Table::__construct() - Code Metrics - OriHoch/tableschema-php - Measure and Improve Code Quality continuously with Scrutinizer

Table::__construct() B
last analyzed 2017-11-29 20:35 UTC

↳ Parent: Table

Complexity

Conditions	5
Paths	12

Size

Total Lines	22
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	5
eloc	15
nc	12
nop	3
dl	0
loc	22
rs	8.6737
c	0
b	0
f	0

<?php

namespace frictionlessdata\tableschema;

use frictionlessdata\tableschema\DataSources\CsvDataSource;
use frictionlessdata\tableschema\Exceptions\DataSourceException;

/**
 * represents a data source which validates against a table schema
 * provides interfaces for validating the data and iterating over it
 * casts all values to their native values according to the table schema.
 */
class Table implements \Iterator
{
    public $csvDialect;

    /**
     * @param DataSources\DataSourceInterface $dataSource
     * @param Schema                          $schema
     * @param object                          $csvDialect
     *
     * @throws Exceptions\DataSourceException
     */
    public function __construct($dataSource, $schema = null, $csvDialect = null)
    {
        $this->csvDialect = new CsvDialect($csvDialect);
        if (!is_a($dataSource, 'frictionlessdata\\tableschema\\DataSources\\BaseDataSource')) {
            // TODO: more advanced data source detection
            $dataSource = new CsvDataSource($dataSource);
        }
        if (is_a($dataSource, 'frictionlessdata\\tableschema\\DataSources\\CsvDataSource')) {
            $dataSource->setCsvDialect($this->csvDialect);
        }
        $this->dataSource = $dataSource;
        if (!is_a($schema, 'frictionlessdata\\tableschema\\Schema')) {
            if ($schema) {
                $schema = new Schema($schema);
            } else {
                $schema = new InferSchema();
            }
        }
        $this->schema = $schema;
        $this->dataSource->open();
        $this->uniqueFieldValues = [];
    }

    /**
     * @param DataSources\DataSourceInterface $dataSource
     * @param Schema                          $schema
     * @param int                             $numPeekRows
     *
     * @return array of validation errors
     */
    public static function validate($dataSource, $schema, $numPeekRows = 10, $csvDialect = null)
    {
        try {
            $table = new static($dataSource, $schema, $csvDialect);
        } catch (Exceptions\DataSourceException $e) {
            return [new SchemaValidationError(SchemaValidationError::LOAD_FAILED, $e->getMessage())];
        }
        if ($numPeekRows > 0) {
            $i = 0;
            try {
                foreach ($table as $row) {
                    if (++$i > $numPeekRows) {
                        break;
                    }
                }
            } catch (Exceptions\DataSourceException $e) {
function fx() {
    try {
        doSomething();
        return true;
    }
    catch (\Exception $e) {
        return false;
    }

    return false;
}
                // general error in getting the next row from the data source
                return [new SchemaValidationError(SchemaValidationError::ROW_VALIDATION, [
                    'row' => $i,
                    'error' => $e->getMessage(),
                ])];
            } catch (Exceptions\FieldValidationException $e) {
                // validation error in one of the fields
                return array_map(function ($validationError) use ($i) {
                    return new SchemaValidationError(SchemaValidationError::ROW_FIELD_VALIDATION, [
                        'row' => $i + 1,
                        'field' => $validationError->extraDetails['field'],
                        'error' => $validationError->extraDetails['error'],
                        'value' => $validationError->extraDetails['value'],
                    ]);
                }, $e->validationErrors);
            }
        }

        return [];
    }

    public function schema($numPeekRows = 10)
    {
        $this->ensureInferredSchema($numPeekRows);

        return $this->schema;
    }

    public function headers($numPeekRows = 10)
    {
        $this->ensureInferredSchema($numPeekRows);

        return array_keys($this->schema->fields());
    }

    public function read()
    {
        $rows = [];
        foreach ($this as $row) {
            $rows[] = $row;
        }

        return $rows;
    }

    public function save($outputDataSource)
    {
        return $this->dataSource->save($outputDataSource);
    }

    /**
     * called on each iteration to get the next row
     * does validation and casting on the row.
     *
     * @return mixed[]
     *
     * @throws Exceptions\FieldValidationException
     * @throws Exceptions\DataSourceException
     */
    public function current()
    {
        if (count($this->castRows) > 0) {
            $row = array_shift($this->castRows);
        } else {
            $row = $this->schema->castRow($this->dataSource->getNextLine());
            foreach ($this->schema->fields() as $field) {
                if ($field->unique()) {
                    if (!array_key_exists($field->name(), $this->uniqueFieldValues)) {
                        $this->uniqueFieldValues[$field->name()] = [];
                    }
                    $value = $row[$field->name()];
                    if (in_array($value, $this->uniqueFieldValues[$field->name()])) {
                        throw new DataSourceException('field must be unique', $this->currentLine);
                    } else {
                        $this->uniqueFieldValues[$field->name()][] = $value;
                    }
                }
            }
        }

        return $row;
    }

    // not interesting, standard iterator functions
    // to simplify we prevent rewinding - so you can only iterate once
    public function __destruct()
    {
        $this->dataSource->close();
    }

    public function rewind()
    {
        if ($this->currentLine == 0) {
            $this->currentLine = 1;
        } elseif (count($this->castRows) == 0) {
            $this->currentLine = 1;
            $this->dataSource->open();
        }
    }

    public function key()
    {
        return $this->currentLine - count($this->castRows);
    }

    public function next()
    {
        if (count($this->castRows) == 0) {
            ++$this->currentLine;
        }
    }

    public function valid()
    {
        return count($this->castRows) > 0 || !$this->dataSource->isEof();
    }

    protected $currentLine = 0;
    protected $dataSource;
    protected $schema;
    protected $uniqueFieldValues;
    protected $castRows = [];

    protected function isInferSchema()
    {
        return is_a($this->schema, 'frictionlessdata\\tableschema\\InferSchema');
    }

    protected function ensureInferredSchema($numPeekRows = 10)
    {
        if ($this->isInferSchema() && count($this->schema->fields()) == 0) {
            // need to fetch some rows first
            if ($numPeekRows > 0) {
                $i = 0;
                foreach ($this as $row) {
                    if (++$i > $numPeekRows) {
                        break;
                    }
                }
                // these rows will be returned by next current() call
                $this->castRows = $this->schema->lock();
abstract class User
{
    /** @return string */
    abstract public function getPassword();
}

class MyUser extends User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
            }
        }
    }
}


1			<?php
2
3			namespace frictionlessdata\tableschema;
4
5			use frictionlessdata\tableschema\DataSources\CsvDataSource;
6			use frictionlessdata\tableschema\Exceptions\DataSourceException;
7
8			/**
9			* represents a data source which validates against a table schema
10			* provides interfaces for validating the data and iterating over it
11			* casts all values to their native values according to the table schema.
12			*/
13			class Table implements \Iterator
14			{
15			public $csvDialect;
16
17			/**
18			* @param DataSources\DataSourceInterface $dataSource
19			* @param Schema $schema
20			* @param object $csvDialect
21			*
22			* @throws Exceptions\DataSourceException
23			*/
24			public function __construct($dataSource, $schema = null, $csvDialect = null)
25			{
26			$this->csvDialect = new CsvDialect($csvDialect);
27			if (!is_a($dataSource, 'frictionlessdata\\tableschema\\DataSources\\BaseDataSource')) {
28			// TODO: more advanced data source detection
29			$dataSource = new CsvDataSource($dataSource);
30			}
31			if (is_a($dataSource, 'frictionlessdata\\tableschema\\DataSources\\CsvDataSource')) {
32			$dataSource->setCsvDialect($this->csvDialect);
33			}
34			$this->dataSource = $dataSource;
35			if (!is_a($schema, 'frictionlessdata\\tableschema\\Schema')) {
36			if ($schema) {
37			$schema = new Schema($schema);
38			} else {
39			$schema = new InferSchema();
40			}
41			}
42			$this->schema = $schema;
43			$this->dataSource->open();
44			$this->uniqueFieldValues = [];
45			}
46
47			/**
48			* @param DataSources\DataSourceInterface $dataSource
49			* @param Schema $schema
50			* @param int $numPeekRows
51			*
52			* @return array of validation errors
53			*/
54			public static function validate($dataSource, $schema, $numPeekRows = 10, $csvDialect = null)
55			{
56			try {
57			$table = new static($dataSource, $schema, $csvDialect);
58			} catch (Exceptions\DataSourceException $e) {
59			return [new SchemaValidationError(SchemaValidationError::LOAD_FAILED, $e->getMessage())];
60			}
61			if ($numPeekRows > 0) {
62			$i = 0;
63			try {
64			foreach ($table as $row) {
65			if (++$i > $numPeekRows) {
66			break;
67			}
68			}
69			} catch (Exceptions\DataSourceException $e) {
			0 ignored issues – show Unused Code introduced 2017-05-04 05:59 UTC by Report Bug Copy Issue Report `catch (\frictionlessdata... $e->getMessage()))); }` does not seem to be reachable. This check looks for unreachable code. It uses sophisticated control flow analysis techniques to find statements which will never be executed. Unreachable code is most often the result of `return`, `die` or `exit` statements that have been added for debug purposes. function fx() { try { doSomething(); return true; } catch (\Exception $e) { return false; } return false; } In the above example, the last `return false` will never be executed, because a return statement has already been met in every possible execution path. Loading history...
70			// general error in getting the next row from the data source
71			return [new SchemaValidationError(SchemaValidationError::ROW_VALIDATION, [
72			'row' => $i,
73			'error' => $e->getMessage(),
74			])];
75			} catch (Exceptions\FieldValidationException $e) {
76			// validation error in one of the fields
77			return array_map(function ($validationError) use ($i) {
78			return new SchemaValidationError(SchemaValidationError::ROW_FIELD_VALIDATION, [
79			'row' => $i + 1,
80			'field' => $validationError->extraDetails['field'],
81			'error' => $validationError->extraDetails['error'],
82			'value' => $validationError->extraDetails['value'],
83			]);
84			}, $e->validationErrors);
85			}
86			}
87
88			return [];
89			}
90
91			public function schema($numPeekRows = 10)
92			{
93			$this->ensureInferredSchema($numPeekRows);
94
95			return $this->schema;
96			}
97
98			public function headers($numPeekRows = 10)
99			{
100			$this->ensureInferredSchema($numPeekRows);
101
102			return array_keys($this->schema->fields());
103			}
104
105			public function read()
106			{
107			$rows = [];
108			foreach ($this as $row) {
109			$rows[] = $row;
110			}
111
112			return $rows;
113			}
114
115			public function save($outputDataSource)
116			{
117			return $this->dataSource->save($outputDataSource);
118			}
119
120			/**
121			* called on each iteration to get the next row
122			* does validation and casting on the row.
123			*
124			* @return mixed[]
125			*
126			* @throws Exceptions\FieldValidationException
127			* @throws Exceptions\DataSourceException
128			*/
129			public function current()
130			{
131			if (count($this->castRows) > 0) {
132			$row = array_shift($this->castRows);
133			} else {
134			$row = $this->schema->castRow($this->dataSource->getNextLine());
135			foreach ($this->schema->fields() as $field) {
136			if ($field->unique()) {
137			if (!array_key_exists($field->name(), $this->uniqueFieldValues)) {
138			$this->uniqueFieldValues[$field->name()] = [];
139			}
140			$value = $row[$field->name()];
141			if (in_array($value, $this->uniqueFieldValues[$field->name()])) {
142			throw new DataSourceException('field must be unique', $this->currentLine);
143			} else {
144			$this->uniqueFieldValues[$field->name()][] = $value;
145			}
146			}
147			}
148			}
149
150			return $row;
151			}
152
153			// not interesting, standard iterator functions
154			// to simplify we prevent rewinding - so you can only iterate once
155			public function __destruct()
156			{
157			$this->dataSource->close();
158			}
159
160			public function rewind()
161			{
162			if ($this->currentLine == 0) {
163			$this->currentLine = 1;
164			} elseif (count($this->castRows) == 0) {
165			$this->currentLine = 1;
166			$this->dataSource->open();
167			}
168			}
169
170			public function key()
171			{
172			return $this->currentLine - count($this->castRows);
173			}
174
175			public function next()
176			{
177			if (count($this->castRows) == 0) {
178			++$this->currentLine;
179			}
180			}
181
182			public function valid()
183			{
184			return count($this->castRows) > 0 \|\| !$this->dataSource->isEof();
185			}
186
187			protected $currentLine = 0;
188			protected $dataSource;
189			protected $schema;
190			protected $uniqueFieldValues;
191			protected $castRows = [];
192
193			protected function isInferSchema()
194			{
195			return is_a($this->schema, 'frictionlessdata\\tableschema\\InferSchema');
196			}
197
198			protected function ensureInferredSchema($numPeekRows = 10)
199			{
200			if ($this->isInferSchema() && count($this->schema->fields()) == 0) {
201			// need to fetch some rows first
202			if ($numPeekRows > 0) {
203			$i = 0;
204			foreach ($this as $row) {
205			if (++$i > $numPeekRows) {
206			break;
207			}
208			}
209			// these rows will be returned by next current() call
210			$this->castRows = $this->schema->lock();
			0 ignored issues – show Bug introduced 2017-07-13 06:55 UTC by Report Bug Copy Issue Report It seems like you code against a specific sub-type and not the parent class `frictionlessdata\tableschema\Schema` as the method `lock()` does only exist in the following sub-classes of `frictionlessdata\tableschema\Schema`: `frictionlessdata\tableschema\InferSchema`. Maybe you want to `instanceof` check for one of these explicitly? Let’s take a look at an example: abstract class User { /** @return string / abstract public function getPassword(); } class MyUser extends User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different sub-classes of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the parent class: abstract class User { /** @return string / abstract public function getPassword(); /* @return string */ abstract public function getDisplayName(); } Loading history...
211			}
212			}
213			}
214			}
215

OriHoch / tableschema-php

Table::__construct() B last analyzed 2017-11-29 20:35 UTC

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Table::__construct() B
last analyzed 2017-11-29 20:35 UTC