src/main/java/org/apache/sling/scripting/javascript/wrapper/ScriptableProperty.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.sling.scripting.javascript.wrapper;

import javax.jcr.Property;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;

import org.apache.sling.scripting.javascript.SlingWrapper;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.Undefined;

/** Wrap a JCR Property as a Scriptable */
@SuppressWarnings("serial")
public class ScriptableProperty extends ScriptableBase implements SlingWrapper {

    public static final String CLASSNAME = "Property";

    private static final Class<?>[] WRAPPED_CLASSES = { Property.class };

    /**
     * The wrapped JCR Property instance. Will be {@code null} if the
     * {@link #jsConstructor(Object)} method is not called, which particularly
     * is the case for the Property host object prototype.
     */
    private Property property;

    public ScriptableProperty() {
    }

    public void jsConstructor(Object res) {
        this.property = (Property) res;
    }

    @Override
    public String getClassName() {
        return CLASSNAME;
    }

    public Class<?>[] getWrappedClasses() {
        return WRAPPED_CLASSES;
    }

    public Object jsGet_value() {
        try {
            return property.getValue();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_values() {
        try {
            return property.getValues();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_string() {
        try {
            return property.getString();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_stream() {
        try {
            return property.getStream();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_long() {
        try {
            return property.getLong();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_double() {
        try {
            return property.getDouble();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_date() {
        try {
            return property.getDate();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_boolean() {
        try {
            return property.getBoolean();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_node() {
        try {
            return ScriptRuntime.toObject(this, property.getValue());
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public Object jsGet_length() {
        try {
            return property.getLength();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public long[] jsGet_lengths() {
        try {
            return property.getLengths();
        } catch (RepositoryException re) {
            return new long[0];
        }
    }

    public Object jsGet_definition() {
        try {
            return property.getDefinition();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public int getType() {
        try {
            return property.getType();
        } catch (RepositoryException re) {
            return PropertyType.UNDEFINED;
        }
    }

    public Object jsGet_session() {
        try {
            return property.getSession();
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public String jsGet_path() {
        try {
            return property.getPath();
        } catch (RepositoryException e) {
            return property.toString();
        }
    }

    public String jsGet_name() {
        try {
            return property.getName();
        } catch (RepositoryException e) {
            return property.toString();
        }
    }

    public Object jsGet_parent() {
        try {
            return ScriptRuntime.toObject(this, property.getParent());
        } catch (RepositoryException re) {
            return Undefined.instance;
        }
    }

    public int jsGet_depth() {
        try {
            return property.getDepth();
        } catch (RepositoryException re) {
            return -1;
        }
    }

    public boolean jsGet_new() {
        return property.isNew();
    }

    public boolean jsGet_modified() {
        return property.isModified();
    }

    public Object jsFunction_valueOf(String hint) {
        if ("undefined".equals(hint)) {

            try {
                switch (property.getType()) {
                    case PropertyType.BOOLEAN:
                        return property.getBoolean();
                    case PropertyType.DATE:
                        return property.getDate();
                    case PropertyType.DOUBLE:
                        return property.getDouble();
                    case PropertyType.LONG:
                        return property.getLong();
                    default:
                        return toString();
                }
            } catch (RepositoryException re) {
                // don't care, just return the string value
                return toString();
            }

        } else if ("object".equals(hint)) {
            // return this as a Scriptable :-)
            return this;

        } else if ("function".equals(hint)) {
            // cannot return this as a Function
            return Undefined.instance;

        } else if ("boolean".equals(hint)) {
            // boolean value
            try {
                property.getBoolean();
            } catch (RepositoryException re) {
                return false;
            }

        } else if ("number".equals(hint)) {
            // numeric value
            try {
                property.getDouble();
            } catch (RepositoryException re) {
                return 0.0;
            }
        }

        // unknown hint or "string"
        return toString();
    }

    @Override
    public Object get(String name, Scriptable start) {
        final Object fromSuperclass = super.get(name, start);
        if(fromSuperclass != Scriptable.NOT_FOUND) {
            return fromSuperclass;
        }

        if(property == null) {
            return Undefined.instance;
        }

        return getNative(name, start);
    }

    public Object jsFunction_toString() {
        return toString();
    }

    @Override
    public String toString() {
        if (property != null) {
            try {
                return property.getValue().getString();
            } catch (RepositoryException e) {
                return property.toString();
            }
        }

        return String.valueOf((Object) null);
    }

    // ---------- Wrapper interface --------------------------------------------

    public Object unwrap() {
        return property;
    }

    @Override
    protected Class<?> getStaticType() {
        return Property.class;
    }

    @Override
    protected Object getWrappedObject() {
        return property;
    }
}