From d9f864a13f9216b7ee78a85c53d3184220eb01c3 Mon Sep 17 00:00:00 2001
From: Silvio <silvio@devlet.com.br>
Date: Thu, 15 Jul 2010 18:15:21 -0300
Subject: Moving iterators to their own folder
---
classes/iterators/IsisFieldIterator.php | 79 ++++++++++++++++++++++
classes/iterators/IsisMethodIterator.php | 63 +++++++++++++++++
.../iterators/IsisNormalSubfieldFilterIterator.php | 14 ++++
classes/iterators/IsisRowIterator.php | 58 ++++++++++++++++
classes/iterators/IsisSubfieldIterator.php | 75 ++++++++++++++++++++
classes/iterators/IsisValueIterator.php | 62 +++++++++++++++++
6 files changed, 351 insertions(+)
create mode 100644 classes/iterators/IsisFieldIterator.php
create mode 100644 classes/iterators/IsisMethodIterator.php
create mode 100644 classes/iterators/IsisNormalSubfieldFilterIterator.php
create mode 100644 classes/iterators/IsisRowIterator.php
create mode 100644 classes/iterators/IsisSubfieldIterator.php
create mode 100644 classes/iterators/IsisValueIterator.php
(limited to 'classes/iterators')
diff --git a/classes/iterators/IsisFieldIterator.php b/classes/iterators/IsisFieldIterator.php
new file mode 100644
index 0000000..11ed979
--- /dev/null
+++ b/classes/iterators/IsisFieldIterator.php
@@ -0,0 +1,79 @@
+<?php
+
+/**
+ * Isis field iterator. Iterates over all field values for
+ * each result row.
+ */
+class IsisFieldIterator implements Iterator
+{
+ private $valueset;
+ private $row = 0;
+ private $rows = 0;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ *
+ * @param $field
+ * Field to iterate over.
+ */
+ public function __construct($class, $field) {
+ $this->rows = $class->getRows($field);
+ $this->valueset = $class->getValues($field);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->row = 0;
+ $this->value = 0;
+ }
+
+ /**
+ * Return the key of the current element.
+ */
+ function key() {
+ return $this->row;
+ }
+
+ /**
+ * Return the current element.
+ */
+ function current() {
+ return $this->valueset[$this->row]['field'];
+ }
+
+ /**
+ * Move forward to next element.
+ */
+ function next() {
+ do {
+ ++$this->row;
+ }
+ while ($this->current_null() && $this->has_more_rows());
+ }
+
+ /**
+ * Check if there are more rows.
+ */
+ function has_more_rows() {
+ return $this->row <= $this->rows;
+ }
+
+ /**
+ * Check if the current value is null.
+ */
+ function current_null() {
+ return $this->current() == NULL;
+ }
+
+ /**
+ * Check if there is a current element after calls to rewind() or next().
+ */
+ function valid() {
+ return $this->has_more_rows() && !$this->current_null();
+ }
+}
diff --git a/classes/iterators/IsisMethodIterator.php b/classes/iterators/IsisMethodIterator.php
new file mode 100644
index 0000000..4e5871c
--- /dev/null
+++ b/classes/iterators/IsisMethodIterator.php
@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * Iterates over all callable methods for database mapping.
+ */
+class IsisMethodIterator implements Iterator
+{
+ private $total = 0;
+ private $class;
+ private $keys;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ */
+ public function __construct($class) {
+ $this->class = $class;
+ $this->total = count($class->fields);
+ $this->keys = array_keys($class->fields);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->position = 0;
+ }
+
+ /**
+ * Return the key of the current element.
+ */
+ function key() {
+ $type = $this->class->getMapType($this->current());
+ return $this->class->methodName($type);
+ }
+
+ /**
+ * Return the current element.
+ */
+ function current() {
+ return $this->class->fields[$this->keys[$this->position]];
+ }
+
+ /**
+ * Move forward to next element. The method should be callable, otherwise
+ * we move to the next position.
+ */
+ function next() {
+ do {
+ ++$this->position;
+ }
+ while (!is_callable(array($this->class, $this->key())) && $this->valid());
+ }
+
+ /**
+ * Check if there is a current element after calls to rewind() or next().
+ */
+ function valid() {
+ return $this->position <= $this->total;
+ }
+}
diff --git a/classes/iterators/IsisNormalSubfieldFilterIterator.php b/classes/iterators/IsisNormalSubfieldFilterIterator.php
new file mode 100644
index 0000000..98494a6
--- /dev/null
+++ b/classes/iterators/IsisNormalSubfieldFilterIterator.php
@@ -0,0 +1,14 @@
+<?php
+
+/**
+ * Isis normal subfield iterator. Filter out special subfields.
+ */
+class IsisNormalSubfieldFilterIterator extends FilterIterator {
+ public function accept()
+ {
+ $field = $this->getInnerIterator()->field;
+ $class = $this->getInnerIterator()->class;
+ $subfield = $this->getInnerIterator()->current();
+ return !$class->specialSubfield($field, $subfield);
+ }
+}
diff --git a/classes/iterators/IsisRowIterator.php b/classes/iterators/IsisRowIterator.php
new file mode 100644
index 0000000..739db22
--- /dev/null
+++ b/classes/iterators/IsisRowIterator.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * Iterates over all rows from a field result.
+ */
+class IsisRowIterator implements Iterator
+{
+ private $row = 0;
+ private $rows = 0;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ *
+ * @param $field
+ * Field to iterate over.
+ */
+ public function __construct($class, $field) {
+ $this->rows = $class->getRows($field);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->row = 0;
+ }
+
+ /**
+ * Return the key of the current element.
+ */
+ function key() {
+ return $this->row;
+ }
+
+ /**
+ * Return the current element.
+ */
+ function current() {
+ return $this->row;
+ }
+
+ /**
+ * Move forward to next element.
+ */
+ function next() {
+ ++$this->row;
+ }
+
+ /**
+ * Check if there is a current element after calls to rewind() or next().
+ */
+ function valid() {
+ return $this->row <= $this->rows;
+ }
+}
diff --git a/classes/iterators/IsisSubfieldIterator.php b/classes/iterators/IsisSubfieldIterator.php
new file mode 100644
index 0000000..36d3d06
--- /dev/null
+++ b/classes/iterators/IsisSubfieldIterator.php
@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * Isis subfield iterator. Iterates over all subfields for
+ * each result row.
+ */
+class IsisSubfieldIterator implements Iterator
+{
+ private $keys;
+ private $fieldset;
+ private $row = 0;
+ private $rows = 0;
+ private $subfield = 0;
+ private $subfields = 0;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ *
+ * @param $field
+ * Field to iterate over.
+ */
+ public function __construct($class, $field) {
+ $this->class = $class;
+ $this->field = $field;
+ $this->rows = $class->getRows($field);
+ $this->fieldset = $class->getSubfieldList($field);
+ $this->keys = array_keys($this->fieldset);
+ $this->subfields = count($this->keys);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->row = 0;
+ $this->subfield = 0;
+ }
+
+ /**
+ * Return the key of the current element.
+ */
+ function key() {
+ return $this->row;
+ }
+
+ /**
+ * Return the current element.
+ */
+ function current() {
+ return $this->fieldset[$this->keys[$this->subfield]];
+ }
+
+ /**
+ * Move forward to next element.
+ */
+ function next() {
+ if ($this->subfield >= $this->subfields) {
+ $this->subfield = 0;
+ ++$this->row;
+ }
+ else {
+ ++$this->subfield;
+ }
+ }
+
+ /**
+ * Check if there is a current element after calls to rewind() or next().
+ */
+ function valid() {
+ return $this->row <= $this->rows;
+ }
+}
diff --git a/classes/iterators/IsisValueIterator.php b/classes/iterators/IsisValueIterator.php
new file mode 100644
index 0000000..f10125d
--- /dev/null
+++ b/classes/iterators/IsisValueIterator.php
@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * Isis value iterator. Iterates over all values for
+ * each result row.
+ */
+class IsisValueIterator implements Iterator
+{
+ private $valueset;
+ private $row = 0;
+ private $rows = 0;
+
+ /**
+ * Constructor.
+ *
+ * @param $class
+ * Instance of IsisConnector or child class.
+ *
+ * @param $field
+ * Field to iterate over.
+ */
+ public function __construct($class, $field) {
+ $this->rows = $class->getRows($field);
+ $this->valueset = $class->getValues($field);
+ }
+
+ /**
+ * Rewind the Iterator to the first element.
+ */
+ function rewind() {
+ $this->row = 0;
+ $this->value = 0;
+ }
+
+ /**
+ * Return the key of the current element.
+ */
+ function key() {
+ return $this->row;
+ }
+
+ /**
+ * Return the current element.
+ */
+ function current() {
+ return $this->valueset[$this->row];
+ }
+
+ /**
+ * Move forward to next element.
+ */
+ function next() {
+ ++$this->row;
+ }
+
+ /**
+ * Check if there is a current element after calls to rewind() or next().
+ */
+ function valid() {
+ return $this->row <= $this->rows;
+ }
+}
--
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