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PATH: home / letacommog / letaweb / admin / classes / htmlpurifier / library / HTMLPurifier

<?php

/**
 * Generic property list implementation.
 */
class HTMLPurifier_PropertyList
{
    /**
     * Internal data-structure for properties.
     */
    protected $data = array();

/**
     * Parent plist.
     */
    protected $parent;

protected $cache;

public function __construct($parent = null)
    {
        $this->parent = $parent;
    }

/**
     * Recursively retrieves the value for a key.
     */
    public function get($name)
    {
        if ($this->has($name)) {
            return $this->data[$name];
        }
        // possible performance bottleneck, convert to iterative if necessary
        if ($this->parent) {
            return $this->parent->get($name);
        }
        throw new HTMLPurifier_Exception("Key '$name' not found");
    }

/**
     * Sets the value of a key, for this plist.
     */
    public function set($name, $value)
    {
        $this->data[$name] = $value;
    }

/**
     * Returns true if a given key exists.
     */
    public function has($name)
    {
        return array_key_exists($name, $this->data);
    }

/**
     * Resets a value to the value of it's parent, usually the default. If
     * no value is specified, the entire plist is reset.
     */
    public function reset($name = null)
    {
        if ($name == null) {
            $this->data = array();
        } else {
            unset($this->data[$name]);
        }
    }

/**
     * Squashes this property list and all of its property lists into a single
     * array, and returns the array. This value is cached by default.
     *
     * @param $force If true, ignores the cache and regenerates the array.
     */
    public function squash($force = false)
    {
        if ($this->cache !== null && !$force) {
            return $this->cache;
        }
        if ($this->parent) {
            return $this->cache = array_merge($this->parent->squash($force), $this->data);
        } else {
            return $this->cache = $this->data;
        }
    }

/**
     * Returns the parent plist.
     */
    public function getParent()
    {
        return $this->parent;
    }

/**
     * Sets the parent plist.
     */
    public function setParent($plist)
    {
        $this->parent = $plist;
    }
}

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