Android Open Source - NexusData Store Cache Node

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCT...

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Java Source Code

package com.github.dkharrat.nexusdata.core;
// w  ww  .  ja  va  2  s  . c o m
import java.util.HashMap;
import java.util.Map;

/**
 * Represents the data cache for a single record in the persistent store. It's used by the framework to retrieve and
 * store the data of the corresponding managed object from and to the persistent store.
 *
 * Internally, a StoreCacheNode is simply a key/value store to get or set value of individual properties.
 * A value can contain references to other ObjectIDs if the property is a relationship.
 */
public class StoreCacheNode {
    private final ObjectID id;
    private Map<String,Object> properties = new HashMap<String,Object>();

    /**
     * Creates a new StoreCacheNode that's associated with the specified ObjectID
     *
     * @param id the objectID that this node will represent
     */
    public StoreCacheNode(ObjectID id) {
        this.id = id;
    }

    /**
     * Returns the ObjectID represented by this StoreCacheNode.
     *
     * @return the ObjectID represented by this StoreCacheNode
     */
    public ObjectID getID() {
        return id;
    }

    /**
     * Sets the value for the given property. For regular attributes, this will be supported objects like {@link String},
     * {@link Integer}, {@link java.util.Date}, {@link Enum}, etc. For a to-one relationship, the value must be the
     * {@link ObjectID} of the related object. For a to-many relationship, the value must be the a {@code Set<ObjectID>}
     * containing the ObjectIDs of the related objects.
     *
     * @param name  the property name to set
     * @param value the value of the property
     */
    public void setProperty(String name, Object value) {
        properties.put(name, value);
    }

    /**
     * Returns the value of the given property. For regular attributes, this will be supported objects like {@link String},
     * {@link Integer}, {@link java.util.Date}, {@link Enum}, etc. For a to-one relationship, the value must be the
     * {@link ObjectID} of the related object. For a to-many relationship, the value must be the a {@code Set<ObjectID>}
     * containing the ObjectIDs of the related objects.
     *
     * @param name  the property name to get
     *
     * @return the value of the specified property
     */
    public Object getProperty(String name) {
        return properties.get(name);
    }

    /**
     * Returns true if this node is storing a value for the specified property, or false otherwise.
     *
     * @param name  the property name to check
     *
     * @return true if this node is storing a value for the specified property, or false otherwise
     */
    public boolean hasProperty(String name) {
        return properties.containsKey(name);
    }

    /**
     * Returns the key/value store for all the properties in this node.
     *
     * @return the key/value store for all the properties in this node
     */
    public Map<String,Object> getProperties() {
        return properties;
    }
}

Java Source Code List