/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective;

import com.google.common.base.Preconditions;
import java.util.Date;
import java.util.Objects;
import org.opendaylight.yangtools.concepts.SemVer;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.model.api.ModuleImport;

final class ModuleImportImpl implements ModuleImport {
    private final String moduleName;
    private final Date revision;
    private final SemVer semVer;
    private final String prefix;

    public ModuleImportImpl(final String moduleName, final Date revision, final String prefix) {
        this(moduleName, revision, prefix, Module.DEFAULT_SEMANTIC_VERSION);
    }

    public ModuleImportImpl(final String moduleName, final Date revision, final String prefix, final SemVer semVer) {
        this.moduleName = Preconditions.checkNotNull(moduleName, "Module name must not be null.");
        this.revision = revision;
        this.prefix = Preconditions.checkNotNull(prefix, "Import prefix must not be null.");
        this.semVer = Preconditions.checkNotNull(semVer, "Semantic version of module must not be null.");
    }

    @Override
    public String getModuleName() {
        return moduleName;
    }

    @Override
    public Date getRevision() {
        return revision;
    }

    @Override
    public SemVer getSemanticVersion() {
        return semVer;
    }

    @Override
    public String getPrefix() {
        return prefix;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + Objects.hashCode(moduleName);
        result = prime * result + Objects.hashCode(revision);
        result = prime * result + Objects.hashCode(prefix);
        result = prime * result + Objects.hashCode(semVer);
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        ModuleImport other = (ModuleImport) obj;
        if (!Objects.equals(getModuleName(), other.getModuleName())) {
            return false;
        }
        if (!Objects.equals(getRevision(), other.getRevision())) {
            return false;
        }
        if (!Objects.equals(getPrefix(), other.getPrefix())) {
            return false;
        }
        if (!Objects.equals(getSemanticVersion(), other.getSemanticVersion())) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "ModuleImport[moduleName=" + moduleName + ", revision=" + revision + ", prefix=" + prefix + "]";
    }

}