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/*
 * Copyright 2009 the original author or authors.
 *
 * 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 org.gradle.api.reporting.internal;

import groovy.lang.Closure;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.NamedDomainObjectSet;
import org.gradle.api.internal.DefaultNamedDomainObjectSet;
import org.gradle.api.reporting.Report;
import org.gradle.api.reporting.ReportContainer;
import org.gradle.api.specs.Spec;
import org.gradle.internal.reflect.Instantiator;
import org.gradle.util.ConfigureUtil;

import java.util.SortedMap;

public class DefaultReportContainer extends DefaultNamedDomainObjectSet implements ReportContainer {

    private NamedDomainObjectSet enabled;

    public DefaultReportContainer(Class type, Instantiator instantiator) {
        super(type, instantiator, Report.NAMER);

        enabled = matching(new Spec() {
            public boolean isSatisfiedBy(T element) {
                return element.isEnabled();
            }
        });

        beforeChange(new Runnable() {
            public void run() {
                throw new ImmutableViolationException();
            }
        });
    }

    public NamedDomainObjectSet getEnabled() {
        return enabled;
    }

    public ReportContainer configure(Closure cl) {
        ConfigureUtil.configureSelf(cl, this);
        return this;
    }
    
    public T getFirstEnabled() {
        SortedMap map = enabled.getAsMap();
        if (map.isEmpty()) {
            return null;
        } else {
            return map.get(map.firstKey());
        }
    }

    protected  N add(Class clazz, Object... constructionArgs) {
        N report = getInstantiator().newInstance(clazz, constructionArgs);

        if (report.getName().equals("enabled")) {
            throw new InvalidUserDataException("Reports that are part of a ReportContainer cannot be named 'enabled'");
        }

        getStore().add(report);
        index();
        return report;
    }
}