com.ocs.dynamo.filter.Contains.java Source code

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Here is the source code for com.ocs.dynamo.filter.Contains.java

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/*
   Licensed 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 com.ocs.dynamo.filter;

import java.util.Collection;

import org.apache.commons.lang.ObjectUtils;

/**
 * A filter that checks if a value is contained in a collection
 * 
 * @author bas.rutten
 */
public class Contains extends AbstractFilter implements PropertyFilter {

    private final Object value;

    private final String propertyId;

    /**
     * @param propertyId
     *            the property that represents the collection
     * @param value
     *            the object that needs to be checked
     */
    public Contains(String propertyId, Object value) {
        this.propertyId = propertyId;
        this.value = value;
    }

    @Override
    public String getPropertyId() {
        return propertyId;
    }

    public Object getValue() {
        return value;
    }

    @Override
    public boolean evaluate(Object that) {
        if (that == null) {
            return false;
        }
        Object collection = getProperty(that, getPropertyId());
        if (collection != null && Collection.class.isAssignableFrom(collection.getClass())) {
            Collection<?> col = (Collection<?>) collection;
            return col.contains(value);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return ObjectUtils.hashCode(value) + ObjectUtils.hashCode(propertyId);
    }

    @Override
    public boolean equals(Object obj) {
        // Only objects of the same class can be equal
        if (obj == null || !getClass().equals(obj.getClass())) {
            return false;
        }
        Contains c = (Contains) obj;

        return ObjectUtils.equals(propertyId, c.getPropertyId()) && ObjectUtils.equals(value, c.getValue());
    }

    @Override
    public String toString() {
        return getPropertyId() + " " + super.toString() + " " + getValue();
    }

}