyExtraction
```
public PropertyExtraction(Optional<java.lang.String> alias,
                          PropertySource source)
```
    Constructs an immutable PropertyExtraction.
- Method Detail
  - equals
```
public boolean equals(java.lang.Object other)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - compareTo
```
public int compareTo(PropertyExtraction other)
```
    Specified by:
    
    compareTo in interface java.lang.Comparable<PropertyExtraction>
  - withAlias
```
public PropertyExtraction withAlias(Optional<java.lang.String> alias)
```
    Returns a copy of this PropertyExtraction with alias replaced.
  - withSource
```
public PropertyExtraction withSource(PropertySource source)
```
    Returns a copy of this PropertyExtraction with source replaced.