jsondiscoverer

Class JsonComposer

java.lang.Object

jsondiscoverer.JsonComposer

public class JsonComposer
extends java.lang.Object

This class composes a set of ecore models representing JSON-based apis.

Although some of the calculations done here could be applied in a more-general process of composing any ecore model, the current implementation is coupled to the data/structure of the ecore models discovered by the JsonAdvancedDiscoverer.

In the context of the JSON discoverer, the JsonComposer is used to discover the metamodel out of a set of JSON-based APIs

Author:

Javier Canovas (me@jlcanovas.es)

Field Summary

Fields

Modifier and Type	Field and Description
private static double	ATTRIBUTE_MATCHING_THRESHOLD Threshold to consider when two attributes.
private static double	CLASS_MATCHING_THRESHOLD Threshold to consider when two metamodel classes are similar.
private static java.util.logging.Logger	LOGGER Used to log all the activity
private java.util.List<JsonSourceSet>	sourceSets The set of JsonSourceSets to use in the discovery process

Constructor Summary

Constructors

Constructor and Description
JsonComposer(java.util.List<JsonSourceSet> sourceSets) Constructs a new JsonComposer with a list of JsonSourceSets

Method Summary

Modifier and Type	Method and Description
org.eclipse.emf.ecore.EPackage	compose() Compose the sourceSet's received in the constructor and returns the composed metamodel.
org.eclipse.emf.ecore.EPackage	compose(java.io.File resultPath) Compose the sourceSet's received in the constructor and returns the composed metamodel.
private boolean	isSimilar(org.eclipse.emf.ecore.EClass sourceEClass, org.eclipse.emf.ecore.EClass targetEClass) Compares if two metamodel classes (as EClass elements) are similar.
private boolean	nameIsSimilar(java.util.List<java.lang.String> sourceNames, java.util.List<java.lang.String> targetNames) Compares two list of String and returns true when two similar Strings are found.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

sourceSets

private java.util.List<JsonSourceSet> sourceSets

The set of JsonSourceSets to use in the discovery process

LOGGER

private static final java.util.logging.Logger LOGGER

Used to log all the activity

ATTRIBUTE_MATCHING_THRESHOLD

private static final double ATTRIBUTE_MATCHING_THRESHOLD

Threshold to consider when two attributes.

To calculate the ratio, the number of matching attributes in the two metamodel classes are compared. Thus, two metamodel classes with matching attributes will give a ratio of 1

See Also:

Constant Field Values

CLASS_MATCHING_THRESHOLD

private static final double CLASS_MATCHING_THRESHOLD

Threshold to consider when two metamodel classes are similar.

To calculate the ratio, the number of matching attributes/refereces in the two metamodel classes are compared. Thus, two metamodel classes with matching attributes/references will give a ratio of 1

See Also:

Constant Field Values

Constructor Detail

JsonComposer

public JsonComposer(java.util.List<JsonSourceSet> sourceSets)

Constructs a new JsonComposer with a list of JsonSourceSets

Parameters:

sourceSets - A list of JsonSourceSets

Method Detail

compose

public org.eclipse.emf.ecore.EPackage compose(java.io.File resultPath)
                                       throws java.io.FileNotFoundException

Compose the sourceSet's received in the constructor and returns the composed metamodel. Serializes the resulting metamodel.

Parameters:

resultPath - The path where the resulting metamodel will be stored

Returns:

The resulting metamodel as EPackage

Throws:

java.io.FileNotFoundException - There is no file to read from

compose

public org.eclipse.emf.ecore.EPackage compose()

Compose the sourceSet's received in the constructor and returns the composed metamodel.

Returns:

The composed metamodel

isSimilar

private boolean isSimilar(org.eclipse.emf.ecore.EClass sourceEClass,
                          org.eclipse.emf.ecore.EClass targetEClass)

Compares if two metamodel classes (as EClass elements) are similar.

The comparison takes into consideration the names of attributes/refrences and counts the ones that are similar. The ratio of similar vs. different is calculated and if it higher that ATTRIBUTE_MATCHING_THRESHOLD, the two classes are considered similar

Parameters:

sourceEClass - The source EClass

targetEClass - The target EClass

Returns:

Boolean indicating if both classes are similar

nameIsSimilar

private boolean nameIsSimilar(java.util.List<java.lang.String> sourceNames,
                              java.util.List<java.lang.String> targetNames)

Compares two list of String and returns true when two similar Strings are found.

Parameters:

sourceNames - Source list of String

targetNames - Target list of String

Returns:

True if at least two equal Strings (one in each list) are found.