modules/core/src/main/java/org/apache/ignite/internal/processors/cache/query/QueryEntityClassProperty.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.ignite.internal.processors.cache.query;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import org.apache.ignite.internal.util.typedef.F;
import org.apache.ignite.internal.util.typedef.internal.S;

/**
 * Description of type property.
 */
public class QueryEntityClassProperty {
    /** */
    private final Member member;

    /** */
    private QueryEntityClassProperty parent;

    /** */
    private String name;

    /** */
    private String alias;

    /**
     * Constructor.
     *
     * @param member Element.
     */
    public QueryEntityClassProperty(Member member) {
        this.member = member;

        name = member.getName();

        if (member instanceof Method) {
            if (member.getName().startsWith("get") && member.getName().length() > 3)
                name = member.getName().substring(3);

            if (member.getName().startsWith("is") && member.getName().length() > 2)
                name = member.getName().substring(2);
        }

        ((AccessibleObject)member).setAccessible(true);
    }

    /**
     * @param alias Alias.
     */
    public void alias(String alias) {
        this.alias = alias;
    }

    /**
     * @return Alias.
     */
    public String alias() {
        return F.isEmpty(alias) ? name : alias;
    }

    /**
     * @return Type.
     */
    public Class<?> type() {
        return member instanceof Field ? ((Field)member).getType() : ((Method)member).getReturnType();
    }

    /**
     * @param parent Parent property if this is embeddable element.
     */
    public void parent(QueryEntityClassProperty parent) {
        this.parent = parent;
    }

    /** {@inheritDoc} */
    @Override public String toString() {
        return S.toString(QueryEntityClassProperty.class, this);
    }

    /**
     * @param cls Class.
     * @return {@code true} If this property or some parent relates to member of the given class.
     */
    public boolean knowsClass(Class<?> cls) {
        return member.getDeclaringClass() == cls || (parent != null && parent.knowsClass(cls));
    }

    /**
     * @return Full name with all parents in dot notation.
     */
    public String fullName() {
        assert name != null;

        if (parent == null)
            return name;

        return parent.fullName() + '.' + name;
    }
}