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Blueprints property graph implementation for Rexster
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package com.tinkerpop.blueprints.impls.rexster;

import com.tinkerpop.blueprints.CloseableIterable;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Element;
import com.tinkerpop.blueprints.Index;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.util.StringFactory;
import org.codehaus.jettison.json.JSONObject;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
class RexsterIndex implements Index {

    protected final String indexName;
    protected final Class indexClass;
    protected final RexsterGraph graph;

    public RexsterIndex(final RexsterGraph graph, final String indexName, final Class indexClass) {
        this.graph = graph;
        this.indexName = indexName;
        this.indexClass = indexClass;
    }

    public void remove(final String key, final Object value, final T element) {
        String clazz;
        if (element instanceof Vertex)
            clazz = RexsterTokens.VERTEX;
        else if (element instanceof Edge)
            clazz = RexsterTokens.EDGE;
        else
            throw new RuntimeException("The provided element is not a legal vertex or edge: " + element);
        RestHelper.delete(this.graph.getGraphURI() + RexsterTokens.SLASH_INDICES_SLASH + RestHelper.encode(this.indexName) + RexsterTokens.QUESTION + RexsterTokens.KEY_EQUALS + key + RexsterTokens.AND + RexsterTokens.VALUE_EQUALS + RestHelper.uriCast(value) + RexsterTokens.AND + RexsterTokens.CLASS_EQUALS + clazz + RexsterTokens.AND + RexsterTokens.ID_EQUALS + RestHelper.encode(element.getId()));

    }

    public void put(final String key, final Object value, final T element) {
        String clazz;
        if (element instanceof Vertex)
            clazz = RexsterTokens.VERTEX;
        else if (element instanceof Edge)
            clazz = RexsterTokens.EDGE;
        else
            throw new RuntimeException("The provided element is not a legal vertex or edge: " + element);
        RestHelper.put(this.graph.getGraphURI() + RexsterTokens.SLASH_INDICES_SLASH + RestHelper.encode(this.indexName) + RexsterTokens.QUESTION + RexsterTokens.KEY_EQUALS + key + RexsterTokens.AND + RexsterTokens.VALUE_EQUALS + RestHelper.uriCast(value) + RexsterTokens.AND + RexsterTokens.CLASS_EQUALS + clazz + RexsterTokens.AND + RexsterTokens.ID_EQUALS + RestHelper.encode(element.getId()));
    }

    public CloseableIterable query(final String key, final Object query) {
        throw new UnsupportedOperationException();
    }

    public String getIndexName() {
        return this.indexName;
    }

    public Class getIndexClass() {
        return this.indexClass;
    }

    public CloseableIterable get(final String key, final Object value) {
        if (Vertex.class.isAssignableFrom(this.indexClass))
            return (CloseableIterable) new RexsterVertexIterable(this.graph.getGraphURI() + RexsterTokens.SLASH_INDICES_SLASH + RestHelper.encode(this.indexName) + RexsterTokens.QUESTION + RexsterTokens.KEY_EQUALS + key + RexsterTokens.AND + RexsterTokens.VALUE_EQUALS + RestHelper.uriCast(value), this.graph);
        else
            return (CloseableIterable) new RexsterEdgeIterable(this.graph.getGraphURI() + RexsterTokens.SLASH_INDICES_SLASH + RestHelper.encode(this.indexName) + RexsterTokens.QUESTION + RexsterTokens.KEY_EQUALS + key + RexsterTokens.AND + RexsterTokens.VALUE_EQUALS + RestHelper.uriCast(value), this.graph);
    }

    public boolean equals(final Object object) {
        if (object.getClass().equals(this.getClass())) {
            Index other = (Index) object;
            return other.getIndexClass().equals(this.getIndexClass()) && other.getIndexName().equals(this.getIndexName());
        } else {
            return false;
        }
    }

    public String toString() {
        return StringFactory.indexString(this);
    }

    public long count(final String key, final Object value) {
        final JSONObject countJson = RestHelper.get(this.graph.getGraphURI() + RexsterTokens.SLASH_INDICES_SLASH + RestHelper.encode(this.indexName) + RexsterTokens.SLASH_COUNT + RexsterTokens.QUESTION + RexsterTokens.KEY_EQUALS + key + RexsterTokens.AND + RexsterTokens.VALUE_EQUALS + RestHelper.uriCast(value));
        return countJson.optLong("totalSize");
    }
}